M S. rnm^p TENTHREDINOIDEA By ALEX. D. MACGILLIVRAY /// Reprinted from the Hymenoptera of Connecticut, Connecticut Geological Natural History Survey. Bulletin 22, pages 25-175 December 1, 1916 HYMENOPTERA OF CONNECTICUT. 25 TENTHREDINOIDEA*. By Alexander Dyer MacGilltvray. This superfamily is differentiated from the other superfam- ilies of Hymenoptera by having the cephaHc end of the a'bdomen as broad where it is joined to the thorax as the caudal end of the thorax, never constricted into a narrow pedicel ; by having the first abdominal segment joined to the abdomen, instead of being closely anchylosed to the thorax and bearing a pair of spiracles, and usually with its tergum longitudinally divided at middle ; by the retention in practically all the species of the base of the radial sector; and by the presence in many of the species of more than one anal cell. Their larvae either feed externally on the leaves of plants, within their stems, or within the trunks of trees. They can be distinguished from the larvae of other Hymenoptera by the pres- ence of prominent abdominal prolegs, and from the larvae of the Lepidoptera, with which they are most likely to be confused, by the presence of only a single ocellus on each side of the head. The most useful characters for distinguishing the species of Tenthredinoidea are found on the head capsule and on the ovi- positor of the female. The ovipositor of the female consists of two parts, an ex- ternal flattened plate on each side, and two median flattened, pointed, yellowish plates located between the external plates. The external plates are known as the saw-guides. The variation in the shape of the three exposed margins, upper, lower, and api- cal, of the saw-guides is usually characteristic for a given species. The yellowish, chitinized plates located between the saw-guides are the saws. The distal end and ventral margin of each saw are usually denticulate. The shape and arrangement of the denti- cles or teeth are also usually characteristic for a given species or group of species. • Contributions from the Entomological Laboratories of the University of Illinois, No. 50. 26 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [BuU. The variation in the shape of the head and in its sculpture is of the greatest importance for differentiating species, because it is usually characteristic for both sexes. In order to condense the descriptions and make them more accurate, names have been applied to the various head regions and their boundaries. They are as follows : Tentorial Fovecs. — The tentorial foveas are the pit-like open- ings situated between the antennal sockets and the dorsal margin of the clypeus. They mark the points of invagination for the anterior arms of the tentorium. They vary from mere pits to flaring, trumpet-shaped holes. Antennal Furrows. — The antennal furrows, when complete, extend from the tentorial foveae along the lateral margin of the antennal sockets, thence across the cephalic aspect of the head to near the lateral ocelli, thence across the dorsal aspect, and finally end on the caudal margin just below the ridge separating the dorsal and caudal margins of the head. While the antennal furrows are frequently complete, yet certain sections are some- times obsolete, so that it is desirable to refer to different sections of the antennal furrows. Vertical Furrozvs. — The vertical furrows are the portions of the antennal furrows situated on the dorsal aspect of the head. They extend from near the lateral ocelli to the caudal aspect of the head. The vertical furrows are rarely wanting and are usually more distinctly marked than the other parts of the anten- nal furrows. Lateral Fovece. — The portions of the antennal furrows ex- tending between the vertical furrows and the antennal sockets are sometimes completely wanting. The antennal furrows, in many cases, instead of being entirely obsolete, are represented on each side of the head by a distinct pit. These pits are known as the lateral foveae. They are located near the antennal sockets and may be connected with them by a short furrow. They vary considerably in size, shape, and location. Ocellar Furrozv. — The ©cellar furrow is a transverse furrow extending between the ends of the vertical furrows near the dorsal margin of the lateral ocelli. It is frequently confluent with the space around the lateral ocelli. No. 22.] HYMENOPTERA OF CONNECTICUT. 2/ Inter ocellar Furrozv. — The interocellar furrow is a short de- pressed line or space extending from the middle of the ocellar furrow to the median ocellus. Adjacent to the median ocellus, this furrow flares out, and is frequently a depressed area sur- rounding the ocellus. Post ocellar Area. — The postocellar area is the region on the dorsal aspect of the head bounded by the ocellar furrow, the vertical furrows, and the caudal margin of the head. Frontal Crest. — ^The frontal crest is an elevation extending across the head just above the antennal sockets. It separates the region between the antennae from the region above it. The frontal crest is usually limited on each side by the antennal fur- rows, but it may extend across the antennal furrows nearly to the margin of the compound eyes. It is frequently interrupted at middle by the median fovea, when it is said to be broken. Antennal Groove. — The antennal groove is the curved portion of the antennal furrow extending on each side of the head be- tween the tentorial fovea and the frontal crest around the lateral margin of the antennal sockets. Supraclypeal Area. — The supraclypeal area is the region be- tween the antennal sockets, the clypeus, and the frontal crest. It may be flat, uniformly convex, carinated, or concave. Median Fovea. — The median fovea is a rounded or angular pit located near the middle of the ventral margin of the frontal crest. The median fovea is figured and described by some au- thors as the antennal fovea. Antennal Fovece. — The antennal foveas are the depressed areas surrounding the antennal sockets. The antennal furrows and the lateral foveae are frequently connected with the antennal foveae. Frontal Area. — The frontal area comprises the region of the head located between the antennal furrows, the frontal crest, and the ocellar furrow. Ocellar Basin. — The depressed area surrounding the median ocellus is frequently continued as a concave area to the frontal crest. The interocellar furrow is frequently expanded so as to occupy most of the space between the lateral ocelli. Tliis con- cave area, occupying the median portion of the frontal area, 28 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. is known as the ocellar basin. The ocellar basin varies greatly in fonn and extent in the ditterent families and subfamilies. Frontal Furroiv. — The frontal furrow is a well marked de- pression occurring on the meson of the ocellar basin of many species. It may be limited to a pit or fovea, or it may extend from the median ocellus to the frontal crest. It may not only vary in length, but may vary in position and be located anywhere in the space between the median ocellus and the frontal crest. There is also considerable variation in the width of the furrow. Malar Sf'acc. — The malar space is the area on each side of the head included between the proximal end of the mandible and the ventral end of the compound eye. Key to Families. I. Front wings with free part of Ra present; antenna always with more than three segments, third segment of antennas usuallj' longer than all the following segments together XYELID-t p. 29 Front wings with free part of Rj always wanting; antennie with three or more segments, third segment never as long as all the following segments together; if third segment be long, antennse consisting of only three segments 2 3. Front wings with base of subcosta always present; pronotum transverse and scarcely emarginate behind PAMPHILIlD.li p. 32 Front wings with base of subcosta wanting, at most repre-r sented only by a pale indistinct line; subcosta usually represented by the free part of Sci, which appears like a cross-vein in cell between costa and R + M; pronotum transverse but frequently so deeply emarginate behind that the mesal portion is concealed by the head 3 3. Front wings with radial cross-vein received in cell R4, very rarely in cell Rs; medio-cubital cross-vein joined to R+M or to M; if joined to M, first abscissa of M not more than one-sixth the length of the cross-vein; oviposi- tor in form of a saw, exserted or retracted; anterior tibias with two apical spurs TENTHREDINID.E p. 41 Front wings with radial cross-vein received in cell Rs, rarely in cell R«; if in cell R4, medio-cubital cross-vein joining media distinctly distad of radius and subequal in length to first abscissa of media; ovipositor in form of a saw or borer and usually exserted; anterior tibiae with one apical spur 4 No. 22.] HYMENOPTERA OF CONNECTICUT. 29 4. Front wings with first abscissa of Ma present; antennae in- serted between eyes above base of clypeus, with bases of antennas fully exposed 5 Front wings with first abscissa of Ma wanting; antennae in- serted below level of eyes at base of clypeus under a trans- verse ridge of the front, their bases concealed ORYSSID^ p. 175 5. Front wings with a distinct cell between costa and Sc + R -h M; medio-cubital cross-vein subequal in length to first abscissa of media 6 Front wings without a cell between costa and Sc + R + M; medio-cubital cross-vein from three to five times as long as first abscissa of media CEPHID^ p. 172 6. Front wings with free part of Sci always present; first ab- scissa of media extending lengthwise of wing; the last abdominal tergite not ending in a triangular or lanceolate process XIPHYDRIID^ p. 168 Front wings with free part of Sci always wanting; first ab- scissa of media extending crosswise of wing; last ab- dominal tergite ending in a triangular or lanceolate process SIRICID^ p. 169 XYELIDAE. Key to Genera. 1. Front wings with free part of M arising a considerable dis- tance beyond point of union of R + M and Sca; hind wings with free part of R5 wanting; claws with a minute tooth-like protuberance at base or with a long slender seta at apex 2 Front wings with free part of M arising distinctly before point of separation of R and Scj; hind wings with free part of Ru present; claws cleft or with a large tooth within at apex 3 2. Front wings with Sc not coalesced with R + M, so that free part of Sc2 appears like a cross-vein between apex of Sc and R -1- M Pleuroneura p. 30 Front wings with Sc coalesced with R + M, so that the free part of Sca is obliterated Xyela p. 30 3. Front wings with free part of R subequal in length to R + Sca • 4 Front wings with free part of R distinctly shorter than R + Sca, frequently less than one-half the length of R + Sca 5 4. Claws with a large erect tooth within at middle Odontophyes p. 30 Claws cleft, two parts of cleft parallel Megaxyela p. 31 30 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 5. Clypeus triangular in outline, median portion two or three times as long as lateral portions; claws cleft, two parts of cleft parallel Paraxyela p. 31 Clypeus not triangular in outline, median portion but little if any longer than lateral portions; claws with an erect tooth at middle 6 6. Front wings with free part of Sca almost twice as long as free part of Sci; Sci much more oblique than SC2; cell R» usually divided by a supernumerary cross-vein; clypeus much broader at middle than at lateral emarginations .... Protoxyela p. 31 Front wings with free part of Sc2 subequal in length with free part of Sci; Sci and Sc2 inclined at about the same angle; cell Rs never divided by a supernumerary cross- vein; clypeus only slightly if at all broader at middle than at lateral emarginations '. . .Macroxyela p. 31 Pleuroneura Konow. °P. brunneicornis Rohwer. Body black, with the mandibles, a line on the pronotum, and the tegulas, pallid ; clypeus, labrum, palpi, legs, venter, and three apical abdominal segments, rufo-fulvous ; hind tibiae infuscated ; clypeus truncate with a triangular tooth at middle ; antennal fur- rows indistinct above the middle of the head; no fovea at side of lateral ocelli. Length 6 mm. Xyela Dalman. °X. minor Norton. Body yellowish, with indistinct or subdistinct brownish spots on the three basal segments of the antennas, a parenthesis-shaped spot each side of the ocelli, two spots on each lateral lobe of the mesonotum; third segment of the antennae distinctly shorter than all the following segments together and longer than the first and second together; ovipositor slender, longer than the abdo- men; wings elongate, projecting one-half their length beyond the apex of abdomen. Length 4 mm. Larva feeds on stami- nate flowers of Pimts. Odontophyes Konow, °0. avingrata (Dyar). Body steel blue, with the following parts yellow^ : the labrum, bases of the mandibles, palpi, bases of the antennae, tips No. 22.] HYMENOPTERA OF CONNECTICUT. 3I of the anterior and middle femora, trochanters, and four apical segments of the posterior tarsi ; head roughened with large, closely placed punctures ; abdomen iridescent with fine transverse wavy striations. Length 13 mm. Larva resembling a bird's dropping, feeds on the young leaves of hickory and butternut. Megaxyela Ashmead. °M. major (Cresson). Xyela major Cresson. Body ferruginous, with black and yellow markings ; pos- terior tibi« broadly expanded and flattened, covered with setae which form a brush along the ventral side. Length 10 mm. Larva feeds on hickory. Paraxyela JMacGillivray. °P. tricolor (Norton). Xyela tricolor Norton. Body steel blue, with the following parts white : spots at the insertion of the antennse, nasus, labruni, mandibles, palpi, and edges of the ventral segments ; the following parts black : edge of labrum, tips of posterior femora, tibiae, and tarsi ; legs rufous. Length 8 mm. Protoxyela JMacGillivray. °P. aenea (Norton). Howard, Insect Book, pi. xiii. Fig. 5. Body bronze-black with the follov/ing parts rufous ; first segment of antennse, supraclypeal area, clypeus, labrum, man- dibles, legs including the coxse, venter at apex, and apical two- thirds of saw-guides ; abdominal segments beyond the basal plates with a fine apical white margin. Length 7 mm. Macroxyela Kirby. Key to Species. 1. Head with a flat depressed area in front of median ocellus, never crossed by the median fovea 2 Head, if with a depressed area in front of median ocellus, always broken by the median fovea, which extends to the median ocellus 4 2. IMedian fovea represented by a linear smooth spot only slightly, if at all, depressed below the surface of the front; body black, with clypeus, labrum, malar space, supraclypeal area, basal plates at sides, abdomen beyond the basal plates, and legs rufous. Length 8 mm bicolor 32 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. Median fovea not linear and distinctly depressed below the surface of the front 3 3, Median fovea a broad, flat, indistinct depressed area, more distinct near the median ocellus; saw-guides strongly con- vex above on the basal half and straight or slightly convex below; body rufous, with a spot about the ocelli, a spot near the base of wings, and the base of abdomen above, more or less black. Length 8 mm obsoleta Median fovea a distinct, narrow, elongate, diamond-shaped depression, flat on the bottom; saw-guides convex above on basal half and straight below; body rufous, with two spots on lateral lobes of mesonotum and the postscutel- lum black. Length 8 mm distincta 4. INIedian fovea a wedge-shaped depression, narrowed near the median ocellus, with polished, sloping walls; saw-guides strongly convex on basal two-thirds above and almost straight below; body rufous, with antennae beyond the second segment, a spot about the ocelli, a spot above the base of each antenna, a spot on the apex of the median lobe of the mesonotum, two spots on each lateral lobe, and the two basal tergal segments black. Length 9 mm. ferruginea Median fovea vase-shaped, a semicircular, slanting depres- sion adjacent to the median ocellus, broadly boat-shaped on the middle of the front, the two parts connected by a narrower portion with high bounding walls; saw-guides moderately convex on basal two-thirds above and straight below; body rufous, with usually a spot about the ocelli, and two spots on each median lobe of mesonotum black. Length 8 mm infuscata •^M. bicolor IMacGillivray. °M, obsoleta MacGillivray. °M. distincta MacGillivray. °M. ferruginea (Say). Xyela ferruginea Say. °M. infuscata C Norton). Xyela infuscata Norton. Larva feeds on the leaves of elm. PAMPHILIID^. Key to Genera. I. Claws cleft, the two rays subequal in length; hinder margin of posterior orbits with a distinct fine carina 5 Claws with a small median or submedian erect tooth 2 No. 22.] HYMENOPTERA OF CONNECTICUT. 33 2. Anterior tibiae with a lateral spur before the apex 3 Anterior tibias without a lateral spur before the apex 4 3. Hind margin of posterior orbits without a carina Acantholyda p. 3;^ Hind margin of posterior orbits with a distinct, fine carina Itycorsia p. 33 4. Front wings with medio-cubital cross-vein joined to media distinctly beyond its point of separation from radius Cephaleia p. 35 Front wings with medio-cubital cross-vein joined to media at its point of separation from radius Caenolyda p. 36 5. Front wings with free part of Sci present, cells C and Sci distinct 6 Front wings with free part of Sci wanting so that cells C and Sci are united Neurotoma p. 37 6. Antennae with third segment not or scarcely longer than fourth, at least always shorter than segments four and five united Pamphilius p. 37 Antennae with third segment as long as or longer than seg- ments four and five united Anoplolyda p. 39 Acantholyda Costa. °A. marginiventris (Cresson). Tergum black, with a narrow lateral white or pinkish margin ; antennae black ; legs black, except the anterior tibiae in front ; head black with the clypeus white ; a spot between the base of the antenna and the eye, a pair of spots in front of the ocelli, a pair of lunate marks behind the ocelli, a narrow band from the eyes to the occiput, and the outer orbits, white; a triangular spot on the median lobes of the mesonotum, white. Length 15 mm. ^A. bicolorata (Norton). Tergum honey yellow, with the two apical segments black ; antennae black; legs black; head brown, with a spot at the hase of each antenna, a triangular spot above each eye, one about the ocelli, and a large spot on the vertex, black. Length 12 mm. Itycorsia Konow. Key to Species. 1. Pleurae entirely black 2 Pleurae either with a broad oblique pale spot or entirely pale 3 34 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 2. Body black, with the following parts rufous: head, ex- cept labrum, a spot around bases of antennae, mandibles, greater part of lateral lobes of mesonotum, scutellum, post- scutellum, and anterior tibiae and tarsi; lateral margin of abdominal segments with a fine yellow line; wings in- fuscated. Length 12 mm bmnniceps Body, in female, black, with the following parts yellowish white: spot on bases of mandibles, spot on cheeks, narrow line from the caudal end of eyes to the occiput where it expands and extends along the caudal margin of the pos- terior orbits to near their middle, two ovate spots on vertex, a narrow line on pronotum, a line on suture between median and lateral lobes, a spot on each lateral lobe, and an irregular spot on the lateral margin of each abdominal segment; tibiae and anterior tarsi rufous; wings hyaline, with a clouded spot extending across wings behind the stigma. Male differs in having the antennas usually rufous at middle, a yellowish spot at caudal end of each eye, mandibles in great part yellow, spots on abdominal segments limited to a line, and all the tibise and tarsi yellowish rufous. Length 16 mm maculiventris 3. Pleurae and sternum black, with an oblique pale mark on pleurae; legs in part marked with black 6 Pleurae and sternum wholly rufous or ochraceous; legs en- tirely rufous or ochraceous 4 4. Head with the summit of the declivous area at the base of antennae broadly rounded; body rufous, with tips of an- tennas infuscated, and tergum, except a line along the late- ral margin, black; median fovea an elongate pit situated midway between the bases of antennae and ocelli; basal segment of antennae rufous. Length 14 mm ochrocera Head with the summit of the declivous area at the base of antennae elevated into a distinct transverse ridge; basal segment of the antennae marked with black 5 5. Head with the postocellar area elevated above ocelli; eye margin angulated opposite ocelli; median fovea a deep depression with distinct boundaries, nearer to the ocelli than to the bases of antennae; head with indefinite black lines, more pronounced in region of ocelli; median lobe of mesonotum, scutellum and metathorax in part, and a nar- row band on the base of abdominal segments, black. Length 14 mm angfulata Head with postocellar area not elevated above ocelli; eye margin not angulated opposite ocelli; median fovea an . elongate slit nearer to the ocelli than to the bases of antennae; head with indefinite black lines in the region of No. 22.] HYMENOPTERA OF CONNECTICUT. 35 ocelli; median lobe at base, lateral lobes at middle, base of scutellum, metathorax in part, and a narrow transverse band on the base of each abdominal segment, black. Length 14 mm discolor 6. Large yellow spot laterad of the bases of antennae smooth without punctures; clypeus and labrum yellow, produced at middle into a distinct spearhead-shaped projection, rarely punctate and if so bearing white setae; head and thorax with the usual yellow spots; legs all yellow or yellowish-rufous with the femora black above; abdomen almost entirely rufous or with a narrow black line on the caudal margin of the segments, in some specimens the black bands expanded onto the cephalic part of the next segment until some of the segments are almost entirely black. Length 13 mm luteomaculata Large yellow spot laterad of the bases of antennae completely covered with punctures, each puncture bearing a black seta; labrum and clypeus yellow, produced at middle into a triangular-shaped projection and distinctly punctate, the punctures bearing black setae; head and thorax with the usual yellow spots; legs yellow or yellowish-rufous with all the femora black above and all with more or less black beneath; abdomen black above with a narrdw yellow lateral margin. Length 14 mm albomarginata °I. brunniceps (Cresson). Lyda hrunniceps Cresson. °I. maculiventris (Norton). Lyda maculiventris Norton. I. ochrocera (Norton). Lyda ochrocera Norton. Walling- ford, I June, 1910 (D. J. Caffrey), 13 July, 191 1 (J. K. Lewis) ; Stonington, 15 June, 1908 (W. E. B.). I. angulata MacGillivray. Manchester, 20 May, 1910 (A. B. C.) ; Wallingford, 7 July, 191 1 (J. K. Lewis). °I. discolor (Cresson). *I. luteomaculata (Cresson). Lyda luteomaculata Cresson. Torrington (R. Hochstein). *I. albomarginata (Cresson). Lyda albomarginata Cresson. New Haven, 24 June, 1905 (H. L. V.). Cephaleia Panzer. Key to Species. I. Pleurae entirely black 2 Pleurae with a prominent oblique pale mark 3 2,6 CONNECTICUT GEOL. AND NAT, HIST. SURVEY. [BulL 2. Head black, with the following parts ferruginous: spot on the side of face and on the apical middle of clypeus, broad line on cheeks, and two spots behind ocelli; antennae in great part pale yellow; wings hyaline, with a fuscous band beneath stigma; abdomen violaceous black, trans- versely banded at middle with yellowish ferruginous. Length 15 mm fascipennis Head rufous, with a black spot around ocelli, extending to the bases of antennae; tegulae and immediate adjacent parts of pronotum and wings ferruginous; body, including wings, violaceous black. Length 18 mm frontalis. 3. Scutellum yellow; head and thorax black, with the usual straw-yellow markings; antennae black; abdomen black, with a rufous or honey-colored transverse band on seg- ments two to four and the tip of the anal segment of the same color; wings faintly clouded. Length 11 mm canadensis Scutellum black 4 4. Head and thorax blackish, with the usual yellow spots; antennae varying from yellow to blackish fuscous; abdo- men entirely luteous or with an irregular median blackish band; legs luteous, front and middle femora black above, posterior entirely black. Length 11 mm mathematica .Head and thorax black, with clypeus and three elongate spots extending from it between the antennae and along the inner orbits, outer orbits, tegulae, and an oblique pleural mark, yellow; abdomen black with the lateral margin and the venter more or less yellow; legs wholly pale, rufous or ochreous. Length 11 mm .distincta. °C. fascipennis (Cresson). °C. frontalis (Westwood). °C. mathematica (Kirby). P amp hilius mat hematicus Kirhy^ °C. canadensis Norton. "C. distincta MacGillivray. Caenolyda Konow. °C. semidea (Cresson). Lyda semidea Cresson. Head and thorax kiteous or brownish, with the usual yellow-colored spots faintly indicated; antennas luteous beyond first segment ; abdomen entirely luteous or brownish ; legs luteous, with the basal three-fourths of the femora rufous, fuscous, or black; wings hyaline, veins luteous or brownish. Length 12 mm. No. 22.] HYMENOPTERA OF CONNECTICUT. T^-J Neurotoma Konow. *N. fasciata (Norton). Howard, Insect Book, pi. xiv, Fig. 15- Body in female black, with the following parts yellow: a shield-shaped spot between the antennae, tegulse, scutellum, post- scutellum, a triangular spot on the caudo-lateral angles of the fourth to the sixth tergal segment, and legs except coxse and basal half of femora ; wings fuliginous, front wings clear at apex. Male differs in having scutellum and postscutellum black, and legs beyond coxae entirely yellow. Length 12 mm. Larva feeds on cherry. Connecticut (E. N.). °N. inconspicua (Norton). Body dull black, with tegulae yellow and mandibles and legs beyond the coxae rufous; tarsi black; wings hyaline, with a faint fuscous band behind the stigma. Length 9 mm. Larva feeds on cherry. Pamphilius Latreille. Key to Species. 1. Antennas white beyond the first segment; head and thorax black, with the usual pale markings; abdomen black, with a white lateral margin and a transverse band on the middle of the four apical segments; legs yellow, with anterior and middle coxse, anterior trochanters, basal half of anterior and middle femora, and apices of their tibiae and tarsi, posterior coxae in part, and apices of their tibiae and tarsi, black; wings hyaline. Male differs from female only in having the spots on head and thorax smaller and the black on legs more pronounced. Length 10 mm semicinctus Antennas entirely black, yellow or rufous beyond the middle 2 2. Head and thorax in female luteous with black markings; abdomen luteous with a longitudinal black or fuscous band on each side of tergum within the margin; legs entirely luteous, darker toward apex; wings hyaline. Male differs in having disk of the head, thorax, and abdomen black with yellow spots; posterior tibiae and all the tarsi fuscous. Length 9 mm ocreatus Head and thorax black, with yellow markings 3 3. Abdomen rufous beyond the first segment 5 Abdomen black, with the third and fourth segments rufous 4 4. Head with a strongly elevated V-shaped ridge behind the median ocellus; body black, with declivous part of the 38 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. head, mesal surface of the basal segment of antennae, apical half of antennae, genae, a line on the outer orbits adjacent to the eyes, a spot on the posterior orbits, tegulae, and the legs below the coxae, except the posterior tibiae, white; abdomen with segments three and four entirely, the basal half of five, and a line on six, rufous. Length 11 mm. transversus Head not with a strongly elevated V-shaped ridge behind the median ocellus; body black, with mandibles, declivous part of the head, a line on the posterior orbits, a spot on each side of the postocellar area, a spot on each side on the caudal margin of head, tegulae, scutellum, post- scutellum, and legs beyond the coxae, yellow. Length 8 mm rufocinctus 5. Pleurae with a pale mark; body black, with clypeus, poste- rior orbits, genae, a broad band from the middle of the eye to the occiput, two prominent, triangular-shaped dilations on the inner side near the eye, two parenthesis- shaped spots near the postocellar area, three minute spots on the front, tegulae, V-spot, scutellum, postscutel- lum, front and middle legs, and posterior trochanters and femora, yellow; mandibles, posterior tibiae and tarsi, and abdomen beyond the basal plates, rufous. Length 9 mm. persicus Pleurae without a pale mark 6 6. Labrum with a small median tooth 7 Labrum broadly rounded without a median tooth; ocellar basin sharply defined, a V-shaped ridge behind median ocellus and two broad mounds in front; body in female black, with apical half of antennas, clypeus, lower half of the outer orbits, a line on the genae adjacent to the eyes, a bifid dilation on the inner orbits extending as a line to the occiput, its inner margin extending to the vertical fur- rows, ridges about the ocellar basin, a spot on each verti- tical furrow, tegulae, a line on the collar, the V-spot, scutellum, postscutellum, and the legs below the knees, white; abdomen rufous beyond the basal plates. Male differs in having the area in front of the frontal crest and the basal segment of antennae yellow, spots on the orbits and vertex wanting. Length 8-10 mm dentatus 7. Median fovea wanting; ocellar basin strongly defined; body black, with apical half of antennae, clypeus, base of mandi- bles, lower half of posterior orbits, area around ocellar basin, a spot on each vertical furrow, a line from the middle of the inner orbits to the occiput (enlarged at occipital end), tegulae, prosternum, and legs beyond the No. 22.] HYMENOPTERA OF CONNECTICUT. 39 coxae, except posterior tibiae and tarsi, yellow; abdomen reddish beyond the first segment. Length lo mm ocellatus Median fovea open and elongate; ocellar basin not sharply defined; body black, with apex of the clypeus, genae, three spots about ocelli, a line from the inner orbits to the eyes, a spot on the vertical furrows, apical third of the antennae, tegulae, scutellum, legs below coxae, except the posterior tibiae, pale yellow; abdomen rufous beyond the first seg- ment. Length 7.75 mm rubi ■^P, semicinctus (Norton). Lyda semicincta Norton. P. ocreatus (Say). Lyda ocreata Say. Howard, Insect Book, pi. xiv, Figs. 4 and 9. Connecticut (Norton) ; New Haven, 21 May, 1910 (A. B. C). Larva a solitary feeder on Corylus. "P. transversus MacGillivray. ^P. rufocinctus (Cresson). Lyda rufochicta Cresson. *P. persicus MacGillivray, Yalesville, Meriden, Walling- ford, Middlefield, Durham, North Haven, New Haven, Hamden, Cheshire, Farmington (B. H. W.) ; Yalesville, June (W. E. B.). Larva feeds on peach. For a full account of this insect and its appearance as a pest, see 7th Report State Entomologist, in Report for 1907-8 of Con- necticut Agricultural Experiment Station, New Haven, p. 285. *P. dentatus MacGillivray. Hamden, 24 May, 1910, New Haven, 30 May, 1911 (B. H. W.) ; Wallingford, 8 June, 1911 (B. H. W. and D. J. Caffrey). Larva feeds on blackberry. See Report of Connecticut Agricultural Experiment Station for 19 12, p. 236. °P. ocellatus Rohwer. ■^P. rubi Rohwer. Larva feeds on blackberr}^ Anoplolyda Costa. Key to Species. 1. Pleurae with a large oblique pale stripe 2 Pleurae black 4 2. Abdom.en rufous at least beyond first segment 3 Abdomen black, except a rufous spot on the first and the most of the second and third segments of the tergum; 40 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [BuU. legs black to the middle of femora, and beyond the middle of femora yellow-red; antennae black; scutellum and post- scutellum yellow; head yellow in front of ocelli except a black line above each antenna; wings hyaline. Length J, jj^jYi excavata 3. Antennae black at base, yellow at apex; body black, with head and thorax with the usual yellow markings; legs, except coxae and apical three-fourths of the hinder tibiae, pale yellow; wings hyaline. Length 10 mm luteicomis Antennae black; body black, with head and thorax with the usual yellow markings; legs, except posterior femora, yel- low; wings hyaline. Length 12 mm pallimacula 4. Scutellum black; head yellow, with the area behind and in- cluding ocelli and between the antennal furrows, black; pronotum, tegulas, and (in female) legs beyond the coxae, yellow; abdomen black with rufous spot covering the disk of second to fourth segments of tergum and venter; anten- nae black; wings strongly infuscated. Male differs in having the apex of the posterior tibiae black. Length 13 mm plagiata Scutellum pale 5 5. Abdomen rufous beyond the first segment. 6 Abdomen marked with rufous at middle, black at apex 7 6. Antennae black; mesal projecting spot on the inner margin of eye pointed at apex and not bifid; anterior ocellus entirely surrounded by yellow; head and thorax with the usual pale markings; legs yellow beyond the middle of coxae; wings hyaline; the basal half of stigma yellow. Length 12 mm quebecensis Antennae white beyond the middle; mesal projecting spot on the inner margin of eyes deeply bifid at apex; anterior ocel- lus not entirely surrounded by yellow, interrupted by a furrow on each side; head and thorax with the usual pale markings; legs yellow beyond coxae, except posterior tibiae •which are black; wings hyaline; stigma black. Length 12 mm scripta 7. Abdomen black, with a rufous spot on the disk of tergal seg- ments one to four; head and thorax with the usual pale markings, except that those on the head are reduced t^ fine lines; legs bej'ond coxae, greenish yellow; antennae black; wings hyaline, veins and stigma black. Length 9 mm. perplexa Abdomen black at base and apex with a transverse rufous band at middle; legs beyond coxae entirely yellow; trans- verse ridge in front of ocelli and vertex deeply impressed by the antennal furrows; head and thorax with the usual pale markings; second segment of the antennae about No. 22.] HYMENOPTERA OF CONNECTICUT. 4I twice as long as broad ; wings yellowish-hyaline ; antennae black. Length 9 mm rufofasciatus °A. excavata (Norton). *A, luteicornis (Norton). Farmington (E. N.). A. pallimacula (Norton). Howard, Insect Book, PI. xii, Fig. 6. Farmington (E. N.). °A. plagiata (Klug). Howard, Insect Book, PI. xiv, Fig. 22. °A. quebecensis (Provancher). A. scripta (Say). Farmington; New Haven, 4 June, 191 1, Hamden, 2 June, 1911 (A. B. C), 14 June, 191 1 (W. E. B.). °A. perplexa (Cresson). A. rufofasciatus (Norton). Connecticut (E. N.). TENTHREDINIDAE. Key to Subfamilies. 1. Front wings with second anal cell contracted at middle .... 2 Front wings with second anal cell not contracted at middle 5 2. Front wings with free part of second anal vein present 3 Front wings with free part of second anal vein wanting. Selandriin^ p. 65 3. Radial cross-vein present; antennae never with more than nine segments 4 Radial cross-vein wanting; antennae always with more than nine segments Diprionin^ p. 43 4. Front wings with free part of vein R5 present and cells Rs and R* therefore separate 5 Front wings with free part of vein R5 wanting, so that cells Rs and Ri are united Dolerin.^ p. 68 5. Front wings with medio-cubital cross-vein and free part of Ms+4 parallel . • . Emphytin.^ p. 45 Front wings with medio-cubital cross-vein and free part of M3+4 strongly divergent behind Phyllotomin^ p. yj 6. Radial cross-vein present 7 Radial cross-vein wanting 13 7. Front wings with medio-cubital cross-vein joined to vein Sc+R+M at or near origin of media, its distance from media always less than one-half the length of the cross- vein 8 Front wings with medio-cubital cross-vein joined to vein Sc-|-R+M at a distance from origin of media, its distance 42 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. from media always one-half or more the length of the cross-vein lo 8. Front wings with medio-cubital cross-vein and M3+4 parallel Blennocampin^ p. 142 Front wings with medio-cubital cross-vein and M3+4 strongly- divergent behind 9 9. Hind wings with vein Ra reaching the margin distinctly before apex of wing; cell R1+2 pointed at apex and closed SCOLIONEURIN^ p. I58 Hind wings with vein R3 reaching the margin at or beyond apex of wing; cell Rm rounded at apex and open Fenusin^ p. 156 10. Front wings with base of third anal vein present and second anal cell therefore not combined with third 11 Front wings with base of third anal vein atrophied and second and third anal cells therefore united DlNEURIN^E p. 107 11. Front wings with medio-cubital cross-vein and vein M3+4 parallel or at least not divergent behind 12 Front wings with medio-cubital cross-vein and vein M3+4 strongly divergent behind HoPLOCAMPiNiE p. 105 12. Antennse with eight or nine segments, rarely enlarged at apex; front wings with first abscissa of M subequal to abscissa of R; radio-medial cross-vein rarely if ever want- ing Tenthredinin.i: p. 80 Antennas with less than eight segments, always enlarged at apex into a club; front wings with first abscissa of M twice as long as abscissa of R; radio-medial cross-vein always wanting Cimbicin^ p. 102 13. Front wings with third and combined first and second anal veins anastomosed at middle for a short distance, length of anastomosis always being less than length of second anal cell 14 Front wings with third and combined first and second anal veins anastomosed at middle for a considerable distance, anastomosis being two or three times the length of second anal cell, or with second anal cell wanting or combined with third anal cell, or with both first and second anal cells wanting 15 14. Antennae never with more than nine segments; hind wings with vein Rs reaching the margin before apex of wing; cell Ri+2 pointed at apex and closed* Cladiin^e p. 108 Antennas always with more than nine segments; hind wings with vein Rs reaching the margin at apex of wing; cell Ri+j broad at apex and open Monoctenin^ p. 108 15. Antennas always with nine segments Nematin,e p. hi Antennae with three or six segments 16 No. 22.] HYMENOPTERA OF CONNECTICUT. 43 16. Antennae with six segments; front wings with three anal veins fused into a single vein Acordulecerin^ p. 165 Antennae with three segments; front wings with three anal veins never fused into a single vein 17 17. Front wings with free part of Sci present Hylotomin^ p. 160 Front wings with free part of Sci wanting Schizocerin^ p. 164 DlPRIONIN.^. Diprion Schrank. Lophyrus Latreille. Antennas multiarticulate, with fifteen or more segments, strongly serrate in the female and bipectinate in the male, the rays shorter toward the apex ; larvae infesting various species of conifers. Key to Species. 1. Antennae with sixteen segments, black; head, thorax, abdomen, and legs in great part luteous ; wings hyaline. Females fabricii Antennae with more than sixteen segments 2 2. Head and thorax for the most part pale. Females 3 Head and thorax for the most part black. Males 8 3. Femora black or dusky at base; antennae with eighteen segments; antennae and scutellum pale yellow; mesonotum with large black spots occupying the greater part of its surface; head and thorax sparsely covered with deep punc- tures abdominalis Femora wholly pale 4 4. Tibiae waxen white, at least at base; antennae with seventeen segments 5 Tibiae with no part waxen white; antenna usually with more than seventeen segments • • 6 5. Antennae luteous brown; tegulae, collar, and pleurae luteous brown; a line joining the ocelli, a stripe on each side lobe of the mesothorax, and the sutures of the metathorax, black; claws with a tooth near the middle pinus-rigida Antennae black, with basal half of third segment pale; tegulae, collar, and pleurae waxen white; sides of metathorax black; claws with the tooth distinctly nearer the apex than the middle abbotti 6. Lateral lobes of mesonotum pale. . . . : 7 Lateral lobes of mesonotum and sutures metallic black; body yellowish brown; antennae with eighteen segments, black, the third segment pale at base; claws with a short tooth near the tip abietis 44 CONNECTICUT GEOL. AND NAT. HIST. SURVEY, [Bull. 7. Antennas with twenty segments; color yellow-brown; antennae blackish; metathorax, tergum, and a stripe down each side of the venter, black; edges of pronotum, pleurae, ojjter edges of abdomen, and knees, waxen white lecontei Antennae with seventeen segments; color ferruginous; antennas blackish ferruginous; sutures of face, mesothorax, abdo- men, most of metathorax, and part of third and fourth seg- ments of tergum, blackish; pleurae dark brown akhursti 8. Collar and edge of tegulae white; antennae with eighteen seg- ments; ventral part of body and legs yellow-brown; basal half of wings clouded abbotti Collar and tegulae black 9 9. Antennas with fifteen segments; abdomen beneath and at base and basal half of legs, yellow-brown; legs below knees whitish pinus-rigida Antennae with more than fifteen segments 10 10. Antennae with twenty-one segments; head and mesothorax black; tergum dark piceous; pleurae and breast black; venter reddish brown, legs reddish yellow, darkest at base abietis. Antennae with twenty-two or more segments lecontei °D. fabricii (Leach). Lophyrus fabricii l^each. Larva feeds on pitch pine. °D. abdominalis (Say) Lophyrus abdominalis Say. D. pinus-rigida (Norton). Lophryiis pinus-rigida Norton, Larva feeds on Pinus rigida, and this is probably the species observed at Tariffville a few years ago, where many of the small pitch pines were nearly defoliated (W. E. B.). D. abbotti (Leach). Lophyrus abbotti Leach. Howard, Insect Book, PI. xii, Fig. 3. Larva feeds on white pine and pitch pine. Middletown, 1911 ; Litchfield, 1916. D. abietis (Harris). Lophryus abietis Harris. Larva feeds on black spruce, fir, pitch pine. Connecticut (E. N.), D. lecontei (Fitch). Lophryus lecontei Fitch. Howard, In- sect Book, PI. xiv. Fig. 5. Larva feeds on white pine, pitch pine, Pinus banksiana, Scotch pine, and Austrian pine. Middletown (D, MacDonald) ; Hampton (A. B. Roberts) ; Stamford, 8 May, 191 1 (R. T. Morris), °D. akhursti (Norton). Lophyrus akhursti Norton. no. 22.] hymenoptera of connecticut. 45 Emphytin^. Key to Genera. 1. Posterior metatarsus subequal in length or shorter than the four following segments 2 Posterior metatarsus distinctly longer than the four following segments 13 2. Front wings with second abscissa of Cui never shorter than free part of M4 3 Front wings with second abscissa of Cui always shorter than free part of M< 8 3. Front wings with second abscissa of Cui distinctly longer than free part of AI*; claws with a minute erect tooth at middle 4 Front wings with second abscissa of Cui subequal in length to free part of Mi 5 4. Front wings with free part of 2d A oblique; hind wings with cell Ri+2 without an appendage at apex Hemitaxonus p. 46 Front wings with free part of 2d A perpendicular; hind wings with cell Ri+a with an appendage at apex Epitaxonus p. 46 5. Hind wings with cell Ri^s always with a distinct appendage at apex; front wings with free part of 2d A oblique 6 Hind wings with cell R1+2 never with an appendage at apex; front wings with free part of 2d A perpendicular Taxonus p. 46 6. Claws bifurcate at apex Monostegia p. 47 Claws always with a tooth but never bifurcate at apex 7 7. Claws cleft, with inner lobe not more than one-half the length of outer lobe Phrontosoma p. 47 Claws with an erect tooth at middle Empria p. 48 8. Front wings with radio-medial cross-vein ahvaj'S present.... 9 Front wings with radio-medial cross-vein always wanting Emphytus p. 55 9. Hind wings either with free part of Ri, or transverse part of M2, or with both present 11 Hind wings with both free part of R4 and transverse part of M2 wanting 10 10. Claws with a large erect tooth at middle. .. .Parataxonus p. 57 Claws appendiculately toothed at base Polytaxonus p. 58 11. Hind wings with both free part of R* and transverse part of IM: present Eriocampa p. 58 Hind wings with free part of R4 wanting 12 12. Head and thorax strongly cribrately punctate Pseudosiobla p. 58 Head and thorax smooth, without punctures. . .Monosoma p. 59 46 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [BuU. 13. Front wings with medio-cubital cross- vein present 14 Front wings with medio-cubital cross-vein wanting Macremphytus p. 59 14. Antennae with second segment elongate, about twice as long as broad Strongylogastroidea p. 61 Antennae with second segment annular, not or hardly as long as broad Dimorphopteryx p. 64 Hemitaxonus Ashmead. H. dubitatus (Norton). Taxonus dubitatus Norton. Body black, with the following parts rufous : labrum, clypeus, tegulae, collar broadly, lobes of mesonotum, sternum, pleurae, legs except posterior tibiae and tarsi of female, entire abdomen in fe- male, and abdominal segments one, two, and three in male; an- tennae with third and fourth segments subequal; median fovea deep and broad, frontal ridge unbroken, ocellar basin completely enclosed. Length 10 mm. Larva feeds on Onoclea. Connecticut (E. N.) ; East Hartford, 9 August, 1904, New Haven, 27 July, 1904 (P. L. B.) ; Cheshire, 8 July, 1904, New Haven, 4 July, 1905, Thompson, 11 July, 1905 (H. L. V.) ; Bran- ford, 3 July, 1905 (H. W. W.) ; Milldale, 21 May, 1906, New Haven, 19 July, 1905, i June, 191 1 (B. H. W.) ; Torrington, 7 July, 1905 (W. E. B.) Epitaxonus MacGillivray. °E. albidopictus (Norton). Taxonus alhidopictus Norton. Body black, with the following parts rufous : pleurae, sternum, a band on abdpminal segments one to three, coxae, femora except a ring on apex of posterior pair, and front and middle tibiae except their basal fourth; with the following parts white: labrum, cly- peus, collar, tegulae, basal fourth of all the tibiae, and basal half of posterior metatarsus ; median fovea extending laterad to the eyes ; frontal ridge unbroken, and ocellar basin completely enclosed. Length 8 mm. Larva feeds on Onoclea sensibilis. Taxonus Hartig. Key to Species. I. Abdomen entirely black; body black, with all the legs, except the posterior tarsi, rufous; posterior tarsi fuscous; antennae with third segment distinctly longer than fourth; frontal No. 22.] HYMENOPTERA OF CONNECTICUT. 47 ridge wanting, median fovea coinciding with ocellar basin and extending as a narrow groove to above the median ocellus; wings very slightly infuscated, veins and stigma brownish. Length 8 mm nigrisomus Abdomen black, transversely banded with rufous 2 2. Coxae black; body black, with the following parts rufous: labrum, tegulae, a band covering a part of the second and the third and fourth abdominal segments, and legs, except middle and posterior tarsi; third segment of anten- nae longer than fourth; median fovea wanting; ocellar basin distinct, its walls not prominent. Length 8 mm. innominatus Coxae in part pale; body black, with the following parts rufous or white: labrum, tegulas, collar (black in male), entire abdomen in female and a band on segments two to four in male, apices of coxae, trochanters, femora at apex and base, and base of tibiae; hind femora and tibiae in male black; wings hyaline; each ocellus in a basin. Length 6 mm amicus *T. nigrisomus Norton. Larva feeds on dock. Hartford (Nason) ; Branford, 15 July, 1905 (H. W. W.) ; Thompson, 11 July, 1905 (H. L. V.) ; Stonington, 10 August, 1906 (J. A. Hyslop). °T. innominatus AlacGillivray. °T. amicus Norton. Monostegia Costa. M. martini MacGillivray. Body black, with the following parts rufous : labrum, collar broadly, tegulae, metathorax, abdomen, legs, and base of wings; second segment of antennae as long as fourth and fifth together; frontal ridge wanting, and median fovea and ocellar basin united. Length 7 mm. Larva feeds on CEnothera. Hartford (W. E. B.). Phrontosoma MacGillivray. Key to Species. 1. Prothorax and mesonotum in great part rufous 2 Prothorax and mesonotum black 3 2. Antennal furrow below lateral ocelli broad and coarsely punctate; body black, with tegulae, a fine line on the col- 48 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. lar, and all the legs beyond the apical third of femora, white; apex of posterior tibise and tarsi infuscated; frontal ridge wanting, and median fovea and ocellar basin con- tinuous; third segment of antennae as long as fourth and fifth together. Length 6 mm atra Antennal furrow below lateral ocelli narrow, with sharp walls, and impunctate; body black, with tegulse, a narrow margin to pronotum, front and middle legs beyond basal fourth of femora, and posterior legs beyond knees, white; second segment of antennas about as long as first, third about equal to fourth and fifth together; frontal ridge wanting, median fovea and ocellar basins continuous. Length 8 mm nortoni 3. Femora black except at apex; body black, with a rufous spot covering the collar and mesonotum; tegulse and legs be- yond the apical third of the femora, .white; third seg- ment of the antennae as long as fourth and fifth together; frontal ridge distinct and unbroken, median fovea and ocellar basin therefore not continuous; median fovea as large as or larger than the ocellar basin and extending through the supraclypeal area; triangular depression be- hind median ocellus not extending to the antennal furrow. Length 7 mm daeckei Femora white; body black, with a rufous spot covering the greater part of prothorax and mesonotum; third segment of antennae hardly as long as fourth and fifth together; frontal ridge distinct and unbroken; median fovea long and distinct; ocellar basin almost wanting; triangular depression behind median ocellus distinct and extending to the antennal furrow. Length 7 mm coUaris °P. atra MacGillivray. °P. nortoni MacGillivray. °P. daeckei MacGillivray. ''P. collaris MacGillivray. Empria LePeletier. Key to Species. 1. Clypeus uniformly flat or convex 2 Clypeus with a median longitudinal ridge or carina, fre- quently minute 6 2. Antennal furrows broadly rounded depressions, continuous from the antennal fovea to the lateral ocelli; ocellar basin a broadly depressed area from near the antennae to the median ocellus; median fovea a minute pit; ocellar and No. 22.] HYMENOPTERA OF CONNECTICUT. 49 interocellar furrows wanting; clypeus broadly roundly emarginate; third segment of antennae longer than fourth; saw-guides straight above and broadly rounded below to a blunt point at apex above; body black, with labrum, tegulae, and legs, except a spot on the outer margin of coxae, white. Length 7 mm cavata Antennal furrows linear, broadly interrupted on the middle of the front 3 3. Ocellar basin a distinct depression extending to median ocel- lus 4 Ocellar basin wanting, or at most indicated only adjacent to median ocellus; median fovea a rounded pit 5 4. Ocellar basin a linear depression, with a distinct median fovea at its ventral end; ocellar furrow indicated at mid- dle; interocellar furrow distinct; clypeus moderately deeply, angularly emarginate, with a low broad projec- tion at middle; third segment of antennae slightly longer than fourth; saw-guides straight above, convex below, narrowly obliquely rounded at apex; body black, with clypeus, labrum, tegulae, a line on the collar, coxae at apex, trochanters more or less, front femora, middle and hind femora at apex, front tibiae and tarsi, middle tibiae at base and beneath, and their tarsi, and hind tibiae at base, dirty white. Length 7 mm callosa Ocellar basin a broad depression with broadly sloping sides, with a deep, broad median fovea at its ventral end; ocellar and interocellar furrows distinct; clypeus slightly bi-emar- ginate at apex, practically truncate; third and fourth seg- ments of antennae subequal; saw-guides convex above, convex below, broadly convexly rounded to a blunt point at middle of apex; body black, with collar, tegulae, base of wings, and legs, white. Length 6 mm caetrata 5. Postocellar area and dorsal margin of head polished, region of ocellar furrow flattened ; ocellar and interocellar fur- rows distinct; clypeus angularly emarginate, lobes broadly rounded; third segment of antennae longer than fourth; ocellar basin represented by a depression in front of me- dian ocellus; median fovea deep with flaring sides; saw- guides with upper and lower margins parallel and trun- cately rounded at apex; body black, with clypeus at sides, labrum, tegulae, collar, wings at base, and legs beyond apices of coxae, except the front and middle femora more or less beneath, hind femora in great part, and hind tibiae at apex, white. Length 6 mm celsa Postocellar area and dorsal margin of head finely punctate; ocellar and interocellar furrows distinct; clypeus broadly, 4 50 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. shailowly, angularly emarginate, the lobes broadly round- ed; third and fourth segments of antennae subequal; ocellar basin not indicated in front of median ocellus; median fovea large with flaring sides; saw-guides with their upper and lower margins converging, obliquely truncately rounded at apex; body black, with mandibles, clypeus, labrum, collar, tegulse, base of wings, and legs, except infuscations on femora, hind tibiae, and more or less of their tarsi, white. Length 7 mm convexa 6. Ocellar basin extending to median ocellus 7 Ocellar basin not extending to median ocellus, at most only indicated adjacent to median ocellus or median fovea 17 7. Clypeus black 8 Clypeus white 12 8. Ocellar basin dumb-bell-shaped, constricted to a mere line at middle, broad and pit-like adjacent to median ocellus; median fovea an elongate pit; antennal furrows interrupted on the middle of the front; ocellar and interocellar fur- rows distinct; clypeus emarginate with a distinct tooth at middle; third segment of antennae longer than the fourth; saw-guides with upper margins straight, lower margins converging, and broadly obliquely rounded at apex; body black, with labrum, clypeus, collar, tegulae, base of wings, and legs beyond apices of coxae, white. Length 6 mm callida Ocellar basin not dumb-bell-shaped, of approximately the same width throughout 9 9. Clypeus with a broad, convexly rounded median ridge, occu- pying almost one-third of the width of clypeus; antennal furrows interrupted on the middle of the front; median tooth of clypeus distinctly shorter than lateral lobes, lateral lobes broadly rounded; ocellar furrow linear, in- terocellar furrow broad and distinct; third segment of antennae almost as long as fourth and fifth together; saw- guides convex above and below, slightly obliquely rounded at apex; body black, with collar, tegulas, front and middle legs below knees, and hind tibiae beneath, white. Length 6 mm cava Clypeus with a fine linear median carina; antennal furrows more or less distinct throughout 10 10. Clypeus tridentate, median tooth as long as lateral angles, broadly, shailowly emarginate, lateral angles rounded, me- dian ridge low, not reaching dorsal margin of clypeus; postocellar area uniformly convex; ocellar and interocellar furrows distinct; third segment of antennae longer than fourth; saw-guides slightly convex above, broadly con- vexly rounded below and at apex to a blunt point above; No. 22.] HYMENOPTERA OF CONNECTICUT. 5 1 body black, with collar, tegulse, legs beyond knees for the most part, and caudal margin of abdominal segments, white. Length, 6 mm costata Clypeus tridentate, median tooth not more than one-fourth the length of lateral lobes ll 11. Clypeus shallowly, angularly emarginate, almost truncate, with a small but distinct tooth, lobes angularly rounded; median fovea a rounded pit opposite dorsal margin of antennal fovea; front not strongly produced between an- tennae; ocellar and interocellar furrows deep and distinct; third segment of antennae slightly longer than fourth; saw-guides slightly concave above, convex below, broadly rounded to a blunt point at middle of apex; body black, with labrum, collar, tegulae, front and middle legs below apex of femora, and basal third of hind tibias, white. Length 6 mm calda Clypeus distinctly, but shallowly, roundly emarginate with a minute tooth, lobes acute; median -fovea a pit opposite the middle of antennal fovea; front strongly produced be- tween antennae; ocellar and interocellar furrows distinct; third and fourth segments of antennae subequal; body black, with collar and tegulse white; front and middle legs beyond the basal third of their femora, and hind legs be- yond the apical fourth of their femora, yellowish infus- cated. Length 6 mm cata 12. Ocellar basin extending beyond median fovea to the middle of antennal fovea; supraclypeal area elevated; median fovea but little deeper than ocellar basin; front strongly pro- duced between antennae; ocellar furrow only faintly indi- cated; interocellar furrow distinct; clypeus deeply roundly emarginate, with a minute tooth at middle, and lobes angular; third segment of antennae longer than fourth; saw-guides convex above, straight below, and broadly rounded at apex; body black, with clypeus, labrum, tegu- lae, collar, and legs beyond coxae, white. Length 7 mm. caprina Ocellar basin not extending beyond median fovea to the middle of antennal fovea 13 13. Clypeus broadly, shallowly, roundly emarginate 14 Clypeus narrowly, deeply emarginate 15 14. Ocellar basin narrow and linear, ending ventrally in a pit- like median fovea, but little if any wider than ocellar basin; clypeus with a low, broadly rounded tooth at middle, lobes rounded; ocellar and interocellar furrows distinct; third segment of antennae longer than fourth; saw- guides gradually converging on upper and lower margins, and broadly roundly pointed at apex; body black, with 52 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. margin of clypeus, labrum, line on collar, tegulae, front and middle legs below coxae, except infuscation on the middle of femora, hind trochanters, tip of hind femora, base of hind tibiae, and base of their tarsi, white. Length 7.5 mm casta Ocellar basin rather broad, broader near the median fovea; median fovea a broad crater, much wider than the ocellar basin; clypeus with a low broad tooth at middle, lobes broadly rounded; ocellar furrow indicated, interocellar fur- row broad and distinct; the third segment of antennas dis- tinctly longer than fourth; saw-guides convex above, straight and converging to the roundly truncated apex; body black, with clypeus, labrum, collar, tegulas, trochan- ters, front legs below the middle of femora, middle and hind legs beyond knees, apex of hind tibiae and hind tarsi, more or less infuscated, white. Length 7 mm. ' celebrata 15. Clypeus with a low, broadly rounded tooth at middle 16 Clypeus with a small, acutely pointed tooth; ocellar basin broad with sloping sides, ending ventrally in a large me- dian fovea with broadly sloping sides; ocellar and inter- ocellar furrows distinct; third segment of antennae longer than fourth; saw-guides convex above and below, broadly convexly rounded at apex, extreme apex truncate for a very short distance; body black, with clypeus, labrum, collar, tegulae, and legs below knees, white. Length 6 mm. captiosa 16. Supraclypeal area narrow and carinately elevated; clypeus angularly emarginate with broadly rounded lobes and with a broadly rounded median tooth; median fovea an elongate pit with flaring sides at the ventral end of ocellar basin; ocellar furrow indicated, interocellar furrow distinct; third segment of antennae distinctly longer than fourth; saw- guides parallel above and below and truncately rounded at apex; body black, with clypeus, labrum, tegulae, and collar narrowly white; legs more or less infuscated. Length 6 mm caeca Supraclypeal area rather broad and only convexly elevated; clypeus deeply, narrowly, angularly emarginate to near the middle of clypeus; lobes roundly pointed; clypeal tooth small but distinct; ocellar and interocellar furrows distinct; a depressed area in front of median ocel- lus; third segment of antennas distinctly longer than fourth; saw-guides with upper and lower margins parallel and broadly truncately rounded at apex; body black, with clypeus, labrum, collar, tegulae, front and middle legs be- yond the apices of coxae, bases of their femora, more or No. 22.] HYMENOPTERA OF CONNECTICUT. 53 less infuscated; hind trochanters, tibise and tarsi, some- times infuscated, white. Length 7 mm maculata 17. Clypeus black, heavily punctate 18 Clypeus white, smooth or finely punctate 22 18. Clypeus distinctly emarginate 19 Clypeus truncate; antennal furrows adjacent to antennal fovea well marked; ocellar furrow linear, distinct; inter- ocellar furrow broad and deep; third segment of antennae distinctly longer than fourth; saw-guides convex above, convex below, broadly converging to a blunt point just above the middle of apex; body black, with front and mid- dle legs below the middle of femora, and base of tibiae, ringed with white. Length 7 mm cauduca 19. Interocellar furrow extending each side of median ocellus, forming an inverted Y-shaped furrow 20 Interocellar furrow extending only to median ocellus, form- ing only the stem of the Y; median fovea a rounded scar; clypeus with median tooth almost as long ps lateral lobes, all angular, appearing tridentate; ocellar and interocellar furrows linear, deep; third and fourth segments of anten- nae subequal; saw-guides convex above and below and slightly obliquely rounded at apex, the lower angle more rounded than the upper; body black, with collar, tegulae, front and middle femora beneath at apex, front tibiae, mid- dle tibias beneath, and a ring at the base of the hind tibiae, white. Length 6 mm castigata 20. Median fovea a rounded depression 21 Median fovea a wedge-shaped depression; clypeus with tooth and lobes pointed; ocellar furrow faint; interocellar fur- row distinct; postocellar area with a median furrow; antennas with third and fourth segments subequal; bodj' black, with collar, tegulae, apical half of front and middle femora, their tibiae, and knees of hind legs, all more or less infuscated, white. Length 6 mm casca 21. Median fovea a minute pin-hole pit; front flat adjacent to the fovea; clypeus with a small median tooth and lateral lobes broadly rounded; ocellar and interocellar furrows deep and distinct; third segment of antennae slightly longer than fourth; saw-guides straight above, and the lower margin and apex broadly obliquely rounded to a point at the apex above; body black, with collar and tegulae white; legs beyond the middle of femora brownish infus- cated. Length 6 mm ignota Median fovea a broad pit with flaring sides; clypeus with a fine, median carina, median tooth short, lateral lobes broadly angular; ocellar furrow linear, interocellar fur- 54 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. row broad; saw-guides convex above, and broadly convexly rounded below and at apex to a blunt point; body black, with a line on collar, apex of front and middle femora, their tibiae, and basal third of hind tibiae, white. Length 6 mm evecta 22. Clypeus broadly, shallowly emarginate 23 Clypeus narrowly, deeply emarginate, with a small median tooth and carina, lobes broadly angular; median fovea of moderate size, with perpendicular sides, except in front, strongly flaring; a triangular-shaped pit in front of median ocellus; ocellar furrow fine, interocellar furrow broad; saw-guides straight above, straight below, and converging to apex, apex with angles broadly rounded and square at middle; body black, with clypeus, labrum, collar, tegulae, and legs below knees, tibiae and tarsi, more or less infus- cated, white. Length 6 mm ' candidula 23. Postocellar area longitudinally carinate at middle; clypeus broadly emarginate; ocellar furrow faint or wanting, inter- ocellar furrow distinct; third segment of antennae nearly as long as fourth and fifth together; saw-guides convex above and below, convexly and slightly obliquely trun- cately rounded at apex; body black, with clypeus, labrum, collar, tegulae, front and middle legs below coxae, femora more or less infuscated, hind trochanters, and a ring on the base of hind tibiae, white. Length 6 mm canora Postocellar area flat, not carinate at middle 24 24. Clypeus angularly emarginate with lobes angular; median fovea a pin-hole pit; ocellar and interocellar furrows, faint; third segment of antennae longer than fourth; saw- guides convex above and oblique below, roundly truncated at apex; body black, with clypeus, labrum, collar, tegulae, front and middle trochanters, and hind tibiae and tarsi, white. Length 6 mm cauta Clypeus roundly emarginate with lobes broadly rounded at apex; median fovea a pin-hole pit; ocellar furrow faint, in- terocellar furrow distinct; third segment of antennae slightly longer than fourth; saw-guides straight above, convex below, truncately rounded at apex; body black, with clypeus, labrum, collar, tegulae, front and middle legs below coxae, hind trochanters, and basal third of hind tibiae, white. Length 7 mm cariosa °E. cavata MacGillivray. °E. callosa MacGillivray. °E. caetrata MacGillivray. °E. celsa MacGillivray. No. 22.] HYMENOPTERA OF CONNECTICUT. 55 °E. convexa (MacGillivray). °E. callida MacGillivray. °E. cava MacGillivray. *E. costata MacGillivray. New Haven, ii May, 191 1 (B. H. W.). E, calda AlacGillivray. New Haven, 15 May, 1905 (B. H. W.). °E. cata MacGillivray. °E. caprina MacGillivray. °E. casta MacGillivray. °E. celebrata MacGillivray. °E. captiosa MacGillivray. °E. caeca MacGillivray. E. maculata (Norton). Harpiphorns maculatus Norton. Larva feeds on strawberry. Connecticut (E. N.) ; Hartford, 12 May, 1894; Mt. Carmel, 24 May, 1906, Westville, 2 June, 1908, Yalesville, 26 May, 1908, New Haven, 22 May, 1908 (B. H. W.). °E. cauduca MacGillivray. °E. castigata MacGillivray. E. casca MacGillivray. New Haven, 24 May, 1905 (W. E. B.). E. ignota (Norton). Monostegia ignota Norton. Larva feeds on strawberry. Connecticut (E. N.). E. evecta MacGillivray. New Haven, 24 May, 1905 (W. E. B.). E. candidula MacGillivray. Waterbury, 9 June, 1905 (W. E. B.). °E. canora MacGillivray. °E. cauta MacGillivray. E. cariosa MacGillivray. Hamden, 25 May, 191 1 (B. H. W.). Emphytus Klug. Key to Species. I. Head with the antennal furrow at most only faintly indi- cated; collar white 2 56 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull, Head with a distinct antennal furrow extending from the cly- peus to the occiput ; collar black 3 2. Abdomen with venter white or rufous; body black, with the following parts white: clypeus, labrum, collar, tegulae, a spot on pleurae, last dorsal abdominal segment, and legs except the posterior tarsi; tergum of abdomen black, with a median broad triangular rufous spot on each seg- ment, the spots frequently united, forming an irregular band; antennae with third and fourth segments subequal; median fovea an elongate, shallow groove; ocellar basin wanting. Length 7 mm apertus Abdomen with venter black; body black, with the following parts white: fine line on collar, tegulae sometimes, an interrogation-shaped point on pleurae (sometimes want- ing), and legs, except middle and posterior tarsi in female and posterior tibiae and tarsi in male; antennae with third segment longer than fourth; median fovea a broadly ex- panding pit just above supraclypeal area; ocellar basin wanting. Length 8 mm inomatus 3. Femora wholly rufous; body black, with the following parts white: labrum usually, tegulae, apices of coxae, trochanters, and fourth abdominal segment in female for the greater part; legs, except the parts named, rufous; antennae with third and fourth segments subequal; ocellar basin an elon- gate depressed area extending from anterior ocellus to supraclypeal area, angular above, broadly roundly ex- panded along the sides, and pointed below, with median fovea at its apex; ocellar furrow distinct, connected with ocellar basin, indicated by a minute notch; saw-guides with upper margins straight and lower margins broadly convexly rounded to a point at apex. Length 8-10 mm mellipes Femora of anterior and middle legs at least in great part black 4 4. Femora all in great part black; body black, with the following parts white: tegula;, costa at base, posterior trochanters, anterior and middle femora at apex in front, basal fourth of tibiae, and fourth abdominal segment ni female; legs, with coxae and anterior and middle trochanters black, all the other parts not named, rufous; antennae with third seg- ment longer than fourth, and fourth and fifth subequal; median fovea a broad pit just above supraclypeal area; ocellar basin an ovate depressed area separated from the median fovea by a distinct transverse ridge and extending for some distance behind the lateral ocelli as a fine groove; ocellar furrow wanting; saw-guides convex above and broadly convexly rounded below, and extending to a bluntly rounded point at apex above. Length 8 mm cinctipes No. 22.] HYMENOPTERA OF CONNECTICUT. 57 Femora all in great part black except the posterior pair; body black, with the following parts white: teguls, tro- chanters, femora at apex in front, anterior tibiae and tarsi, knees of the middle and posterior tibiae, a spot on the mid- dle of basal plates, and an interrupted band on fourth abdominal segment; legs, with coxae black, all other parts not named, rufous; antennae with third, fourth, and fifth segments subequal; ocellar basin a broad shallow depres- sion extending from above anterior ocellus to supraclypeal area and not interrupted at middle; median fovea a rounded pit in lower part of ocellar basin; interocellar furrow a fine furrow connecting ocellar basin and ocellar furrow; saw-guides with upper and lower margins straight, obliquely truncate, and roundly pointed at apex. Length 7-9 mm gillettii *E. apertus Norton. Connectict:t (E. N.) ; Putnam, 12 July 1905 (H. L. V.) ; Thompson (A. P. Morse). E, inornatus Say. Connecticut (E. N.) ; Putnam, 12 July, 1905, Hartford, 20 May, 1904 (H. L. V.) ; New Haven, 19 July, 1905 (B. H. W.) ; Wallingford, 7 June, 1910 (W. E. B.). *E. mellipes Norton. Howard, Insect Book, PI. xiv, Fig. 3. Connecticut (E. N.) ; New Haven, 24 May, 1905 (W. E. B.), 4 July, 1905 (H. L.V.). E. cinctipes Norton. Howard, Insect Book, PI. xiv, Fig. 8. Larva feeds upon rose. Connecticut (E. N.). E. gillettii MacGillivray, Larva feeds on strawberry. Parataxonus MacGillivray. P. multicolor (Norton). Taxonus multicolor Norton. Black, with the following parts yellowish white: clypeus, labrum, a spot in front and between the bases of antennse, posterior and inner orbits, tegulae, collar, an oblique band or spot on pleurae, and legs ; abdomen with a row of elongate, ovate, reddish yellow spots on each side of meson, in some individuals becoming so prominent as to cover the entire abdomen except a trapezoidal or triangular black spot on the middle of each segment ; median fovfa and ocellar basin continuous. Length 7-8 mm. Larva feeds on white and yellow birch. Hamden, 14 June, 1911 (B. H. W.) ; New Haven, 26 May, 1911 (A. B. C). 58 COXNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. Polytaxonus MacGillivray. °P. robustus (Provancher). Taxonus rohustus Provancher. Black, with the following parts white: labrum, mandibles, collar, tegulae, apices of coxae, costa, and apical two-thirds of stigma ; with the following parts rufous : legs, except coxae, tarsi, and apex of posterior tibiae, and a band covering abdominal segments two to five; median fovea large, distinct, extending nearly to median ocellus, ocellar basin not depressed; third seg- ment of antennae very slightly longer than fourth. Length 8 mm. Eriocampa Hartig, *E. rotunda (Norton). Sciapteryx rotundus Norton. Black, with legs, except coxae and apices of middle and pos- terior femora and posterior tibiae and tarsi, yellowish; head and thorax strongly punctate; frontal area prominent; third segment of antennae almost as long as fourth and fifth together; wings hyaline with an indistinct fascia beneath stigma. Farmington (E. N.). Pseudosiobla Ashmead. °P. excavata (Norton). Siobia excavata Norton. Tegulae black; body black, with the following parts yellow: first, second, and base of third segment of antennae, collar, a quadrangular spot on pronotum below tegulae, cenchri, basal plates, trochanters, front femora except a dusky spot at base, their tibiae and tarsi, middle legs beyond the middle of femora, a ring at the base of the posterior femora, basal two-thirds of tibiae, and the greater part of the metatarsus ; first abdominal segment yel- lowish; wings slightly infuscated. Length lo mm. Larva feeds on button-bush. °P. robusta (Kirby). Siobia robusta Kirby. Tegulae rufous ; body black, with the following parts rufous or yellowish rufous : the first, second, and base of third segment of antennae, metathorax, basal plates, first abdominal segment, legs in part, except where marked with black as in preceding species, and costa and stigma; labrum, collar, area on pronotum below tegulae, and tibiae yellow; wings strongly infuscated. Length 13 mm. No. 22.] HYMENOPTERA OF CONNECTICUT. 59 Monosoma MacGillivray. *M. inferentia (Xorton). Pcecilostoma inferentia Norton. Female rufous, with the following parts black : head except clypeus and labrum, antennse, metathorax and saw-guides ; with the following parts white : labrum, tegulse, collar, and a fine line on the apex of each abdominal segment ; third segment of antennse as long as fourth and fifth together ; median fovea and ocellar basin continuous. Male differs in having head, thorax, and ab- domen black, and legs dark rufo-fuscous. Length 8 mm. Larva feeds on alder. Farmington (E. N.). Macremphytus MacGillivray, Key to Species. 1. Antennse either black or rufous at base and white at apex, or entirely black 2 Antennae with four basal segments rufous and five apical seg- ments black; body in female rufous, with the following parts white: labrum, apices of coxae, trochanters, a band at the base of tibiae, metatarsi in part, and basal half of stigma; with the following parts black: five apical seg- ments of antennae, antennal furrow and ocellar basin, lateral portion in part and ventral portion of prothorax, lateral lobes of mesonotum, metathorax in part, coxae, basal half of anterior and middle femora, the posterior femora, and the apex of posterior tibiae; antennas with third seg- ment longer than fourth, fourth and fifth subequal; head with the ridges forming the side of ocellar basin parallel, and with the area between lateral ocelli distinctly depress- ed; postocellar area without a furrow; saw-guides straight above and gradually sloping toward the apex where they are obliquely rounded to a point above. Male differs in having the greater part of head and thorax black and the greater part of legs beyond coxae white or rufous. Length, 8-10 mm semicomis 2. Antennal furrow not as deep opposite the anterior ocellus as elsewhere, and with a supernumerary furrow extending obliquely from the antennal furrow toward the eye 3 Antennal furrow of the same depth throughout and with- out an oblique supernumerary furrow 4 3. Thorax in great part black with rufous markings; head with the raised area between lateral ocelli flat and broken at center by a line-like furrow; ocellar furrow distinct; ocel- 6o CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. lar basin shallow, not well defined except near anterior ocellus, where the raised ridges are marked by a flat angu- lar ridge extending back of anterior ocellus, forming the apex of a triangle; antennae with third and fourth seg- ments subequal, fifth shorter; saw-guides narrow, gradually- sloping to the apex above and convexly below t,o a rounded point; body rufous, with the following parts white: antennal segments six to nine, labrum, tegulse, basal half of stigma, trochanters, and tarsi; with the following parts black: antennal segments three to five, vertex and front in great part, clypeus, thorax except scutellum, basal plates, coxae, and apical half of posterior femora. Length lo mm. versicolor Thorax in great part rufous with black markings; head with the raised area between lateral ocelli flat and broken at center by a line-like furrow; ocellar furrow distinct; ocel- lar basin shallow, but with distinct walls, especially heavy near anterior ocellus, and only faintly marked by the shelf extending around anterior ocellus; antennce with third segment slightly longer than fourth and fourth slightly longer than fifth; saw-guides broad, slightly sloping above, the lower margin sloping and rounded abruptly, obliquely truncated at apex; body rufous, with the following parts white: antennal segments six to nine, labrum, tegulae, apices of coxae, trochanters, and tarsi; with the following parts black: antennal segments four and five, postocellar area, prothorax except collar, lateral lobes of mesonotum, pectus broadly, coxae, apex of middle and posterior tibis, and apex of saw-guides. Length 14 mm testaceus 4. Body color in general rufous; area between posterior ocelli divided by a deep, angular furrow; ocellar furrow wanting or indistinct; ocellar basin deep with heavy walls, walls converging at middle, constricting the ocellar basin, furrow extending around the anterior ocellus with rounded sides and somewhat indistinct; antennae with segments broad and flat, third and fourth subequal and very slightly longer than fifth; saw-guides with the upper and lower margins slightly converging, obliquely truncated at apex, and bluntly rounded to a point above; body with the following parts white: antennal segments six to nine, labrum, tegulae, scutellum, trochanters, base of posterior femora, and tarsi; with the following parts black: antennal segments four and five, postocellar area, thorax except the parts named and median lobe of mesonotum, bases of the anterior and middle femora, apical half of the posterior femora, and apex of posterior tibiae. Length 10-15 rnTi varianus No. 22.] HYMENOPTERA OF CONNECTICUT. 6l Body color in general black; area between posterior ocelli divided by a deep angular furrow; ocellar furrow distinct; ocellar basin deep with heavy walls and almost straight, the furrow extending around anterior ocellus with the sides angular and sharplj' defined; antennae with segments broad, segments three to five subequal in length; saw- guides with the upper margin straight and the lower margin convexly sloping to a point at apex above; body black, with the following parts white: antennal segments six to nine, labrum, trochanters, anterior and middle tibiae, base of posterior tibiae, and tarsi. Length 14-16 mm. tarsatus M. semicornis (Say). Connecticut (E. N.). °M. versicolor (Norton). Larva feeds on Cortms. °M. testaceus Norton. *M. varianus (Norton). Howard, Insect Book, PI. xiii, Fig. 10. Larva feeds on Cornus. Farmington (E .N.). M. tarsatus (Say). Howard, Insect Book, PI. xiii, Fig. 6. Larva feeds on Cornus. Connecticut (E. N.). Strongylogastroidea Ashmead. Key to Species. 1. Antennae in part pale 2 Antennae entirely black g 2. Antennae pale at apex and frequently also at base 3 Antennae pale at base only 8 3. Head in great part pale 4 Head in great part black 7 4. Posterior femora black; antennae black at base; body black, with the following parts white: clypeus, labrum, four apical segments of antennae, tegulae, a very narrow line on collar, posterior coxae in great part, trochanters, and scutellum; with the following parts rufous: head with the exception of ocellar and postocellar areas and lower half of antennal furrow, prothorax at sides, median lobe of mesonotum, an irregular spot on mesopleurae, abdomen except saw-guides, front and middle legs beyond middle of femora, and poste- rior tibiae and tarsi; anterior ocellus situated in front of a distinct angular diverging ridge; saw-guides with the upper margin straight, the lower margin semi-straight, rounded, and obliquely truncate and pointed at apex. Length 11 mm. spiculata Posterior femora rufous, at most only with a ring at apex; antennae usually rufous at base 5 62 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [BuU. 5. Mesonotum with median lobe rufous 6 Mesonotum with median lobe black; body in female rufous, with the following parts white: clypeus, labrum, antennal segments six to nine, a narrow line on collar, the V-spot of the mesonotum, a spot beneath anterior wings, scutellum, postscutellum; coxae and trochanters white, shading to rufous; with the following parts black: postocellar area, an irregular spot at base of clypeus, ventral part of prothorax, mesothorax except parts named and a large spot on pleurae, and metathorax; saw-guides with their upper and lower margins subparallel, slightly convex, and rounded, squarely truncate at apex. Male has basal segments of antennae rufous above and pleurae almost entirely rufous. Length 1 1 mm mellosa 6. Female with saw-guides concave above, convex below, and the apex almost squarely truncate; body rufous with the following parts white: narrow line on collar, scutellum, postscutellum, apices of coxas, and trochanters; with the following parts black: spot surrounding ocelli, a small spot on the middle of postocellar area, lateral lobes of mesonotum, prothorax in great part, pectus, and bases of coxae confusa Female with saw-guides straight or slightly convex above, convex below, and gradually rounded to a blunt point at apex; body rufous, with the following parts white: clypeus, labrum, antennal segments six to nine, usually a fine line on collar, scutellum, and postscutellum; with the following parts black: antennal segments four to six, postocellar area sometimes, lateral lobes of mesonotum, metathorax, ven- tral part of prothorax, pectus, coxae, trochanters in part, saw-guides, and a ring on the apex of posterior femora; amount of black extremely variable, in some specimens entire head, metathorax, prothorax, and entire legs rufous with black lines on sutures. Length iimm terminalis 7. Eyes in great part margined with white; body in female black, with the following parts white: clypeus, labrum, antennal segments six to nine, outer orbits, inner orbits, genae, supraclypeal area, posterior margin of head, tegulas, collar, V-spot, a spot beneath each wing, a line or spot on pleurae, scutellum and postscutellum, coxae at side, and trochanters; the following parts rufous: abdomen including basal plates, and legs beyond trochanters; third segment of antennae longer than fourth; saw-guides with the upper and lower margins parallel and broadly truncately rounded at apex. Male differs only in having the white more pro- nounced on center of thorax. Length 11 mm pallidicomis No. 22.] HYMENOPTERA OF CONNECTICUT. 63 Eyes never margined with white; body in female black, with the following parts white: antennal segments six to nine, clypeus, labrum, a fine line sometimes on collar, scutellum and postscutellum, apices of coxae, and trochanters ; with the following parts rufous: tegulse, wings at base, abdomen including basal plates, and legs beyond trochanters except a ring on the apex of posterior femora; third segment of antennae longer than fourth; saw-guides with the upper margin straight, lower margin convex, and squarely trun- * cated at apex; normal individuals have head entirely black, except as specified above, but many specimens have more or less rufous on the head, and in some individuals head is almost entirely rufous. Male differs only in having apex of abdomen washed with black. Length g-ii mm apicalis 8. Pleurae entirely black; body in female black, with the follow- ing parts rufous: clypeus, labrum, three or four basal seg- ments of antennae, collar, tegulas, basal portion of wings, legs beyond apices of trochanters, and abdomen beyond basal plates; third segment of antennae longer than fourth; saw-guides convex above and below and obliquely rounded to a point at apex above. Male differs in having labrum, clypeus, collar, tegulae, and bases of legs whitish, and apex of the abdomen infuscated with black. Length 9 mm., .epicera Pleurae entirely rufous; body black, with the following parts white: clypeus, labrum, antennal segments one and two, tegulae, scutellum, costa, coxae, and trochanters; with the following parts rufous: prothorax, mesopleurae, metapleuras in part, abdomen, and legs beyond trochanters except a ring on the apex of posterior femora; third segment of antennae as long as fourth and fifth together; saw-guides straight above, convex below, and obliquely roundly trun- cated at apex. Length 9 mm pallipes 9. Coxae entirely white lO Cox^e entirely black except sometimes at apex; antennae with second segment distinctly longer than broad; body black, with the following parts rufous : labrum, tegulae, base of wings, legs beyond coxae except posterior tarsi, and abdom- inal segments two to five; third segment of antennae longer than fourth; mesopleurae densely, finely punctate; saw- guides with the upper and lower margins parallel and roundly truncated at apex. Length 10 mm rufocincta 10. Scutellum black; body black, with the following parts white: clypeus, labrum, a fine line on collar, teguljE, coxae, tro- chanters, costa, and base of stigma; with the following parts rufous: legs beyond trochanters except a ring on the apex of posterior femora and posterior tarsi, and abdominal segments two, three, and four; third segment of antennae 64 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. longer than fourth; saw-guides with the upper and lower margins parallel and obliquely rounded to a point at the apex above. Length 8 mm unicincta Scutellum white; body black, with the following parts white: clypeus, labrum, collar in great part, postscutellum, coxae, and trochanters; with the following parts rufous: legs beyond trochanters, and abdomen beyond basal plates ex- cept saw-guides; third segment of antennae nearly as long as fourth and fifth together; saw-guides with the upper and lower margins parallel and obliquely truncated at apex. Length 9 mm proxima °S. spiculata MacGillivray. S. mellosa (Norton). Strongylogaster mellosus Norton. Connecticut (E. N.) ; New Haven, i June, 191 1, 30 May, 1911, Lyme, 20 Aug., 1910 (B. H. W.). °S. confusa MacGillivray. S. terminalis (Say). Howard, Insect Book, PI. xiv, Fig. 30. Connecticut (E. N.) ; New Haven, (A. E. V.) ; New Haven, 17 June, 191 1. °S. pallidicornis (Norton). S. apicalis (Say). Howard, Insect Book, PI. xii, Fig. 11. Larva feeds on Rubus. Connecticut (E. N.) ; Farmington (H. L. V.) ; Westville, 2 June, 1908; New Haven (A. E. V.) ; 3 June, 1908 (B. H. W.) ; Middlebury, 26 May, 1911 (W. E. B.). S. epicera (Say). Connecticut (E. N.). °S. pampas (Say). *S. rufocincta (Norton). Howard, Insect Book, PI. xiv, Fig. 26. Connecticut (E. N.) ; Torrington, 7 July, 1905, Prospect, 15 August, 1906 (W. E. B.) ; New Haven, 26 May, 1904 (H. L. v.), 12 July, 1905 (B. H. W.). *S. unicincta (Norton), Taxonus unicinctus Norton. Farm- ington (E. N.). °S. proxima (Provancher). Strongylogaster proximus Prov- ancher. Dimorphopteryx Ashmead. *D. pinguis (Norton). Strongylogaster pinguis Norton. Body in female black, with the following parts rufous: clypeus, labrum sometimes, tegulae, scutellum and postscutel- No. 22.] HYMENOPTERA OF CONNECTICUT. 65 lum (sometimes white), legs beyond apices of coxse except a ring on apices of posterior femora and tibise, and abdominal segments one to four, with sometimes a spot on the disk of fifth ; antennae varying from yellow to rufous and black ; third segment almost twice as long as fourth ; segments beyond third distinctly serrate ; head and thorax deeply, closely punctate ; saw-guides with upper and lower margins parallel and oblique- ly roundly truncated at apex. Male differs in having scutellum and postscutellum black and entire abdomen beyond basal plates rufous or infuscated and almost entirely black. Length 9-1 1 mm. Larva feeds on birch, basswood, Amelanchier, and maple. Connecticut (E. N.). A larva feeding upon sweet cherry at New Haven was identified as this species by Dyar. The same species was received from Harwinton, 16 August, 1902. New Britain, 4 August, 1906 (W, E. B.). Selandriin/e Key to Genera. 1. Front wings with first abscissa of Cui distinctly longer than free part of M4; costa dilated at apex 2 Front wings with first abscissa of Cui subequal in length to free part of M4; costa not dilated at apex 4 2. Claws simple, without a tooth at base; front wings with media strongly angularly bent at base Selandria p. 66 Claws with a minute erect tooth at base; front wings with media not strongly angularly bent at base 3 3. First anal cell of hind wings closed at wing margin and there- fore distinctly longer than the cell in front of it; front wings with media coalescing with radial sector for a short distance Polyselandria p. 66 First anal cell of hind wings distinctly petiolate and there- fore shorter than the cell in front of it; front wings with media separating from radius distinctly before origin of radial sector Pseudoselandria p. 66 4. .Claws strongly appendiculately dentate Stromboceros Claws not appendiculately dentate , 5 5. Claws with a minute erect tooth at base Thrinax p. 67 Claws strongly bifurcate at apex Strongylogaster p. 67 66 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. Selandria Leach. *S. flavipes Norton. Black, with tegulse, collar, and legs beyond the apices of coxae yellowish-white; third segment of antennae longer than fourth ; ocellar basin and median fovea distinct and not connected ; tergum of abdomen sometimes reddish; wings yellowish hyaline. Length 5-7 mm. Larva feeds on Pteris aquilina. Connecticut (E, N.) ; New Haven, 27 July, 1904 (P. L. B.), 4 July, 1905 (H. L. v.), 31 July, 1910 (B. H. W.) ; Branford, 28 July, 1905, Thompson, 11 July 1905 (H. L. V.) ; Orange, 21 May, 191 1 (A. B. C). Polyselandria MacGillivray. °P. decolorata (Cresson). Pleurae wholly shining black ; body black, with tegulae, collar, labrum, and legs beyond apices of the coxae yellowish white ; third segment of the antennae a little longer than the fourth ; wings usually strongly infuscated on the basal two-thirds ; ocellar basin and median fovea distinct ; tergum of the abdomen usually rufous, sometimes entirely black. Length 5-7 mm. °P. floridana (MacGillivray). Pleurae shining black with a large, round, yellowish white spot at middle; body black, with clypeus, labrum, tegulae, collar, and legs beyond the coxae yellowish white; posterior tarsi infus- cated at apex ; third segment of the antennae very slightly longer than the fourth ; wings strongly infuscated. Length 5 mm. Pseudoselandria MacGillivray. °P. oxalata MacGillivray. Black, with the following parts whitish : two basal segments of the antennae, the labrum, the clypeus, the collar broadly, the tegulae, the upper half or more of the pleurae, the legs, the wings at base, and the abdomen except the saw-guides ; median fovea deep, ovate, transverse; ocellar basin distinct; third segment of the antennae as long as the fourth and fifth together ; wings hya- line, with the apex of the radius strongly dilated and black. Length 7 mm. No. 22.] HYMENOPTERA OF CONNECTICUT. 6/ Thrinax Konow. T. impressatus (Provancher). Strongylogaster impressatus Provancher. Black, with the following parts rufous ; the tegulse, a triangular spot on the collar, the legs beyond the apices of the coxae, the costa, and the basal third of the stigma, the disk of abdominal segments two, three, and four, wholly or in part, or with the apical half of the first and all of the three following segments ; median fovea large, transverse, ovate ; ©cellar basin indistinct except adjacent to the anterior ocellus. Length 7-10 mm. New Haven (B. H. W.). Strongylogaster Dahlbom. Key to Species. 1. Antennas dark rufous, with the basal segments red; body black, with the following parts rufous: upper half of orbits, middle of the pleurae, abdomen, and legs in part; with fol- lowing parts yellow: spot between and beneath the anten- nae, lower half of the orbits, labrum, clypeus, collar, scutel- lum, and a spot at the base of coxae; wings infuscated at middle. Length 10 mm rufescens Antennae entirely black 2 2. Thorax except collar and tegulae rufous, abdomen rufous in female and black in male; remainder of body black; third and fourth segments of antennje subequal; median fovea and ocellar basin wanting; head densely punctate; wings strongly infuscated. Length 8 mm unicus Thorax either entirely black, or black with collar and teg- ulae pale 3 3. Abdomen entirely pale beyond first segment 4 Abdomen entirely or in part black beyond first segment 5 4. Tegulae and collar black; body and legs black, with abdomen and anterior tibiae rufous; wings strongly infuscated; third and fourth segments of antennae subequal; median fovea indistinct; ocellar basin narrow, trough-like; head deeply, sparsely punctate. Length 7-8 mm tacitus Tegulae and large spot on collar yellow; body black, with abdomen beyond first segment and legs brownish; wings hyaline, costa and stigma in great ' part brownish; third and fourth segments of antennae subequal; head finely, sparsely punctate. Length 9 mm longulus 5. Abdomen with basal half of each segment straw-yellow and apical half black; wings hyaline, stigma and costa pale; antennae v/ith third segment longer than fourth; head 68 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. coarsely punctate; legs black, with tips of femora, tibiae, and tarsi pale reddish. Length 9 mm . . multicinctus Abdomen never with basal half of each segment pale and apical half black 6 6. Abdomen with basal half of segments black and apical half whitish; antennae with third and fourth segments subequal; head rough, and densely finely punctate; body black, with tegulae, a broad spot on collar, and legs beyond apices of femora, except apices of tarsi, yellowish white; wings hya- line, costa and apex of stigma pale; median fovea and ocel- lar basin fairly distinct. Length lo-ii mm annulosus Abdomen either entirely black, or abdominal segments with a narrow pale line; antennas with third and fourth segments subequal; head very finely punctate; body black, with tegu- las, collar, labrum, anterior and middle tibiae and tarsi, and basal half of posterior tarsi, yellowish white; coxae, tro- chanters, and femur rufous, remainder of legs black; me- dian fovea and ocellar basin distinct. Length 10 mm. . .politus °S. rufescens Norton. °S. unicus Norton. S. tacitus Say. Connecticut (E. N.) ; Cheshire, 8 July, 1904, Thompson, 11 July, 1904 (H. L. V. ); New Haven, 9 June, 1905, 31 July, 1910 (B. H. W.), 28 July, 1911 (A. B. C.).; Hamden, 25 May, 191 1, Lyme, 29 May, 1910 (A. B. C). °S. longulus Norton. °S. multicinctus Norton. °S. annulosus Norton. Larva feeds on Pteris aquilina. °S. politus Provancher. DOLERINAE. Key to Genera. Genae broad, their width as great as the length of first segment of antennae, eyes therefore distant from base of mandibles; eyes round or short oval in outline, inner margin always convex Dolerus p. 69 Genae narrow, their width distinctly less than the length of first segment of antennae, eyes therefore adjacent to base of mandibles; eyes elongate and emarginate on their inner margin Loderus p. 76 No. 22.1 HYMENOPTERA OF CONNECTICUT. 69 Dolerus Jurine. Key to Species. 1. Surface of apex of scutellum entirely smooth 2 Surface of apex of scutellum wholly or in part punctate or striate 14 2. Mesouotum with median lobe either finely punctate or almost impunctate at middle, and with large, coarse punctures or rugosities at sides 3 Mesonotum with median lobe uniformly punctate at middle and at sides, at least never with a band of large punctures on each side 11 3. Pectus with three longitudinal rows of punctures that are distinctly larger than the adjacent punctures 4 Pectus not with three rows of larger punctures; if any of the punctures are larger than others, then not arranged in rows 10 4. Vertical furrow with its lateral margin continued as an ele- vated area to upper corner of eye 5 Vertical furrow with its lateral margin not extended as an elevated area below lateral ocelli 7 5. Head with a distinct carina between posterior orbits and occiput; postocellar area and upper orbits uniformly punc- tate; median lobe of mesonotum more densely punctate than lateral lobes; lateral lobes and the scutellum uni- formly punctate; body dull black; wings fuliginous. Length 10-12 mm sericeus Head not with a distinct carina between posterior orbits and occiput; postocellar area with fewer, smaller punc- tures than upper orbits 6 6. Scutellum and infiexed and dorsal portions of lateral lobes of mesonotum with the punctuation similar in size and arrangement; vertical furrows distinct and sharply cut, with an impunctate area on the posterior orbits; median lobe of mesonotum more densely punctate than lateral lobes; body dull black; wings infuscated, especially around the margins. Length 10 mm parasericeus Scutellum and infiexed portion of mesonotum with punc- tuation larger and distinctly denser than on dorsal surface; vertical furrows distant and sharply cut, with an impunc- tate area on upper orbits; median lobe of mesonotum distinctly more densely punctate than lateral* lobes; body dull black; wings fuliginous. Length 12 mm neosericeus 7. Punctures on scutellum more sparse and twice as large as those of lateral lobes of mesonotum; vertical furrows deep with sloping sides; postocellar area more finely punc- tate than posterior orbits; head with a carina between occi- 70 CONNECTICUT GEOL. AND NAT, HIST. SURVEY. [Bull. put and posterior orbits; body dull black; wings infus- cated. Length ii mm polysericeus Punctures on scutellum similar in size and arrangement to those of lateral lobes of mesonotum 8 8. Vertical furrows obsolete; mesonotum with impunctate area on lateral surface of lateral lobes extending to median lobes; postocellar area more closely punctate than pos- terior orbits; posterior orbits not with a ridge extending from antennal furrow to eye; median lobe of mesonotum and scutellum more deeply and distinctly punctate than lateral lobes; wings fuliginous, veins and stigma black; body black. Length lo mm tectus Vertical furrows deep and distinct 9 9. Mesonotum with the impunctate area on lateral surface of lateral lobes not extending to median lobe; postocellar area and posterior orbits uniformly punctate; posterior orbits with a fine ridge extending from posterior end of antennal furrow to eye; median lobe of mesonotum finely, densely punctate; body uniformly black; wings fuliginous. Length 14 mm colosericeus Mesonotum with impunctate area on lateral surface of lat- eral lobes extending to median lobe; the postocellar area more finely punctate than posterior orbits; posterior orbits not with a fine ridge extending from antennal furrow to eye; median lobe of mesonotum finely, densely punctate; body uniformly black; wings fuliginous. Length ID mm. monosericeus ID. Vertical furrows continued as broad distinct furrows to near middle of eyes; mesonotum with impunctate area on lateral surface of lateral lobes not extending to median lobe; postocellar area with many fine punctures, and posterior orbits with adjacent large punctures, subrugose; body en- tirely black, except abdominal segments one to five which are rufous; wings infuscated on apical half. Length 12 mm apriloides Vertical furrows not continued below lateral ocelli; mes- onotum with the impunctate area of lateral surface of lat- eral lobes extending to median lobe; postocellar area and posterior orbits finely punctate, postocellar area more densely; body black, with abdominal segments one to five rufous; wings hyaline, smoky toward the apex. Length 1 1 mm. neoaprilis II. Head with a distinct carina between occiput and posterior orbits 12 Head not with a distinct carina between occiput and posterior orbits 13 No. 22.] HYMENOPTERA OF CONNECTICUT. 7I 12. Mesonotum with median lobe densely punctate and lateral lobes almost smooth; postocellar area densely, finely punc- tate, and posterior orbits almost smooth; vertical furrows sharp and distinctly cut; body black, with collar, tegulse, abdominal segments one to five, and legs beyond the mid- dle of coxae, rufous; wings slightly infuscated. Length 8 mm minusculus Mesonotum with median lobe not more densely punctate than lateral lobes; postocellar area and posterior orbits uniformly punctate; body black, with pronotum in front irregularly, abdominal segments one to four, segment five at base, apical half of front coxae, front femora and tibiae, middle femora and tibiae, except a black spot above at apex, and knees in part, rufous; tegulae white; wings hya- line. Length 8 mm luctatus 13. Mesonotum with the impunctate area of lateral surface of lat- eral lobes not extending to median lobe; vertical furrows linear, definite, sharply cut, three times as long as broad; head with a transverse furrow extending between eyes and behind ocelli; head uniformly punctate; body black, with pronotum entirely, median lobe of mesonotum, and upper half of mesoepimeron, rufous; wings slightly infuscated. Length 10 mm neocoUaris Mesonotum with the impunctate area of lateral surface of lateral lobes extending distinctly to median lobe; verti- cal furrows punctiform, indefinite, as broad as long; head uniformly, finely punctate; body rufous, with head, anten- nae, lateral lobes of mesonotum, scutellum at middle, pec- tus, saw-guides, stigma on its outer half, legs, except knees of front pair, black; wings infuscated at middle. Length 9 mm icterus 14. Surface of apex of scutellum wholly or in part punctate 15 Surface of apex of scutellum wholly or in part striate 16 15. Surface of apex of scutellum uniformly finely punctate; verti- cal furrows distinct; postocellar area and posterior orbits uniformly, closely punctate; lateral lobes of mesonotum more finely and densely punctate than the median lobe or scutellum; body black, with pronotum, median lobe of mesonotum, and upper half of pleurae rufous; wings sub- hyaline, clouded at apex. Length 12 mm refugus Surface of apex of scutellum longitudinally striate at middle and punctate at sides; vertical furrows narrow, line-like, distinct; postocellar area more finely and densely punctate than posterior orbits; median lobe of mesonotum and scutellum finely densely punctate, lateral lobes smooth with distant punctures; body black, with abdominal seg- 72 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. ments one to five rufous; wings yellowish, veins black. Length 9 mm inspectus 16. Surface of apex of scutellum not striate over its entire sur- face u 17 Surface of apex of scutellum striate over its entire surface. ... 19 17. Mesonotum with the median lobe with a row of punctures on each side that are four or five times as large as the adjacent punctures; postocellar area and posterior orbits uniformly punctate; sides of antennal furrow behind ocelli continued as a ridge to eyes; body black, with a nar- row margin on pronotum, abdominal segments one to four and the basal half of fifth segment, trochanters in part, femora, except a black spot at apex above, and knees, rufous ; wings hyaline. Length 8 mm apricus Mesonotum with median lobe not with a row of large punc- tures on each side , 18 18. Antennal furrow an elongate, punctiform indentation not ex- tending below lateral ocelli; postocellar area and posterior orbits uniformly punctate; mesonotum and scutellum mod- erately, densely, finely punctate; body rufous, with head, antennse, lateral lobes of mesonotum, metanotum, scutel- lum except at sides, postscutellum, pectus, legs, and saw- guides black; wings fuliginous with clearer lines. Length 1 1 mm bicolor Antennal furrow extending as a narrow, depressed line from occiput below lateral ocelli; postocellar area and posterior orbits with punctures of the same size but closer together on postocellar area; lateral lobes of mesonotum not so densely punctate as median lobe or scutellum; body black, with abdominal segments one to four, and tibiae, at least on their basal half, rufous. Length 7 mm cohassus 19. Surface of apex of scutellum longitudinally striate 20 Surface of apex of scutellum transversely striate 24 20. Head viewed from above with a deep transverse furrow, broadly rounded at bottom, extending from vertical fur- row to beyond hind angle of eye 21 Head viewed from above not with a deep transverse furrow extending from vertical furrow to eye, sometimes indicated for a part of the distance 23 21. Vertical furrows punctiform or wanting; postocellar area more densely punctate than posterior orbits or region ad- jacent to vertical furrows; vertex with a small impunctate area adjacent to vertical furrows; scutellum more densely punctate than lobes of mesonotum; body black, with pro- thorax, tegulse, median lobe of mesonotum, and abdominal segments one to six, rufous. Length 9 mm inspiratus Vertical furrows linear and distinct 22 No. 22.] HYMENOPTERA OF CONNECTICUT. 73 22. Head with postocellar area more densely punctate than sides of vertex; body black, with median lobe of mesonotum sometimes knees, and abdominal segments one to five, rufous; wings hyaline, veins black, stigma paler below. Length 8 mm conjugatus Head with the postocellar area and sides of the vertex uni- formly, finely punctate; body black, with abdominal seg- ments one to five and basal half of sixth, rufous; wings hyaline, veins and stigma black. Length 10 mm dysponis 23. Mesonotum with impunctate area on sides of lateral lobes not extending to margin of median lobe; head with a fine ridge extending from eye obliquely toward occiput; median lobe of mesonotum more densely punctate than lateral lobes; body black, with the prothorax, tegulse, and abdom- inal segments one to five, rufous; wings very slightly in- fuscated, veins and stigma black. Length 8 mm plesius Mesonotum with impunctate area on sides of lateral lobes extending broadly to margin of median lobe; head not with a fine ridge extending from eye toward occiput; mesonotum finely, densely punctate; body black, with pro- thorax, tegulae, median lobe of mesonotum, upper half of pleurae, and abdomen except saw-guides, rufous; wings infuscated, veins black. Length 9 mm agcistus 24. Mesonotum with impunctate area on sides of lateral lobes distinct and extending broadly to median lobe 25 Mesonotum with impunctate area on sides of lateral lobes almost entirely wanting, or, at least always separated from median lobe by a narrow punctate area 26 25. Antennal furrows subobsolete above base of antennae or with minute lateral foveae; body in female blue, with prono- tum, tegulas, lobes of mesonotum, except a blue spot on middle of median lobe, rufous; wings uniformly infuscated, veins black; male differs in having body wholly blue. Length 10 mm unicolor Antennal furrows extending as deep linear furrows above base of antennae to near middle of face; body in female dull black, with pronotum, lobes of mesonotum, and usually upper anterior corner of pleura, rufous; wings uniformly infuscated; male differs in having body entirely dull black. Length 10 mm collaris 26. Head when viewed from above with a transverse furrow ex- tending behind eyes and ocelli 27 Head when viewed from above with a transverse furrow extending across head behind eyes, interrupted by an oblique ridge extending from postocellar area to upper posterior corner of eye; lateral lobes of mesonotum not so densely punctate on the disk as at sides; body black, with CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [BuU. prothorax for the most part, a spot on each side of me- dian lobe of mesonotum, tegulae, knees, and abdominal segments one to five, rufous; wings yellowish hyaline, paler at base. Length lo mm stugnus Head with a carina behind the eyes between the occiput and posterior orbits 28 Head not with a carina behind the eyes between the occiput and posterior orbits 29 Head with postocellar area more densely punctate than sides of vertex; median third of lateral lobes of mesonotum more densely punctate than its disk; body black, with labrum, prothorax, median lobe of mesonotum, front legs beyond middle of femora, tegulae, and abdominal segments one to six and sometimes part of seventh, rufous; wings hyaline or very slightly infuscated. Length 9 mm similis Head with postocellar area and sides of vertex uniformly densely punctate; median third of lateral lobes of mesono- tum not more densely punctate than its disk; body black, with abdominal segments one to five and usually a part of six, rufous; wings hyaline or very slightly infuscated. Length 9 mm aprilis Vertex adjacent to postocellar area with a small impunctate area; postocellar area as densely punctate as the front; median lobe of mesonotum not so densely punctate as lat- eral lobes; body black, with prothorax, tegulae, median lobe of mesonotum except at middle, and abdominal seg- ments one to five, rufous; wings hj'^aline, veins black, stigma rufous below. Length 7 mm acritus Vertex without an impunctate area adjacent to postocellar area 30 Median lobe of mesonotum finely, densely punctate, lateral lobes not so closely, but deeply punctate; body dull black, with abdomen wholly rufous; third segment of antennae but little longer than fourth; wings infuscated, veins black, stigma black, paler on hind margin. Length 8 inm. abdominalis Median lobe of mesonotum with large, distant punctures, lateral lobes with distant shallow punctures, appearing al- most smooth; scutellum more closely and finely punctate than lobes of mesonotum; front densely, compactly punc- tate, posterior orbits coarsely punctate, not so densely adjacent to the postocellar area as distant from it; postocel- lar area coarsely punctate, more densely than the portion of the posterior orbits adjacent to it; body black, with pro- thorax, tegulae, a spot on each side of median lobe of mesonotum, lateral lobes of mesonotum, upper half of No. 22.] HYMENOPTERA OF CONNECTICUT. 75 pleurae, basal plates, and abdomen except the saw-guides, rufous. Length 1 1 mm versus D. sericeus Say. Howard, Insect Book, PI. xiii, Fig. 27. Connecticut (E. N.) ; Stonington, 26 April, 1907 (W. E. B.). °D. parasericeus MacGillivray. °D. neosericeus MacGillivray. °D. polysericeus, MacGillivray. *D. tectus MacGillivray. Nev^ Haven, 4 May, 1904 (H. L.V.). D. colosericeus MacGillivray. New Haven, 4 May, 1904 (H. L. v.). D. monosericeus MacGillivray. New Haven, 4 May, 1904 (H. L. v.). °D. apriloides MacGillivray. °D. neoaprilis MacGillivray. °D. minusculus MacGillivray. °D. luctatus MacGillivray. °D. neocollaris MacGillivray. °D. icterus MacGillivray. D. refugus MacGillivray. New Haven, 4 May, 1904 (H. L. v.). °D. inspectus MacGillivray. D. apricus (Norton). Connecticut (E. N.) ; Salisbury, 30 August, 1904, Torrington, 7 July, 1905 (W. E. B.). D. bicolor Beauvois. Connecticut (E. N.) ; New Haven, 4 May, 1904 (H. L. V. ) ; Lyme, 2 April, 1910, 14 May, 191 1, Orange, 21 May, 191 1 (A. B. C). °D. cohaesus MacGillivray. *D. inspiratus MacGillivray. Hamden, 14 July, 191 1 (B. H. W.) ; New Haven, 30 May, 30 July, 191 1 (A. B. C). D. conjugatus MacGillivray. Thompson, 11 July, 1905 (H. L. V.) ; New Haven, 15 May, 1911 (A. B. C). D. dysponis MacGillivray, New Haven, 19 April, 1910 (B. H. W.). °D. plesius MacGillivray. 76 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. °D. agcistus MacGillivray. D. unicolor Beauvois. Female, D. arvensis Say. Howard, Insect Book, PL xii, Fig. lo. Connecticut (E. N.) ; New Haven, 4, 7 May, 1904 (H. L. V.), 2 May, 1905 (B. H. W.) ; Westville, 22 April, 1905, 16, 25 April, 5 May, 1906, Stonington, 26 April, 17 May, 1907 (W. E. B.) ; Branford, 11 May, 1906 (H. W. W.) ; Westport, 12 April, 1905 (W. E. B.) ; Manchester, i May, 191 1 (B. H. W.) ; Lyme, 2 April, 1910 (A. B. C.) ; Ware- house Point, 21 April, 1910 (W. E. B.). D. collaris Say. Connecticut (E. N.) ; Lyme, 2 April, 1910 (A. B. C). °D. stugnus MacGillivray. *D. similis Norton. Howard, Insect Book, PI. xiv. Fig. 31. Connecticut (E. N.). *D. aprilis (Norton). Howard, Insect Book, PI. xii. Fig. 17. Connecticut (E. N.) : New Haven, 4, 7 May, 1904 (H. L. V.), 15, 17 May, 9 June, 12 July, 1905, 19 April, 1910 (B. H. W.). Occurs throughout the state. °D. acritus MacGillivray. *D, abdominalis (Norton). Connecticut (E. N.) ; New Haven, 4 May, 1904 (H. L. V.), D. versus Norton. New Plaven (A. E. V.). Loderus Konow. *L. albifrons (Norton). Dolerus alhifrons Norton. Howard, Insect Book, PI. xiii. Fig. 20. Surface of the apex of the scutellum very finely striate at base, smooth at apex; head very finely, densely, uniformly punctate, the lower half covered with a dense, white, sericeous pile ; lobes of mesonotum uniformly finely punctate ; body black, with the supra- clypeal area, the clypeus, the labrum, the inner orbits enlarged into a wedge-shaped dilation near the middle of the eye, and the tegulae, white; front and middle legs beyond the trochanters, the tarsi (sometimes infuscated), the posterior trochanters, the poste- rior femora except a ring at apex, and abdominal segments one to four and a part of the fifth, rufous; wings hyaline or slightly infuscated. Length, 8 mm. Connecticut (E. N.) ; Milldale, 21 May, 1906 (B. H. W.). No. 22.] HYMENOPTERA OF CONNECTICUT. 'JJ PhYLLOTOMINtE. Key to Genera. Antennae with second segment about one-half as long as first and about as long as broad; clypeus truncate Endelomyia p. 77 Antennas with second segment subequal in length with first and always much longer than broad; clypeus emarginate. Caliroa p. 77 Endelomyia Ashmead, E. ffithiops (Fabricius). Eriocampoides cethiops Fabricius. Monostegia rosce Harris. Rose Sawfly. Body black, with the front and middle legs below the knees, and the knees of the hind legs, white; a distinct V-shaped fur- row behind the median ocellus, connecting with an indistinct furrow in front of the postocellar area ; pentagonal area entirely wanting ; lateral f oveae minute ; saw-guides straight above, broadly convexly rounded from base to a point at apex above. Larva feeds on various species of Rosa. Length 5 mm. Connecticut (E. N.) ; Branford, 12 May, 1905 (H. W. W.) ; New Haven, 24 May, 1908 (B. H. W.). Caliroa Costa. Key to Species. 1. Clypeus roundly emarginate 2 Clypeus angularly emarginate 8 2. Front wings with radial cross-vein and free part of Rt in- terstitial or nearly so; body black, with front and middle legs below knees white; walls of pentagonal area distinct, a V-shaped furrow behind median ocellus, lateral walls of pentagonal area continued to bases of antennae where they are enlarged and separated by a distinctly and deeply impressed triangular median fovea; saw-guides long and slender, straight above and below, oblique and bluntly rounded at apex; wings more or less infuscated on basal half. Length 6 mm cerasi Front wings with radial cross-vein and free part of R4 dis- tant 3 3. Front distinctly impressed around the median ocellus; V- shaped furrow always more or less indicated 4 Front uniformly flat around the median ocellus, without any indication of a V-shaped furrow 6 4. Supraclypeal area convexly elevated throughout its entire length 5 78 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. Supraclypeal area flat, somewhat elevated adjacent to the median fovea; body black, with front and middle legs below knees, basal half of posterior tibiae, and metatarsi, white; pentagonal area rounded in outline behind, walls low and fading out before; median fovea shaped like an impressed tetrahedron with all its margins broadly rounded; saw- guides retracted, convex below and bluntly rounded to a blunt point; wings infuscated on basal half. Length 6 mm. lorata 5. Postocellar area distinctly broader than long and not strongly convex; body black, with front and middle legs below knees, hind legs with knees, basal half of tibiae, and tarsi more or less, white; pentagonal area angular in outline behind median ocellus, with distinct walls, gradually fad- ing out in front; median fovea shaped like an impressed tetrahedron, the outer margin being rounded; saw-guides convex above and below, gradually rounded to a point at the apex; wings hyaline. Length 4.5 mm lunata Postocellar area about as long as broad and strongly convex; body black, with front and middle legs below knees, basal two-thirds of hind tibiae, and basal three- fourths . of hind metatarsi, white or luteous; pentagonal area angular behind median ocellus, deep and distinctly im- pressed, walls slanting; median fovea deep and strongly impressed, sides parallel, gradually shelving off above; front with deep, round, pit-like lateral fovese not joining the antennal foveae; saw-guides straight above, broadly convexly rounded below to a blunt point at apex above. Length 4-6 mm quercus-alba 6. Front with sides of pentagonal area extending ridge-like to bases of antennae, never mound-like 7 Front with sides of pentagonal area expanded above bases of antennae into mound-like elevations; body black, with front and middle legs below knees, hind tibiae on basal half, and their tarsi in part, white; pentagonal area with all its walls perfectly flat; clypeus deeply emarginate; saw- guides retracted, pointed at apex; wings hyaline. Length 5-5 mm lobata 7. Frontal crest strongly elevated above general level of basin above it; walls of pentagonal area distinct, strongly ex- panded below into a pair of elevated parenthesis-shaped ridges; body black, with legs below knees, except apical half of posterior tibiae, white; antennae with third segment subequal in length to fourth and fifth together; saw-guides with sides parallel, slender, and bluntly rounded at apex; wings infuscated on the basal half. Length 6 mm obsoleta No. 22.] HYMENOPTERA OF CONNECTICUT. 79 Frontal crest not elevated above general level of the basin above it; walls of pentagonal area distinct, but broadly rounded, broadly expanded at their ventral ends, parenthe- sis-shaped, the curve being turned outward, forming a frontal crest not strongly raised above the surface adjacent to it, deeply broken at the middle; body black, with legs below middle of the femora white, more or less fuscous in places; third segment of antennae not as long as fourth and fifth together; wings infuscated. Length 4 mm quercus-coccinea 8. Supraclypeal area broadly convex, not with an elevated ridge at the middle; body black, with front and middle legs beyond knees fuscous white; pentagonal area indefinite, the V-shaped area indicated, lateral ridges continued to bases of antennas; median fovea triangular in outline, with rounded walls; antennas with third segment as long as fourth and fifth together; saw-guides straight on upper and lower margins, obliquely truncated and with a blunt point at the apex above; wings more or less infuscated. Length 5.5 mm fasciata Supraclypeal area elevated at the middle into a prominent carina; body black, with legs beyond knees white; pentag- onal area well defined, with a distinct V-shaped furrow behind the median ocellus; median fovea indefinite, trans- verse; third segment of antennas not as long as fourth and fifth together; saw-guides straight above, slightly convexly rounded, somewhat truncated at apex above; wings hya- line. Length 4.5 mm lata C. cerasi (Linnaeus). Eriocampoides limacina Retzius. Selandria cerasi Peck. Eriocampa cerasi Peck. Pear Slug. Larva is reported as feeding on Pyrns, Pruntis, Rubus, Amyg- dalus, Cratcegus, Betula, and Querciis. Connecticut (E. N.) ; New Haven, 20 June, 1905 (H. L. V.). °C. lorata MacGillivray. °C. lunata MacGillivray. *C. quercus-alba (Norton). Selandria quercus-alba Norton. Monostegia quercus-alba Norton. Larva feeds on white oak. Farmington (E. N.). °C. lobata MacGillivray. *C. obsoleta (Norton). Selandria obsolefa Norton. Larva feeds on wild cherry. Poquonock, New Haven (H. L. V.) ; Branford, 20 May, 1905 (H. W. W.). 8o CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. °C. quercus-coccinea (Dyar). Monostegia quercus-coccinea Dyar. Larva feeds on the leaves of the scarlet oak, Quercus coccinea. *C. fasciata (Norton). Selandria fasciata Norton. Erio- campa fasciata Norton. Larva feeds on oak. New Haven, 26 June, 1905 (H. L. V.). '^C. lata MacGillivray. Tenthredinin^e. Key to Genera. 1. Head broad between the eyes, broader at the antennae than the eyes are long; inner margins of the eyes subparallel. . . 2 Head narrow between the eyes, narrower at the antennae than the length of the eyes; eyes strongly convergent below. ... 8 2. Antennal sockets with their mesal margins not dilated.... 3 Antennal sockets with their mesal margins distinctly dilated 4 3. Anal veins anastomosed for a considerable distance, free part of 2d A wanting Pach5rprotasis p. 81 Anal veins not anastomosed; free part of 2d A present. Lagium p. 81 4. Basal plates divided at the middle by a longitudinal suture. . . 6 Basal plates not divided at the middle 5 5. Malar space distinctly shorter than width of the posterior orbits; hind wings with either free part of R4 or M2 or both present Tenthredopsis p. 82 Malar space subequal in length to width of posterior orbits; hind wings with both the free part of Ri and M2 wanting. Neopus p. 82 6. Clypeus truncate Bivena p. 82 Clypeus distinctly emarginate 7 7. Lateral ocelli above a line drawn between the posterior corners of the eyes; hind wings with free part of R^ and transverse part of M2 wanting Leucopelmonus p. 83 Lateral ocelli below a line drawn between the posterior corners of the eyes; hind wings with free part of R4 and transverse part of M2 present Rhogogastera p. 83 8. Antennal sockets with their mesal margins not dilated, or, if dilated, only slightly so and then not with the area between them deeply hollowed out 9 Antennal sockets with their mesal margins strongly dilated and with the area between them deeply hollowed out; an- tennae never thickened toward apex Tenthredo p. 83 9. Antennae with nine segments 10 Antennae with eight segments Labidia p. 92 No. 22.] HYMENOPTERA OF CONNECTICUT. 8l 10. Hind coxae elongated so that apex of hind femora reaches to or beyond apex of abdomen; middle coxae much smaller than hind coxae, reaching to or slightly beyond proximal end of hind coxae Macrophya p. 92 Hind coxae not elongated, apex of hind femora not reaching to apex of abdomen; middle coxae subequal in size to hind coxae, reaching to and usually beyond middle of hind coxae AUantus p. loi Pachyprotasis Hartig. P. rapae (Linnaeus). Pachyprotasis omega Norton. Synair- ema americana Provancher. Female : body black, with clypeus, labruni, mandibles, postgenae, inner and posterior orbits, antennae at base beneath, V-shaped spot on mesonotun, tegulse, scutellum, postscutellum, plurae, spot at base of hind wings, coxae, trochanters, front and middle femora and tibiae and tarsi beneath, basal half of posterior femora, poste- rior tibiae beneath, and lateral margin of abdomen, white. Male differs in having the white more extended. Length 6-7 mm. Connecticut (E. N.). Lagium Konow. Key to Species. 1. Head above lateral ocelli impunctate, strongly punctate below; median femoral pocket smooth, polished, impunc- tate; body black, with apices of front femora and their tibiae and tarsi beneath yellowish; second and third abdom- inal segments above rufous; wings strongly infuscated. Length 13 mm cinctulum Head above and below lateral ocelli strongly punctate; me- dian femoral pocket finely longitudinally rugose 2 2. Abdomen wholly black; body black, with apex of anterior femora, their tibiae and tarsi beneath, yellow; a spot on the posterior coxae white, sometimes wanting in males; wings strongly infuscated. Length 13 mm atroviolaceum Abdomen wholly rufous beyond the basal plates, except the saw-guides atroviolaceum var. tardum L. cinctulum (Norton). Tenthredo atroviolacea var. ciiictula Norton. New Haven, 13 July, 1904 (P. L. B.) ; Scotland, 25 July, 1904 (B. H. W.) ; Lyme, 5 August, 191 1 (A. B. C). L, atroviolaceum (Norton). Tenthredo atroviolacea Norton. Tenthredopsis atroviolacea Norton. Connecticut (E. N.). 82 CONNECTICUT GEOL. AND NAT. HIST. SURVEY.. [Bull. L. atroviolaceum var. tardum (Norton). Tenthredo atrovio- lacea var. tarda Norton. Connecticut (E. N.) ; Hartford (Nason). Tenthredopsis Costa. *T. semilutea (Norton). Tenthredo semilutea Norton. Female: body black, with the clypeus, labrum, mandibles, supraclypeal area, line on collar, tegulse, lateral margin of prono- tum, broad spot on mesopleurse, line on metapleurse, pectus for the most part, small spot of lateral lobes of mesonotum, scutellum, the coxse, and the trochanters, white ; abdomen beyond the basal plates, antennae either entirely beyond the second segment or beneath beyond the second segment, and the remainder of the legs except a black ring on the apex of posterior femora, rufous. Male dififers in having a line on the front and middle legs extending to the apex of femora and on the posterior legs extending to the apex of the tibiae, with the disk of the basal plates, the two basal abdominal segments, and a minute spot around the abdominal spiracles, black. Length 7-8 mm. Connecticut (E. N.). Neopus MacGilHvray. °N. 14-punctatus (Norton). Tenthredo 14-punctata Norton, Tenthredopsis 14-punctata Norton. Body greenish white, with a spot on the vertex, the disk of each lobe of the mesonotum, the disk of the pronotum, the sutures of the thorax, the legs more or less above, the tarsi dark- est, and the sutures of the abdomen, black ; sometimes the metathorax entirely, a line between the prothoracic pleurae and pectus, and a triangular spot on the disk of the abdominal seg- ments, black. Length 9 mm. Bivena MacGillivray. °B. delta (Provancher). Pachyprotasis delta Provancher. Tenthredopsis delta Provancher. Homcconcura delta Provancher. Female: body black, with the clypeus, labrum, mandibles, supraclypeal area, genae, inner orbits, collar narrowly, tegulae, spot on mesopleurae, scutellum, spot above posterior coxae, coxae for the most part, and trochanters, white ; antennae beneath, legs beyond trochanters, except the posterior femora and tibiae at No. 22.] HYMENOPTERA OF CONNECTICUT. 83 apex, and abdominal segments two to four, rufous. Male differs in having more black on the posterior legs. Length 6-8 mm. Leucopelmonus INIacGillivray. °L. annulatus MacGillivray. Female : body black, with the labrum, antennal segments five and six, the tegulae, the apices of the coxae, the trochanters, the middle and posterior tarsi, and the stigma at base, white ; antennae at base, the clypeus, mandibles, spot on supraclypeal area, pro- thorax, mesonotum except spots on lateral lobes, scutellum, post- scutellum, legs beyond the trochanters except parts named, raeso- pleurae and metapleurae in great part sometimes, and abdomen, rufous. Male differs in having the entire antennae and only abdominal segments one to five rufous, the posterior femora and tibiae black at apex. Length 7-10 mm. Rhogogastera Konow. °R. evansii (Harrington). Tenthredopsis evansii Harrington. Body greenish-yellow, with the antennas above, a spot on the vertex, the greater part of the mesonotum, the metanotum, the apex of the scutellum, a broad band along the middle of the ter- gum, the apices of the tibiae, and the apex of each tarsal segment, black; wings hyaline; the head smooth, impunctate. Length 12 mm. Tenthredo Linnaeus. Key to Species. 1. Antennae wholly or in part pale 2 Antennae wholly black 20 2. Antennas wholly pale 3 Antennas in part black 8 3. Abdomen wholly black beyond basal plates 4 Abdomen wholly or in part rufous 6 4. Femora rufous 48 Femora for the most part black 5 5. Head uniformly finely punctate ; body black, with clypeus, la- brum, mandibles at base, scutellum, legs beyond coxas except posterior femora, and basal plates in part, yellow; antennae, posterior orbits, tegulae, wings in great part, and anterior and middle femora, somewhat rufous. Length 11 mm femaldi Head impunctate, but finely, indefinitely "wrinkled; body black, with antennae, clypeus in part, front femora before, 84 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. front and middle tibiae and tarsi before, tarsal segments ringed with black at apex, yellowish fuscous; sides of basal plates yellow ; wings slightly inf uscated, the veins and stigma fuscous. Length 12 mm dubitata 6. Ocellar basin with a ridge at middle; abdomen wholly rufous; body rufous, with some small spots on head, antennae in part sometimes, prothorax in great part, side lobes of mesonotum in part, mesopleurae in part, pectus, and ab- dominal segments in part, black ; clypeus, labrum, man- dibles at base, a spot on supraclypeal area, inner orbits, beneath eyes, collar, tegulae, and a spot above the coxse and on the sides of the basal plates, yellow. Length 11 mm mellina Ocellar basin with a furrow at middle ; abdomen not wholly rufous 7 7. Abdomen black at base and rufous at apex; body rufous, with antennal area in part, prothorax in great part, lobes of mesonotum in part, pectus, and three basal segments of abdomen, black ; clypeus, labrum, mandibles, spot above posterior coxae, sides of basal plates, and tarsi and pos- terior tibiae in great part, yellow. Length 12 mm redimacula Abdomen black at base and apex, rufous at middle; body black, with clypeus, labrum, mandibles at base, spot on supraclypeal area, collar, scutellum, a spot above posterior coxae, sides of basal plates, and tarsi, yellow ; tegulae, front femora beneath, tibiae for the most part, and abdominal seg- ments two to four, rufous. Length 10 mm neoslossoni 8. Antennae pale at base or apex 9 Antennte pale beneath, black above 18 9. Antennae pale at apex 10 Antennae pale at base 14 10. Abdomen bej'ond the basal plates wholly black 11 Abdomen wholly or in part pale 13 11. Ocellar basin deeply hollowed out, scoop-shaped, and im- punctate; body black, with clypeus, labrum, mandibles at base, antennae at apex, a spot above posterior coxae, and sides of basal plates, yellow; front and middle femora in part, tibiae, and tarsi beneath, rufous; scutellum and meso- notum densely, finely punctate. Length 12 mm nigricoUis Ocellar basin hollowed out with a transverse ridge above the middle 12 12. Anterior femoral pocket yellow; body black, with clypeus, labrum, mandibles at base, antennae at apex, collar broadly, anterior femoral pocket, scutellum, spot above posterior coxse, *apex of basal plates, front legs beneath beyond the mid- dle of the femora, and middle legs beneath beyond the apex of the femora, yellow; wings infuscated at apex. Length 12-13 mm grandis No. 22.1 HYMENOPTERA OF CONNECTICUT. 85 Anterior femoral pocket black; body black, with clypeus, labrum, mandibles at base, antennas at apex, collar, scutellum, front legs beneath beyond the middle of the femora, middle tarsi, a spot on sides of basal plates, apex of basal plates, some- times broadly, rarely a spot above posterior coxae, white; wings infuscated at apex. Length 12 mm antennata 13. Abdomen black at base and apex, rufous in middle; body black, with apex of antennae, a white spot above posterior coxae, a spot on pleurae, sides of basal plates, anterior and middle coxae and trochanters in part, tegulae, base of costa, legs except the parts named and the bases of the coxae, a line on the femora above, a spot at apex of the tibiae above, pos- terior tarsi for the greater part, and abdominal segments three to six, rufous. Length 10 mm semicomis Abdomen yellow; body black, with clypeus, labrum, mandi- bles at base, cheeks, orbits, two spots on postocellar area, apex of antennae, collar and tegulae, scutellum, two spots on pleurae, and apices of coxae, a spot on side of posterior coxae, and trochanters, yellow; legs, except apex of pos- terior femora, rufous. Length 11 mm jocosa 14. Vertex impunctate, polished 15 Vertex finely, distinctly punctate 17 15. Head with orbits wholly black; body black, with clypeus, labrum, mandibles at base, cheeks broadly, collar, tegulae, oblique spot at middle and edge of posterior margin of mesopleurje, spot above posterior coxae, coxae except above, and margin and sides of basal plate, white; legs (except a line above on front and middle femora, hind coxae, apex of femora above, apex of tibiae and tarsi), and abdomen, rufous; in some specimens the antennas may be entirely black or rufous beneath at the apex, or the apex of the abdomen black, or the pleurae almost wholly black. Length 13 mm signata Head with orbits in great part yellow 16 16. Appendage of scutellum transversely striate, with numerous large punctures; body black, with clypeus, labrum, mandi- bles at base, cheeks, orbits, interrupted opposite base of antennae and at top of head, collar, tegulae, vittae on meso- notum, metanotum in part, spot above posterior coxae, and spot on side of basal plates, yellow ; legs beyond coxae, except basal half of middle and hind femora above, two basal segments of antennae, and abdomen beyond third segment, rufous. Length 13 mm bilineata Appendage of scutellum not striate, with few punctures or none ; body in female black, with clypeus, labrum, mandibles, supraclypeal area, orbits in great part, collar, tegulae, vittae on mesonotum, sometimes wanting, scutellum, postscutel- 86 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. lum, rarel}' with a small spot on mesopleurre, front legs, middle legs beyond coxie, posterior trochanters, basal half of femora, tibiae and tarsi, basal plates, venter of five basal abdominal segments, tergum of fourth and a band at middle and sides of first and third, sometimes narrowed to a line at middle, yellow; costa yellow, stigma pale at base; male differs in having pleurae, pectus, all the coxce, and abdomen beyond first segment, yellow or rufous; posterior and middle femora with a black line above, basal plates and first abdominal segment black; some specimens wholly yelloY' or rufous, except antennas beyond second segment, spot on vertex, three spots on mesonotum, and base of abdomen, w-hich are black. Length 11-13 mm. verticalis 17. Abdomen rufous beyond basal plates; body black, with two basal segments of antennas, posterior orbits, teguLx, scutel- lum, front and middle legs beyond coxae except the tarsi, the posterior femora at base and the tibiae, and the abdomen beyond the basal plates, rufous; clypeus, labrum, cheeks, collar, a spot above posterior coxas, and tarsi, white. Length 12 mm ruficolor Abdomen black at base and apex, rufous at middle;* body black, with clypeus, labrum, mandibles., cheeks, collar, tegul^e, spot above posterior coxse, legs except apical half of posterior femora and ring at apex of tibiae, and the basal plates, yellow; two basal segments of antennae and abdom- inal segment four and a part of three and five, yellowish rufous; wings hyaline. Length 12 nun bifasciata 18. Abdomen wholly or in part rufous (See sec. 15) signata Abdomen w^hoUj' black 19 19. Pectus black (See sec. 48) rufipes Pectus rufous... (See sec. 48) rufopecta 20. Head above antennae more or less yellow 21 Head above antennae wholly black 30 21. Abdomen wholly or in part pale 22 Abdomen wholly black 29 22. Scutellum wholly or in part 3-ellow 23 Scutellum wholly black 26 23. Pleurse and pectus black (See sec. 16) verticalis Pleurae and pectus pale 24 24. Abdomen wholly pale be3'ond the basal plates 25 Abdomen with first three abdominal segments black; bodj"- black, w'ith clypeus, labrum. mandibles, cheeks, face around and beneath antennae, inner orbits, a line near occi- put, tegulae, collar, spot on sides of scutellum, spot on pleurae, coxae, trochanters, front legs in great part, middle femora, basal third of posterior femora, venter of abdo- No. 22.] HYMENOPTERA OF CONNECTICUT. 8/ men, and edge of basal plates, white; middle tibiae and tarsi, posterior femora and tibiae in great part, and five apical ab- dominal segments, rufous. Length 13 mm formosa 25. Scutellum smooth, polished, impunctate; body rufous or yellow, with an irregular spot above ocelli, a spot on the center of each lobe of mesonotum, basal plates for the most part, a small spot on the posterior coxae, trochanters, and base of femora above, black. Length 13 mm rubripes Scutellum finely, densely punctate; body black, clypeus, la- brum, mandibles, cheeks, orbits, posterior margin of post- ocellar area, supraclypeal area, collar broadly, tegulae, V-spot, scutellum, postscutellum, pleurae except sutural lines, pectus, legs except a black line above on femora, and abdomen except basal plates, yellow. Length 12 mm. causata 26. Posterior coxae black at base; body black, with clypeus, la- brum, mandibles, cheeks, orbits except at top of eyes, V-spot, spot on side of pronotum, collar, tegulae, an angu- lar mark on pleurae, pectus in part, spot above posterior coxae, sides of basal plates, apical portion of coxae, tro- chanters, femora except above, front and middle tibiae and tarsi except above, and basal half of abdomen beneath, white; abdomen rufous beyond second segment. Length 10 mm angulata Posterior coxae wholly pale 27 27. Posterior orbits black; body black, with clypeus, labrum, mandibles, face above and beneath antennae, inner orbits, tegulae, collar, angular spot on pleurae and the basal half of venter, white ; legs whitish except a black line at apex of ante- rior femora and base of tibiae above, middle femora and tibiae above, posterior femora and tibiae for the most part ; five apical segments of abdomen rufous. Length 13 mm eximia Posterior orbits wholly pale 28 28. Abdomen with four basal segments black; body black, with clypeus, labrum, mandibles, face above and below anten- nae, anterior and posterior orbits, collar, tegulae, spot on pronotum, pleurae for the most part, pectus and sides of basal plates, white; legs yellowish rufous, except apex of front femora above, basal half of front and middle tibiae above, middle and posterior femora above, and basal third of poste- rior tibiae, which are black. Length 13 mm simulata Abdomen with three basal segments black; body black, with clypeus, labrum, mandibles, face above and below anten- nae, anterior and posterior orbits, collar, tegulae, pro- notum at sides, pleurae for the most part, and pectus, yellow; legs yellow, except line on front femora at apex above, front tibiae above, middle femora and tibiae above, and hind 88 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. femora and greater part of tibiae, which are black; abdomen rufous, except basal plates and three tergal segments. Length 12 mm secunda 29. Pleurae black; body black, with clypeus, labruni, mandibles, orbits entirely except above, face about and beneath anten- nae, collar, tegulae, margin of pronotum, V-spot, vittae on mesonotum, metanotum at sides, spot above posterior coxas, front legs except line above, middle legs beyond coxae except greater part of femora and tibiae above, hind legs beyond coxae except femora and tibiae above at apex, ■ pale yellow. Length 14 mm lobata Pleurae with a large angular white spot; body black, with clypeus, labrum, mandibles, orbits except above, broadly behind, face above and below antennae, collar, tegulae, lat- eral margin of pronotum, V-spot above posterior coxae, large angulate spot on pleurae, pectus in great part, front legs except point above at apex, middle legs except apical half of femora and tibiae above, hind legs except apical half of femora and tip of tibiae, and abdomen beneath, white. Length 14 mm angulifera 30. Abdomen in part pale 31 Abdomen, including venter, black 45 31. Tergum in part pale z^ Tergum wholly black 44 32. Mesopleurae wholly or in part pale 33 Mesopleurae wholly black 42 2,^. Pectus pale 34 Pectus black 41 34. Posterior femora wholly or in part pale above 35 Posterior femora wholly black above 39 35. Posterior femora wholly pale 36 Posterior femora in part black 38 36. Abdomen wholly or in part black 37 Abdomen wholly rufous; body black, with clypeus, labrum, mandibles, cheeks, collar, tegulae, sides of pronotum, lower half of mesopleurae, pectus, spot above posterior coxae, sides of basal plates, coxae, trochanters, remainder of front legs except a line above on femora, white; remainder of legs except a line above on middle femora, and abdomen be- yond basal plates, rufous. Length 11 mm frigida 2,7. Abdomen wholly black above; body black, with clypeus, la- brum, mandibles, cheeks, collar, tegulas, narrow line on pleurae, spot above posterior coxae, sides of basal plates, and a narrow band along the side of the abdomen, white ; legs rufous with tip of middle femora, apex of posterior femora, and apical half of posterior tibiae black; pectus more or less rufous. Length 11 mm lineata No. 22.] HYMENOPTERA OF CONNECTICUT. 89* Abdomen black, with at least the second and third tergal seg- ments rufous; body black, with clypeus, labrum, mandibles, cheeks, dot at base of antennae, collar, tegulae, side of pronotum, angulate spot on pleurae, pectus, spot above pos- terior coxae, and four anterior coxae, yellow; legs except a spot on tip of anterior femora and apical half of posterior tibiae and tarsi, and the second, third, and part of the fifth abdominal tergite, and all the sternites except the two apical, rufous. Length 12 mm rufopediba 38. Front and middle legs with a black line above. (See sec. 15) signata Front and middle legs wholly pale; body black, with clypeus, labrum, mandibles, cheeks, inner orbits narrowly, collar, tegulae, line on mesopleurae, pectus in part, spot above pos- terior coxae, coxae, and trochanters, yellow; legs except the parts named and apices of posterior femora and tibiae and their tarsi, and abdomen beyond basal plates, rufous. Length 12 mm pallicola 39. Posterior tibiae black at apex 40 Posterior tibiae wholly pale; body black, with clypeus, la- brum, mandibles, cheeks, collar, tegulae, spot on lower edge of pronotum, spot on pleurae, pectus, spot above posterior coxae, sides and posterior margin of basal plates, coxae and trochanters except a black line above, front femora except a black line above, yellow; remainder of legs ex- cept a black line above on femora and the posterior tarsi entirely, and abdomen beyond basal plates, rufous. Length 12 mm hyzilina 40. Abdomen black at base only ( See sec. 15) signata Abdomen black at base and apex; body black, with clypeus, labrum, cheeks, collar, tegulae, spot on mesopleurae, spot above posterior coxae, legs (except a black line above as far as apex of femora, apical three-fourths of posterior tibiae, and their tarsi) yellow, shading to rufous on the pos- j terior legs; abdomen with segments two to five rufous. Length 13 mm slossoni 41. AbdoYnen rufous beyond first segment; body black, with clypeus, labrum, mandibles, cheeks, collar, tegulae, spot on mesopleurae, lower margin of pronotum, caudal margin of mesopleurae, spot above posterior coxae, sides of basal plates, front and middle legs except a black line above to the apex of tibiae, posterior coxae above and beneath, and a line beneath on the posterior femora and tibiae, yellow. Length 13 mm junghannsii Abdomen rufous beyond third segment; body black, with clypeus, labrum, mandibles, cheeks, collar and tegulae narrowly, a spot on mesopleurae, a spot above posterior 90 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. coxae, front and middle legs except a black line to the base of tibije, the apical half of the posterior coxae, the poste- rior trochanters, the basal third of the posterior femora, and venter of three basal abdominal segments, yellowish white. Length 12 mm nova 42. Pectus black 43 Pectus pale; body black, with clypeus, labrum, mandibles, cheeks, collar, tegulae, spot above posterior coxae, pectus, anterior coxae, and trochanters, white; legs except apical half of posterior tibiae and their tarsi, and second to fourth segments of abdomen, rufous. Length 12 mm varians 43. Posterior tibiae wholly black; body black, with clypeus, la- brum, mandibles, cheeks, spot above posterior coxae, front and middle legs except a black line above beyond coxae, yellow; posterior femora and abdomen beyond second segment rufous. Length 12 mm mutans Posterior tibiae wholly pale; body black, with clypeus, la- brum, mandibles except at apex, cheeks, collar, a spot above posterior coxk, and sides of basal plates, white; tegulas, legs except anterior coxae above and femora in great part, and abdomen beyond fourth segment, rufous. Length 12 mm montana 44. Pectus rufous (See sec. 48) rufopecta Pectus black (See sec. 48) rufipes 45. Legs black, varied with white or yellow 46 Legs rufous, varied more or less with black or yellow 48 46. Posterior tibiae in part pale 47 Posterior tibiae wholly black; body black, with clypeus, la- brum, mandibles, cheeks, collar, tegulae, spot above pos- terior coxae, sides of basal plates, anterior pair of legs for the most part, middle tibiae at tip, and tarsi at apex, white ; wings clouded toward apex. Length 12 mm flavomarginis 47. Scutellum and mesopleurae black; body black, with clypeus, labrum, mandibles, collar, spot above posterior coxa;, sides of basal plates, front femora beneath, front tibiae except at apex above, middle tibiae beneath, posterior tibias except apical third, and tarsi, white. Length 13 mm. cinctitibiis Scutellum and mesopleurae in part pale; body black, with clypeus, transverse line on vertex, labrum, collar, tegulas, a spot on mesopleurae, scutellum, two spots on basal plates, and a spot on posterior coxae, white ; legs black, with spot on front and hind coxae, trochanters, front tibiae before, band on middle and hind tibia;, and bases of all the tarsal segments, white. Length 12 mm decorata 48. Pectus rufous; body black, with clypeus, labrum, mandibles, line on collar, tegulae, spot above posterior coxae, and some- No. 22.] HYMENOPTERA OF CONNECTICUT. 9I times narrow apical margin of abdominal terga, white; pleurae, pectus, and legs (except tips of the posterior femora, apical half of the tibiae, and their tarsi) rufous. Length 13 mm rufopecta Pectus black; body black, with clypeus, labrum, nnandibles, and a spot above posterior cox?e, yellow ; legs, except apical half of posterior tibiae and their tarsi, rufous. Length 13 mm rufipes T. rufopecta (Norton). Howard, Insect Book, PI. xiii, Fig. 16. Connecticut (E. N.) ; New Haven, i June, 191 1 (A. B. C). °T. fernaldi MacGillivray. °T. dubitata MacGillivray. °T. mellina (Norton). °T. redimacula MacGillivray. °T. neoslossoni MacGillivray. °T. nigricollis Kirby *T. grandis (Norton). Howard, Insect Book, PI, xiii, Fig. 30. Farmington (E. N.). °T. antennata Kirby. °T. semicornis Harrington. °T. jocosa Provancher. °T. signata (Norton). °T. bilineata MacGillivray. T. verticalis Say. Howard, Insect Book, PI. xiii, Fig. 32. Connecticut (E. N.) ; West Haven, 27 June, 1905 (H. L. V.) ; New Haven, 14 July, 1908 (B. H. W.), 30 May, 191 1 (A. B. C). °T. ruficolor Norton. °T. bifasciata (Say). Allantus bifasciatus Say. Macrophya bifasciafa Say. T. rufipes Say. Howard, Insect Book, PI. xiii. Fig. 23. New Haven, 9 June, 191 1 (A. B. C). °T. formosa Norton. Howard, Insect Book, PI. xiv, Fig. 18. °T. rubripes MacGillivray. °T. causata MacGillivray. °T. angulata Norton. °T. eximia Norton. 92 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [BulL °T. Simula ta MacGillivray. °T. secunda MacGillivray. *T. lobata (Norton). Howard, Insect Book, PI. xiii. Fig. 4.. Farmington (E. N.) ; Westville, 11 June, 1905 (W. E. B.). T. angulifera (Norton). Connecticut (E. N.). °T. frigida MacGillivray. °T. lineata Provancher. °T. rufopediba Norton. °T. pallicola MacGillivray. °T. hyalina MacGillivray. °T. slossoni MacGillivray. °T. junghannsii MacGallivray. °T. nova MacGillivray. °T. varians Norton. °T. mutans Norton. °T. montana Provancher. *T. flavomarginis (Norton). Farmington (E. N.). °T. cinctitibiis Norton. Howard, Insect Book, PI. xiii, Fig. 25. °T. decorata Provancher. Labidia Provancher. °L. originalis (Norton). Allantus originalis Norton. Body black, with the clypeus, labrum, mandibles at base, col- lar broadly, scutelhim, postscutellum, a spot on the outer side of posterior coxae, anterior and middle femora beneath, tibiae except a ring on the apex of the posterior pair, tarsi, basal plates, apical half of each abdominal segment, interrupted at middle on the first and second segments, yellow ; body finely, densely punctate ; veins and stigma rufous. Length 10 mm. Macrophya Dahlbom. Key to Species. I. Antennae wholly black 2 Antennae not wholly black 27 No. 22.] HYMENOPTERA OF CONNECTICUT. 93 2. Scutellum white or yellow 3 Scutellum wholly black lo 3. Mesopleurae wholly black 4 Mesopleurae with a white or yellow spot 7 4. Abdomen in part rufous or brownish 5 Abdomen wholly black 6 _S. Abdomen dorsally and ventrally with segments two, three, and four brownish; body black, with front and middle legs, tegulae, and base of wings, brownish ; collar, scutellum, a large spot on side of posterior coxae, their apices, basal third of posterior femora, and tarsi beyond basal three-fourths of first segment, white; wings hyaline. Length 8 mm nidonea Abdomen rufous beyond basal plates; body black, with clypeus, labrum, mandibles at base, collar, tegulas, scutel- lum, front legs except coxae in part above and tibiae at apex beneath, middle legs except a ring on apex of tibiae, poste- rior legs (except basal half of coxae, apical two-thirds of femora and a ring at their base, apical third of tibiae, and basal half of metatarsus), white; mesopleurae uniformly densely punctate. Length 8 mm omata '6. IMiddle legs beyond coxae in part black; body black, with clypeus, labrum, collar, two spots on postocellar area, teg- ulae, scutellum, front coxae at apex, front femora and tibiae beneath, front tarsal segments at base, middle coxae at apex, middle trochanters, middle femora at extreme base and apex, middle tibiae except at apex, middle tarsi except at apex, a spot on side and apex of hind coxae, hind trochan- ters, middle of hind tibiae, hind metatarsi except extreme base and apex, hind tarsi at apex, and basal plates at mid- dle, white; veins black; wings smoky; head closely punc- tate, with an impunctate area on each upper orbit. Length 9-10 mm epinota Middle legs beyond apices of coxae wholly yellow; body black, with clypeus, labrum, collar, tegulae, scutellum, front and middle legs beyond apices of coxae, apices of hind coxae, hind trochanters, basal half of hind femora, hind tibiae except apical third, hind tarsi, and basal plates, yel- low; stigma and veins brownish; head densely, finely punctate, with minute impunctate areas on the upper orbits. Length 8 mm texana 7. Abdomen rufous beyond first segment; body black, with clypeus, labrum, collar, tegulae, scutellum, oblique spot on pleurae, front and middle legs, hind coxas and hind trochan- ters, basal half of hind femora, band on middle of hind tibiae, and hind tarsi except apex of apical segment, yellow or white. Length 8-9 mm trosula Abdomen wholly black 8 94 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 8. Antennal area without an inipunctate area; body black, with clypeus, labrum, collar broadly, tegulae, scutellum,^ post- scutellum, round spot on mesopleurse, front and middle legs except apical third of femora and extreme base and apex of tibise, basal plates, and last abdominal segment, yellow; stigma and veins brownish; niesopleurse above the yellow spot much more densely punctate than below. Length lo mm alba Antennal area with a small impunctate area 9 9. Mesopleurae with upper half more coarsely and densely punc- tate than lower half; basal plates yellow; body black, with clypeus, labrum, collar, tegulas, scutellum, an oblique band on pleurae frequently interrupted, apices of front coxae, front femora beneath, front tibiae beneath and at base, front tarsal segments except at apex, middle coxae in great part, middle trochanters, middle femora on basal half, middle tibije and tarsi except a ring at apex, hind coxae and hind trochanters, basal third of hind femora, hind tibiae except a ring at base and the apical fourth, a ring on mid- dle of hind metatarsi, basal plates, and last abdominal seg- ment, yellowish; wings smoky, veins and stigma brownish. Length 10 mm pulchella Mesopleurae with upper half slightly more coarsely but no more densely punctate than lower half; basal plates wholly black; body black, with clypeus, labrum, mandibles at base, collar, tegulae, scutellum, an oblique band on the mesopleurae frequently interrupted, front and middle legs except tips of femora and tibiae above and apices of tarsal segments, hind legs (except apical half of femora, a ring at base of tibiae, apical fifth of tibis, and apices of tarsal segments), and an . oblique band on apex of metapleurae, yellow or white; wings hyaline. Length 8-9 mm confusa 10. Abdomen wholly black 11 Abdomen more or less pale; body black, with front and mid- dle tibiae beneath and three basal segments of abdomen, piceous; wings infuscated, veins black, stigma piceous. Length 12 mm dejecta 11. Posterior tibiae in part pale 12 Posterior tibiae wholly black 21 12. Posterior tibiae banded with pale at middle 13 Posterior tibiae with an outer pale line or spot, sometimes in- distinct 19 13. Mesopleurae with a white or yellow spot 14 Mesopleurae wholly black iS 14. Mesopleurae more densely punctate on upper half than on lower half; body black, with clypeus, labrum, mandibles No. 22.] HYMENOPTERA OF CONNECTICUT. 95 at base, collar, tegulse, line on pleurae, front legs beneath and base of femora and tibiae above, middle legs except at apex of femora above and a ring on apices of tibiae and apices of tarsal segments, hind legs (except base of coxae, apical two-thirds of femora, ring at base and apical fourth of tibiae, and ring on apices of tarsi) white. Length 9 mm lineata Mesopleurae uniformly densely punctate; body black, with clypeus, labrum, collar, tegulae, round spot on pleurae, front and middle femora, hind legs with apices and spot on side of coxae, trochanters, ring on base and apex of femora, middle of tibis, tarsi with ring at apex of each segment and base of metatarsus, white. Length g mm. punctata 15. Antennal area no more densely punctate than postocellar area 16 Antennal area distinctly more densely punctate than post- ocellar area 17 16. Antennal area with a distinctly rounded, pit-like median fovea; body black, with apex of labrum, collar and tegulae narrowly, front legs beyond coxae and beneath except basal third of femora, middle legs beyond coxae (except femora, ring at apex of tibiae, and apices of tarsi), an elongate spot on hind coxae, their apices, hind tarsi except at apices of segments, basal half of hind metatarsi, and hind margin of basal plates, white. Length 9 mm mixta Antennal area without any indication of a median fovea ; body black, with clypeus, labrum, mandibles at base, line on collar and tegulae, front and middle legs beneath ex- cept middle femora, an elongate spot on hind coxa?, hind trochanters, ring at base of hind femora, ring at middle of hind tibiae, hind tarsal segments except ring at apex, and hind margin of basal plates, white. Length lo-ii mm. pannosa 17. Posterior coxae black, with a large outer white or yellow spot 18 Posterior coxae, except at tip, wholly black; body black, with clypeus, labrum, collar tegulae, legs (except base of coxae, apex of front femora and tibiae above, apex of middle femora and tibiae, apex of hind femora, base and apex of hind tibiae and hind tarsi), and basal plates, yellow. Length 10 mm proximata 18. Front and middle femora black on basal half; body black, with clypeus, labrum, collar, tegulae, apical half to two- thirds of coxae, trochanters, apical fifth of front and middle femora, front and middle tibiae except a line above and a ring at apex, front and middle tarsi except at apex, basal fourth of posterior femora, a ring on middle of posterior tibiae, and tarsi except at apex, yellow. Length 10 mm. .flavicoxa ■96 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. Front and middle femora wholly yellow; body black, with clypeus, labrum, collar, tegulae, front and middle legs except a ring at apex of tibiae and apex of tarsi, posterior coxae, trochanters, basal half of femora, median half of tibiae, and tarsi except at apex, yellow. Length 10 mm. incerta 19. Posterior coxae wholly black; body black, with clypeus, la- brum, line on collar, tegulae, trochanters, a ring on base and apex of femora, front and middle tibiae and tarsi be- neath, and a line on hind tibiae, white; scutellum densely punctate. Length lo-ii mm externa Posterior coxae black, with a white spot on the side 20 J80. Posterior orbits as densely punctate as the antennal area; body black, with clypeus, labrum, two spots on occiput, very narrow line on collar and tegulae, a spot on the outer side of coxae, trochanters, apical half of front and mid- dle femora beneath, front and middle tibiae beneath, front and middle tarsi except a ring at apices of segments, posterior tibiae on upper median half, and hind margin of the basal plates, white. Length 10 mm tibiatcr Posterior orbits not as densely punctate as the antennal area; body black, with clypeus, labrum, narrow line on col- lar, tegulae, front coxae beneath, a spot on side of middle and hind coxae, trochanters, front femora at apex be- neath, front and middle tibiae beneath, front and middle tarsi beneath, posterior tibiae at middle above, and pos- terior tarsi beyond the apex of the metatarsi except a ring at apex of each segment, white. Length 9 mm bilineata 21. Posterior legs wholly black; body black, with base of mandi- bles, apical half of front femora, and tibiae beneath, white; body strongly punctate throughout; wings fuliginous. Length 12 mm fuliginea Posterior legs in part white or yellow 22 22. Posterior coxae wholly or in great part pale 23 Posterior coxae black, with an outer pale mark 24 23. Anterior tibiae wholly yellow (male) flavicoxa Anterior tibiae with a black line above (male) incerta 24. Head with an impunctate area below median ocellus; body black, with clypeus, labrum, mandibles at base, line on collar, tegulas, coxae at apex and a spot on outer margin, trochanters, apical half of anterior femora beneath, an- terior tibiae beneath, apical half of middle tibiae beneath, tarsi except a ring at apices of segments, and posterior meta- tarsi, white ; postocellar area distinctly separated from upper orbits. Length 11-12 mm propinqua Head without an impunctate area below median ocellus 25 No. 22.] HYMENOPTERA OF CONNECTICUT. 9/ 25. Postocellar area densely punctate throughout 26 Postocellar area sparsely punctate, except on its occipital margin; body black, with clypeus, labrum, mandibles at base, front coxse in great part beneath, middle coxae at apex, hind coxa at apex, and a large spot on outer side, trochanters, front femora at apex beneath, front and mid- dle tibiae beneath, and tarsi except apices of segments and posterior metatarsi, white; upper orbits with a large im- punctate area. Length 8 mm contaminata 26. Mesopleurae more densely punctate on upper portion than lower; body black, with clypeus, labrum, mandibles at base, narrow line on collar and tegulse, front and middle legs beneath except base of coxas, a large spot on side of hind coxae, hind trochanters, and hind tarsi beyond the meta- tarsi, white; upper orbits with a large impunctate area. Length 8 mm albomaculata Mesopleurae uniformly densely punctate throughout; body black, with tip of labrum, front and middle legs beneath beyond middle of coxae, apices and a large spot on outer side of hind coxae, and hind trochanters, white ; front, post- ocellar area, and upper orbits almost uniformly finely punctate minuta 27. Antennas pale at base or apex 28 Antennae pale at base and apex Z7 28. Antennae pale at apex 29 Antennae pale at base 31 29. Collar black; body black, with antennae at apex, labrum in part, trochanters, front legs beyond middle of femora be- neath, middle legs beyond basal two-thirds beneath, and a large spot on the side of the posterior coxae, white; head uni- formly densely punctate. Length 10 mm nigra Collar broadly white 30 30. Middle of head between antennal furrows distinctly elevated; posterior orbits polished and obsoletely punctate ; body black, with apex of antennae, clypeus, labrum, base of mandibles, collar broadly, V-spot, a triangular spot on pleurae, sometimes a mere dot, or wanting, an elongate dot at base of each wing, sometimes wanting, scutellum, front and middle legs (ex- cept femora and tibiae above, a ring at apex of tibiae, and rings at apices of tarsal segments), a spot on side of hind coxae, hind trochanters, hind femora beneath, venter of ab- domen, and dorsal apical margin of segments, enlarged at sides (apical margin sometimes wanting), white. Length 1 1 mm zonalis Middle of head between antennal furrows not decidedly ele- vated; posterior orbits distinctly punctate; body black, 7 98 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. with antennae at apex, clypeus, labrum, mandibles at base, collar, V-spot, sometimes wanting, scutellum, front legs beyond basal third of femora beneath, tarsal segments at base, middle femora at apex beneath, middle tibi?e in part be- neath, middle tarsal segments at base, a spot on hind coxae, hind trochanters, hind femora beneath, and apical margins of abdominal segments, white. Length lo-ii mm. trisyllaba 31. Abdomen wholly or in part rufous 32 Abdomen wholly black, or black marked with white 34 32. Abdomen wholly rufous; body black, with clypeus, labrum, mandibles at base, collar, tegulse, V-spot, scutellum, post- scutellum, angular spot on pleurae, front legs entirely, mid- dle legs except a black line on femora, posterior coxae except a black line, trochanters, basal third of femora, a stripe at middle above on posterior tibiae, and posterior tarsi beyond middle of metatarsi, white; two basal seg- ments of antennae, abdomen including basal plates except saw-guides, posterior two-thirds of femora, posterior tibiae at base and apex, and basal half of posterior meta- tarsi, rufous. Length 8 mm goniphora Abdomen wholly or in part rufous beyond second segment.. 33. 23. Vertical furrows not distinct and line-like; body black, with two basal segments of antennae, clypeus, labrum, mandibles, collar broadly, tegulae, V-spot, scutellum, postscutellum, round spot on pleurae, posterior margin of mesopleurae, legs except apex of posterior femora and tibiae, and basal plates, yellow; abdomen usually with the third, fourth, and fifth dorsal segments, rufous. Length 9-10 mm intermedia. Vertical furrows distinct, line-like; body black, with two basal segments of antennae, clypeus, labrum, mandibles at base, spot on supraclypeal area, collar broadly, tegulae, scutellum, postscutellum, rounded spot on pleurae, spot at base of hind wings, legs (except basal half of hind coxae, apical half of hind femora, and ring at apex of hind tibiae), yellow; fourth and fifth segments of tergum rufous. Length 12 mm formosa 34. Head uniformly densely punctate 35 Head with upper orbits not as densely punctate as antennal area 36 35. Abdomen whollj- black; body black, with two basal antennal segments, collar, a spot below collar on pleurae, front and middle legs bej'ond coxae except a band at middle of femora, apices of posterior coxae, their trochanters, a ring on base of femora, tibiae except a ring at apex, tarsi in part, and basal plates, white; body coarsely punctate. Length 8 mm cesta No. 22.] HYMENOPTERA OF CONNECTICUT. 99 Abdomen black, apical margin of segments margined with yellow; body black, with two basal segments of antennae, clypeus, labrum, mandibles at base, collar broadly, tegulae, rounded spot on mesopleurse, legs beyond apices of coxae except apex of posterior femora and tibiae, basal plates, and dorsal apical margin of abdominal segments, broader be- hind, white or yellow. Length 9 mm succincta 36. Postocellar area separated from posterior orbits by deep, well-marked vertical furrows; body black, with two basal segments of antennte, clypeus, labrum, V-shaped spot on collar, tegulse, scutellum, legs beyond apices of coxae ex- cept apices of posterior femora and tibiae, an elongate spot on outer upper side of posterior coxae, and basal plates, yellow; upper orbits polished, almost entirely without punctures. Length 11 mm melanopleura Postocellar area not distinctly separated from upper orbits, vertical furrows feeble (See sec. S3) intermedia 37. Pleurae with a large oblique white mark; body black, with apex of antennae, supraclypeal area, clypeus, labrum, man- dibles at base, pronotum in great part, V-spot, scutellum, postscutellum, large mark on pleurae, spot at base of hind wings, front and middle coxae, trochanters, and basal half of femora, a spot on hind coxae, their apices, trochanters and basal half of femora, and basal plates in part, white; two basal segments of antennae, tegulae, remainder of legs except apical half of femora, and abdomen except basal plates in part and tergum of first segment, rufous. Length 10 mm fascialis Pleurae wholly black; body black, with apex of antennae, clypeus, labrum, mandibles at base, collar, V-spot, scutel- lum, postscutellum, apical half of front and middle coxae, front and middle trochanters, basal half of front and mid- dle femora, hind cox^e beneath and a large spot on the outer side, hind trochanters, basal half of hind femora, and hind tarsi, white; basal segment of antennae, tegulae, remainder of legs except apices of tibiae, and abdominal segments two to five, rufous. Length 10 mm varia °M. nidonea MacGillivray. °M. ornata MacGillivra^^ M. epinota (Say). Connecticut (E. N.) ; Hartford (Nason). °M. texana Cresson. M. trosula (Say). Connecticut (E, N.) ; New Haven, 30 May, 1910 (W. E. B.). lOO CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. M. alba MacGillivray. Macrophya pulchella var. alba Mac- Gillivray. Macrophya sonata Konow. New Haven, 21 May, 1910 (A. B. C). M. pulchella (Klug). Connecticut (E. N.). °M. confusa MacGillivray. °M. dejecta (Norton). *M. lineata Norton. Connecticut (E. N.) ; Farmington; New Haven, i June, 1908, Westville, 2 June, 1908 (B. H. W.) ; Hamden, 25 May, 1911 (A. B. C). °M. punctata MacGillivray. °M. mixta MacGillivray. M. pannosa (Say). Yalesville, 26 May, 1908, 17 June, 1907 (B. H. W.). *M. proximata Norton. Connecticut (E. N.)- *M. Havicoxa (Norton). Larva feeds on elder. Connecticut (E. N.) ; Waterbury, 9 June, 1905 (W. E. B.) ; Newr Haven, 21 May, 1910 (A. B. C). *M. incerta (Norton). Hovv^ard, Insect Book, PL xiv. Fig. 20, Connecticut (E. N,). M. externa (Say). Larva feeds on hickory. Connecticut, (E. N.) ; Poquonock, 27 June, 1905 (B, H. W.) ; New Haven, 14 June, 1910 (A. B. C), 26, 30 May, 1911 (A. B. C. and B. H. W.) ; Hamden, 25 May, 191 1 (B. H. W.). M. tibiator Norton. Larva feeds on elder. Connecticut (E. N.) ; Westville, 2 June, 1908 (B. H. W.). M. bilineata MacGillivray. Larva feeds on Viburnum. Milldale, 21 May, 1906 (B. H. W.). M. fuliginea Norton. New Haven, 17 June, 1905 (H. L. V.). °M. propinqua Harrington. °M. contaminata Provancher. *M. albomaculata (Norton). Connecticut (E. N.). M. minuta MacGillivray. Orange, 4 July, 1910 (B. H. W.). *M. nigra (Norton). Farmington (E. N.) ; Hamden, i June, 1911, New Haven, 28 June, 1911 (A. B. C). °M. zonalis Norton. No. 22.] HYMENOPTERA OF CONNECTICUT. lOI *M. trisyllaba (Norton), Howard, Insect Book, PI. xiii, Fig. 8. Larva feeds on elder. Connecticut (E. N.) ; New Haven, 27 June, 1902 (E. J. S. M.). M. goniphora (Say). Connecticut (E. N.) ; Hamden, i June, 191 1 (A. B. C). *M. intermedia (Norton). Connecticut (E. N.). M. formosa (Klug). Howard, Insect Book, PI. xiv. Fig. 25. Connecticut (E. N.) ; New Haven, 8 June, 1904 (W. E. B.), 4 July, 1905 (H. L. v.), 20 July, 1904 (B. H. W.), 24 June, 1902 (E. J. S. M.). °M. casta (Say). M. succincta Cresson. Stonington, 8, 14, June, 1906 (W. E. B.) ; New Haven, 25 June, 1907 (B. H. W.), 6 June, 1908 (W. E. B.), 26 May, 191 1 (A. B. C). °M. melanopleura MacGillivray. *M. fascialis Norton. Farrnington (E. N.) ; New Haven, 4 July, 1905 (H. L. v.). *M. varia (Norton). Farrnington (E. N.). AUantus Jurine. Key to Species. I. Female : posterior femora pale at base and black at apex, or black above and pale below; body black, with clypeus, labrum, mandibles, line on lower half of postgenae adjacent to eyes, two basal segments of antennae, collar, tegulas, meso- pleurae broadly, scutellum, a spot above posterior coxae, legs beyond cox« (except middle femora at apex above, apical half of posterior femora, and a ring on apex of posterior tibiae), basal plates, abdominal segments four, seven, and eight, and a spot on each side of fifth and sixth, yellow. Male differs in having only basal segment of antennae, genae, lower half of postgenae, mesopleurse entirely, sides of prono- tum, metapleurae, legs entirely except a black line above on middle and hind legs and hind tarsi, and abdomen beyond basal plates, white or yellow. Length 12 mm; basilaris Female: posterior femora wholly black or rufous; body black, with clypeus, labrum, mandibles, genae, lower half of postgenae, spot on mesopleurae, sometimes wanting, scutellum, tro- chanters, tibiae, becoming rufous at apex, tarsi, basal plates, and abdominal segments five to seven with a short band 102 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. interrupted at middle, yellow; antennae, tegulse, upper orbits at times, front femora, wings, veins, and stigma, rufous. Male differs in having antennae black, front femora entirely and middle femora beneath pale, and abdominal segments two to four entirely yellow. Length 12 mm. dubius A. basilaris (Say), Howard, Insect Book, PI. xiii, Fig. 15. Connecticut (E. N.) ; New Haven (H. L. V.) ; Canaan (A. P. Morse) ; Prospect, 15 August, 1906, Hamden, 23 August, 1910 (W. E. B.). A. dubius Norton. A. robustus Provancher. Scotland (B. H. W.) ; Colebrook, 20 July, 1905 (W. E. B.) ; Lyme, 31 July, 1910 (A. B. C). CiMBICIN.E. Key to Genera. 1. Free part of 2d A present 2 Free part of 2d A wanting, due to anastomosing of anal veins at middle Abia p. 102 2. Basal plates deeply emarginate at apex and filled with a chitinous membrane; hind femora not toothed. .Cimbex p. 103 Basal plates not or scarcely emarginate at apex and never with a chitinous membrane; hind femora more or less distinctly toothed beneath Trichiosoma p. 103 Abia Leach. *A. inflata (Norton). Z area in flata 'Norton. Howard, Insect Book, PI. xii, Fig. 8; PI. xiii, Fig. 28. Basal plates white; body bluish black, with the legs beyond the coxae except the basal two-thirds of the front and middle fe- mora, and the basal plates, white; the posterior femora some- times infuscated above ; third and following abdominal seg- ments with a band of sericeous pile, in no case covering the entire segment. Length 11 mm. Larva feeds on honeysuckle. Farmington (E. N.). °A. americana (Cresson). Zarea americana Cresson. How- ard, Insect Book, PI. xiv, Fig. 21, Basal plates not white ; body greenish black, with the tro- chanters, apices of the femora, the tibiae, and the tarsi, white; third and following abdominal segments with a band of sericeous pile covering practically the entire segment. Length 8-12 mm. No. 22.] HYMENOPTERA OF CONNECTICUT. IO3 Trichiosoma Leach. Key to Species. 1. Abdomen black, or at most with only the apex and lateral margins more or less rufous 2 Abdomen entirely rufous, or at most with only first and second segments with bars of black; tibiae and tarsi yel- lowish white; remainder of body black; pubescence of ver- tex black, of front, thorax, and base of abdomen, yellow; abdomen in great part bare, sides of segments with a short yellow pile with scattered longer hairs. Length 15-20 mm confusum 2. Abdomen wholly black or at least the last segment in most part black 3 Abdomen black with apex and lateral margin rufous, at least the apical segment always rufous; tibiae and tarsi yellow; remainder of body black; pubescence of vertex and front woolly, black, mixed with a few yellow hairs; pubescence of thorax and abdomen long, yellow, woolly and matted. Length 20-25 mm triangulum J. Abdomen densely covered with short black pile; tibiae and tarsi yellow; remainder of body black; pubescence of head and abdomen black; pubescence of thorax yellow, except a transverse band across the middle, which is black; abdomen short and broad, broadest at middle. Length 15 mm crassum Abdomen covered with long, woolly, gray hair; tibiae and tarsi yellow; tibias sometimes infuscated at base; remainder of body black; pubescence of entire body consisting of woolly gray hairs, more abundant on head and thorax; abdomen long and slender, sides parallel. Length 15-18 mm spicatum °T. confusum MacGillivray. T. triangulum Kirby. Howard, Insect Book, PI. xii, Fig. 5. Larva feeds on willow, wild cherry, poplar, alder. New Haven (F. E. Willits) ; Oxford, 21 May, 1904 (W. E. B.). T. crassum W. F. Kirby. Lyme, i May, 1910 (A. B. C). °T. spicatum MacGillivray. Cimbex Olivier. Key to Species. I. Tibiae pale yellow; body black, with antennae, tibiae and tarsi yellow; prothorax, middle of abdominal segments two to five and part of following segments yellowish ferruginous; I04 CONNECTICUT GEOL. AND NAT, HIST. SURVEY. [Bull. broad band at sides of abdominal segments two to four and spot at sides of segment five, white. Length i6 mm. semidea Tibiae black 2 2. Abdominal segments never marked with white 3 Abdominal segments always marked at sides with white.... 5 3. Abdomen steel blue 4 Abdomen for the most part rufous (male) . .americana var. laportei 4. Wings for the most part hyaline; body steel-blue, with tarsi and antennae beyond second segment yellow; head and thorax clothed with long black hairs (male). Length 20 mm americana 5. Abdomen almost wholly steel-blue, with obscure spots on each side of fifth or fifth and sixth abdominal segments ; body steel-blue, with the tarsi and the antennae beyond the second segment, yellow; head and thorax more or less covered with long black hairs. Length 20-25 ™™- (female) .'.americana Abdomen steel-blue, with three or more distinct white spots 6 6. Abdomen with a white spot on each side of third, fourth, and fifth segments; wings violaceous (female) americana var. nortoni Abdomen with more than three segments marked with white 7 7. Abdominal segments marked with small rounded spots 8 Abdominal segments marked with broad transverse bands... 9 8. Abdomen with white spots on each side of segments two to five; wings violaceous (female) americana var. luctifera Abdomen with white spots on each side of segments two to six; wings hyaline (female) americana var. decimaculata 9. Abdomen with white bands on segments two to six; wings violaceous (female) americana var. dahlbomii Abdomen with white bands on segments two to seven, fre- quently meeting at middle; wings hyaline (female) americana var. alba °C. semidea Cresson. C. americana var. laportei LePeletier. New^ Haven (F. E. Willits). C. americana Leach. Howard, Insect Book, PI. xii, Fig. 4 (male), Fig. 44, p. 74 (female). Larva feeds on vvrillow, elm, poplar, alder, maple, and linden. Connecticut (E. N.) ; New Haven, 2 June, 1904 (H. L. V.) ; Woodmont (W. E. B.) ; Stonington, August, 1907 (G. H. Hollister). *C. americana var. nortoni MacGillivray. Howard, Insect Book, PI. xii. Fig. i, Connecticut (E. N.). °C. americana var. luctifera Kirby. No. 22.] HYMENOPTERA OF CONNECTICUT. IO5 °C. americana var. decimaculata Norton. °C. americana var. dahlbomii Guerin-Meneville. °C. americana var. alba Norton. HOPLOCAMPIN^. Key to Genera. 1. Claws bifid 3 Claws never bifid 2 2. Claws simple, without a tooth on their inner margin Marlattia p. 105 Claws with a minute, erect tooth at middle . . .Hoplocampa p. 105 3. Front wings with the transverse part of M2 received in cell Ri some distance before the free part of the vein R5 Craterocercus p. 105 Front wings with the transverse part of M2 either interstitial with the free part of R5 or received in cell R5 . . . .Hemichroa p. 106 Marlattia Ash mead. °M. laricis (Marlatt). Hemichroa laricis Marlatt. Body black, with the mouth-parts scarcely paler than the body- color or slightly reddish ; tegulse and legs beyond the coxse strong- ly infuscated, pallid; wings infuscated; clypeus broadly, shal- lowly emarginate with a strong transverse ridge near the base; pentagonal area distinct, ridges somewhat rounded, median fovea shallow and circular; antennas with fourth segment much longer than third; saw-guides short and rounded at tip. Length 5.5 mm. Larva feeds on larch. Hoplocampa Hartig, H. halcyon Norton. Body ochreous, with the mesonotum, metanotum, and ter- gum of the abdomen black, or body sometimes entirely ochre- ous ; clypeus distinctly emarginate ; pentagonal area and me- dian fovea wanting; third segment of the antennae longer than the fourth, tooth of claws minute. Length 3.5 mm. Lyme, 14 May, 191 1 (A, B. C). Craterocercus Rohwer. Key to Species. I. Mesonotum and collar marked with white 2 Mesonotum and collar black; body black, with legs beyond femora white; third segment of antennae shorter than I06 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [BuU. fourth; clypeus distinctly emarginate; median fovea large, shallow, circular; wings infuscated on basal half. Length 6 mm infuscatus 2. Basal plates black 3 Basal plates white; body black, with edge of clypeus, labrum, tegulae, collar, median lobe of mesonotum, lateral lobes in part, a band on the four basal segments of the tergum, edge of three apical segments, and legs, except a band on hind femora and the hind tarsi, white; third and fourth seg- ments of antennas subequal. Length 6 mm. (female) albidovariatus 3. Median lobe of mesonotum in great part white (male) albidovariatus Median lobe of mesonotum with white lines, short and obscure phjrtophagicus °C. infuscatus MacGillivray. °C. albidovariatus (Norton). Hemichroa alhidovariata Nor- ton. Howard, Insect Book, PI. xiv, Fig. 19 (female). Larva feeds on black oak. °C. phytophagicus (Dyar). Hemichroa phytophagica Dyar. Larva feeds on white oak. Hemichroa Stephens. °H. americana (Provancher). Dineura americana Provan- cher. Scutelkim polished, impimctate ; body of female rufous, with metathorax, antennae, coxse, trochanters, front femora at base, middle and posterior femora, tibiae at tip, tarsi, and saw-guides, black ; tibiae white ; wings infuscated, paler at apex ; pentagonal area indistinct, walls flat; median fovea shallow, elongate; third and fourth segments of the antennae subequal ; body of male black, with legs beyond coxae and tegulae rufous. Length 5.7 mm. Larva feeds on alder; gregarious. H. fraternalis Norton. Scutellum uniformly finely punctate; body of female with the median lobe of the mesonotum, the lateral lobes in part, a large spot on the mesopleurae, the venter of the abdomen, the basal plates, and more or less of each of the other tergal segments,, rufous ; prothorax for the most part, the tegulse, the legs except the posterior femora, and the costa and stigma, white; No. 22.] HYMENOPTERA OF CONNECTICUT. IO7 male differs in lacking the rufous and in having the femora in great part black. Length 9 mm. Larva feeds on white oak. New Haven, 1907 (A. D. Reid), 21 May, 1910 (A. B. C.) ; Lyme i May, 1910 (A. B. C). DlNEURIN^. Key to Genera. Front wings with transverse part of M2 interstitial with free part of Rj; free part of Sci situated before the medio-cubital cross-vein Mesoneura p. 107 Front wings with transverse part of JNL received in cell Ru and never interstitial with free part of vein R5; free part of Sci interstitial with or situated beyond the medio-cubital cross-vein Dineura p. 107 Mesoneura Hartig. *M. parva (Norton). Dineura parva Norton. Body black, with the tegulfle and the apex of the venter pic- eous ; legs yellow-rufous ; wings hyaline, the veins brown ; an- tennae filiform, third and fourth segments subequal; head without depressions about ocelli ; clypeus truncate. Length 4 mm. Farmington (E. N.). Dineura Dahlbom. Key to Species. 1. Antennae with third segment longer than or subequal to fourth 2 Antennae with third segment shorter than fourth; body black, with legs beyond base of femora and apex of venter rufo- testaceous; wings hyaline, iridescent, veins brown, costal vein and stigma dull luteous. Length 5 mm luteipes 2. jNIesonotum more or less marked with rufous; body black, with prothorax, tegulae, side lobes of mesonotum, pleurae, legs, and apex of abdomen, rufous; wings hyaline, stigma pale, cell Ri almost square. Length 5 mm linita Mesonotum wholly black; body black, with tegulae, collar, large spot on pleurae, legs, apical half of tergum, and apical two-thirds of venter, rufous;- basal half of stigma white ; cell R4 longer than wide. Length 4.5 mm lateralis °D. luteipes Cresson. °D. linita Norton. °D. lateralis Norton. Io8 CONNECTICUT GEOL. AND NAT, HIST. SURVEY. [Bull. MONOCTENIN^ Monoctenus Dahlbom. Front wings with medio-cubital cross- vein in the angle between R -f- M and M ; the free part of 2nd A wanting and the anal veins anastomosing at middle ; radial cross-vein wanting ; the antennas with more than nine segments. °M. fulvus (Norton.) Lophyrus fulvus Norton. How^ard, Insect Book, PI. xiv, Figs 11 and 16. Body rufous, with a lunate mark about the ocelli, the an- tennae, a spot on each lateral lobe, the metathorax in great part, the dorsal part of the mesopleurae, the ventral margin of the mesopleurae, the pectus, the venter of the abdomen, the basal plates and the first abdominal segment, black; varies until practically entire body except legs is black; antennae with a variable number of segments. Length 8 mm. Cladiin^. Key to Genera. 1. Front wings with transverse part of M2 received in cell R4 . . 3 Front wings with transverse part of Ms received in cell R5. . 2 2. Claws simple Anoplonyx p. 108 Claws bifid Platycampus p. 109 3. Hind wings without an appendage at the apex of cell R1+2 .... Priophorus p. 109 Hind wings with an appendage at the apex of cell R1+2 4 4. Front and middle metatarsi never more than one-half the length of their tibiae; tarsal segments all of practically the same width throughout, segmentation indistinct; an- tennae of male with prominent branches or projections at tip of basal segments at least Cladius p. no Front and middle metatarsi never more than one-third the length of their tibiae; tarsal segments distinctly broader at apex than at base, segmentation very distinct; antennae never with projections at apices of segments, male with a blunt projection at base of third segment beneath Trichiocampus p. no Anoplonyx Marlatt. °A. canadensis Harrington. Body black, with edge of the clypeus, labrum, mandibles, tegulae, and legs except coxae, pale honey-yellow ; veins, includ- No. 22.] HYMENOPTERA OF CONNECTICUT. ' IO9 ing costa and stigma, pale ; body impunctate, pentagonal area distinct, not strongly marked ; antennal segments three to five sub-equal ; clypeus emarginate. Length 5 mm. Platycampus Schiodte. °P. americanus (Marlatt). Camponiscus americanus Marlatt. Body rufous, with the antennae above, spot about ocelli, tip of scutellum, postscutellum, metathorax more or less, hind coxae, base of abdomen beneath, mesopleurae more or less, femora more or less, apex of hind tibiae, and hind tarsi, brownish or infus- cated; pentagonal area sharply defined; frontal ridge strong, un- broken ; median fovea broad and deep ; antennal segments three and four subequal. Length 5-6 mm. Larva feeds on poplar. Priophorus Latreille. Key to Species. 1. Frontal crest never large and prominent and never extending laterally to eyes; entire free part of Sci always distinct. ... 2 Frontal crest large and prominent, extending laterally to eyes; free part of Sci almost entirely atrophied; body black, with legs beyond knees semi-resinous to brown; clypeus transverse, deeply emarginate; antennal furrow extending as a groove along lateral margin of antenna to about the middle of the front, where it is interrupted by the frontal crest, then continued as a short groove behind the lateral ocelli; median fovea triangular, flat. Length 6 mm. y simplicicomis 2. Frontal crest distinct or subdistinct; color black, with apical half of legs paler 3 Frontal crest wanting; ocellar furrow distinct; body resinous, with head except mouth, antennae except two basal seg- ments, and mesonotum and metanotum, black; clypeus shallowly emarginate with rounded lateral angles; antennal furrow continuous; median fovea shallow and indefinite; pentagonal area wanting; third antennal segment longer than fourth. Length 4 mm acericaulis 3. Frontal crest broken by median fovea; sides of ocellar basin scarcely indicated; ocellar furrow distinct; body black, with legs beyond knees, four hind trochanters, and anterior femora on the sides, white; clypeus transverse and deeply emarginate; median fovea deeply concave; third and fourth antennal segments subequal. Length 6 mm aequalis no CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. Frontal crest entire, not broken by median fovea; sides of ocellar basin clearly distinguishable; ocellar furrow scarcely indicated; body black, with legs beyond knees white; clypeus transverse, deeply and roundly emarginate, lateral angles prominent; median fovea large, broad, shield- shaped; third and fourth antennal segments subequal. Length 7 mm solitaris P. simplicicornis (Norton). Cladhis simplicicornis Norton. New Haven (A. E. V.) *P. acericaulis IMacGillivray. Larva a borer in the leaf- stems of the sugar maple. New Haven, Stonington (W. E. B.) ; Southington, New Haven (B. H. W.). *P. aequalis (Norton). Cladius cequalis Norton. Farmington (E. N.). °P. solitaris (Dyar). Larva feeds on alder. Cladius Illiger, C. pectinicornis Fourcroy. Cladius isomera Norton. How- ard, Insect Book, PI. xii, Fig. 19. Body black, with the legs beyond the knees and the costa whitish ; third segment of the antenna shorter than the fourth ; clypeus transverse, broad, shallowly emarginate ; pentagonal area indistinct ; frontal crest distinct and broadly broken ; median fo- vea broad, flat, indistinct; antennse of the male with projections at the apex of segments three to six, largest at base. Length 6-8 mm. Larva feeds on rose. Farmington (E. N.) ; New Haven (H. L. V.), 6, 29 July, 1910 (W. E. B.) ; Orange, 21 May, 191 1 (A. B. C). Trichiocampus Hartig. T. viminalis Fallen. Auliacomcrus lutesccns Lintner. Abdomen rufous ; body black, with the antennae, the legs, the pleurse broadly, and the abdomen, rufous ; third segment of the antennae not as long as the fourth ; pentagonal area distinct, the frontal crest broken, the median fovea large, elongate ; basal two-thirds of the wings infuscated. Length 10 mm. Larva feeds on Populus monilifera. New Haven (W. E. B.) °T. gregarius Dyar. Abdomen black ; body black, with the front and middle legs beyond the middle of their femora and the hind legs beyond the No. 22.] HYMENOPTERA OF CONNECTICUT. Ill femora white; third and fourth segments of the antennae subequal ; pentagonal area distinct, the 'frontal crest slightly- broken, the median fovea small, circular ; basal two-thirds of the wings dark, smoky black. Length 6 mm. Larva feeds on Populus tremuloides. Nematin^.* The types of the following species are not accessible and it is impossible to locate them in the tables. Nematus (Pteronus?) longicornus Say. Body black, with the postgense, orbits, face below the anten- nae, the tegulae, the angles of the pronotum, the pleurae except two black spots, the body beneath, and the legs (except the api- cal half of the hind femora, their tibiae, and their tarsi), whitish; antennal segments three and four subequal ; clypeus angulately emarginate ; male with the antennae pale fulvous beneath ; the third segment shorter than the fourth and curved at base. Length 12 mm. Connecticut (E. N.). *Nematus (Pachynematus) nigritus Norton. Body black, with the postgenae, the clypeus, the labrum, the tegulae, and the apex of the abdomen above and below, yellowish ; the trochanters, the apical half of the femora, the tibiae except the tips and base of the hind pair, reddish white; antennae with the third segment shorter than the fourth ; clypeus hardly emarginate. Length 12 mm. Connecticut (E. N.). Key to Genera. 1. Claws simple, without a tooth ; clypeus emarginate ; head with frontal area indistinct or wanting Diphadnus p. 112 Claws with a tooth 2 2. Claws with a small, erect tooth at middle 3 Claws cleft at apex, the two rays usually subequal in length. . 5 3. Clypeus emarginate, sometimes very slightly; vertex with a fairly distinct frontal area; radio-medial cross-vein always present Pachynematus p. 1 15 •In the preparation of the tables dealing with this subfamily free use has been made of a paper by C. L. Marlatt, "Revision of the Nematinae of North America," Bull. No. 3, Technical Series, Bureau of Entomology, U. S. Dept. of Agriculture. 112 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. Clypeus squarely truncate; radio-medial cross-vein usually wanting .• 4 4. Frontal area of head more or less distinct; saw-guides sim- ple; elongate species Lygaeonematus p. 115 Frontal area entirely wanting; saw-guides with a distinct scopa; short, ovate species Pristiphora p. 113 5. Front wings with free part of Rs always present and the cells Rs and R. therefore always separate 6 Front wings with free part of R5 always wanting and the cells Rb and R4 therefore always united Euura p. 141 6. Antennae of female filiform, of practically the same width throughout; eighth dorsal segment of abdomen of male with a small, blunt, more or less awl-shaped projection; small species Pontania p. 137 Antennae of female setaceous, distinctly tapering toward apex; eighth dorsal segment of abdomen of male with a broad, obtusely pointed projection, or not at all produced at the tip; usually larger than 5 mm 7 7. Hind tibiae at apex and hind metatarsus not strongly com- pressed and flattened 8 Hind tibiae at apex and hind metatarsus strongly, foliaceously compressed and flattened Crcesus p. 121 8. Head with frontal area distinct; thorax shining, smooth, at most sparsely punctate ; head triangular when viewed in front 9 Head with frontal area wanting; thorax opaque, with dense, fine punctures ; head round when viewed in front Amauronematus p. 121 9. Male with the last ventral abdominal segment obtusely trian- gularly produced at the apex; saw-guides of female of the usual form Pteronidea p. 124 Male with the last ventral abdominal segment excavated at the tip, and not obtusely triangularly produced at the apex; saw-guides of female very broad, large, and thickened .... Nematus p. 120 Diphadnus Hartig. Key to Species. I. Pronotum with angles broadly yellow 2 Pronotum with angles black; vertex smooth, shining, frontal crest almost obsolete; third antennal segment longer than fourth; median fovea very minute, circular; saw-guides scarcely projecting, tapering, rather densely clothed with hairs; body shining black, with tegulae and legs light yel- lowish; bases of coxae and anterior femora somewhat in- fuscated; antennae pale beneath. Length 5 mm appendiculatus No. 22. J HYMENOPTERA OF CONNECTICUT. II3 2. Clypeus and labrum black; head densely punctate, opaque; clypeus very slightly emarginate beneath and acuminate at tip; body black, with angles of pronotum, tegulse, tro- chanters, apices of femora, especially the front pair, tibiae, and tarsi, yellowish ferruginous; posterior tibiae and tarsi somewhat infuscatcd. Length 4.5 mm calif omicus Clypeus and labrum pale; head and thorax punctate; clypeus squarely truncate; frontal crest rounded, almost wanting; antennal segments three to five subequal; procidentia very broad, obtusely, strongly keeled; body black, with clypeus, labrum, and mouth-parts pallid; angles of pro- notum, tegulae, more or less of apical half of femora, anterior tibiae and tarsi, and basal two-thirds of tibise, yel- lowish. Length 5.5 mm proximatus D. appendiculatus (Hartig). Pristiphora grossularia Walsh. Gymnonychus appendiculatus Hartig. Larva feeds on goose- berry. New Haven. 21 April, 1896 (W. E. B.) ; Orange, 13 April 1911 (B. H. W.). D. californicus (Marlatt), Gymnonychus calif omicus Mar- latt. Larva feeds on pear. New Haven (H. L. V.), *D. proximatus (Norton). Nematus proximatus Norton. Gymnonychus proximatus Norton. Connecticut (E. N.). Pristiphora Latreille. Key to Species. 1. Thorax and abdomen black 2 Thorax or abdomen or both in part pale 3. 2. Head small, narrow, and not much more than half the width of thorax; vertex smooth, ridges rounded, sub-obsolete; median fovea minute and circular; third antennal segment longer than fourth; body shining black, with anterior and middle tibiae and tarsi yellowish; posterior tibis with basal two-thirds whitish. Length 5 mm sycophanta Head nearly as wide as thorax; vertex without ridges and deeply, coarsely punctate; third antennal segment longer than fourth; body shining black, with apex of clypeus, labrum, tegulje in the female, apices of coxae, trochanters, and tibiae in great part, pallid; anterior tarsi somewhat infus- catcd; apical half of posterior tibiae and tarsi black. Length 5 mm banksi 3. Abdomen entirely black on the dorsum 4 Abdomen in part pale on the dorsum 6 8 '114 CONNECTICUT GEOL. AND NAT, HIST. SURVEY. [Bull. 4. Abdomen with venter pale; vertex w^ithout ridges and some- what roughened with minute tubercles; median fovea shal- low or nearly wanting; procidentia broad and strongly- keeled; body shining black, with clypeus, mouth-parts, pronotum, tegulae, legs, and central area of abdomen on venter, pale yellowish; apical half of posterior tibiae and their tarsi, brownish black. Length 5 mm carolinensis Abdomen with venter black 5 5. Pronotum and tegulse pale; head and thorax strongly punc- tate ; ocellar and frontal ridges sub-obsolete ; median fovea broad and shallow; antennal segments three to five sub- equal; procidentia broad, slightly excavated at tip, not projecting; hypopygium notched at tip; body black, with clypeus, labrum, bases of mandibles, palpi, legs in great part, pronotum, and tegulae, yellowish ferruginous; tips of posterior tibiae and tarsi fuscous. Length 6 mm luteola Pronotum and tegulae black (See sec. 7) idiota 6. Body reddish orange marked with black; head densely and finely, tuberculately granulate, opaque, clothed with setae; ridges of ocellar basin and frontal crest almost wanting; antennal segments three to five subequal; clypeus, labrum, and bases of mandibles inclined to pallid; vertex in great part, antennae, stripes on lobes of mesonotum, scutellum, metanotum, sides of first abdominal segment, other seg- ments along the middle of dorsum, lower part of pleurae, and saw-guides, black or dark brown; tips of hind tibiae and hind tarsi infuscated. Length 6.5 mm bivittata Body black, marked with yellow 7 7. Abdominal segments two to five, usually only on sides, yellow; head with coarse, deep punctures; ridges of ocellar basin rounded, nearly obsolete; third antennal segment much longer than fourth, fourth and fifth segments subequal; saw-guides rather slender, rounded at tip, with a dense bordering fringe of hairs; body shining black, with clypeus, tegulae, legs, and abdominal segments two to five, usually interrupted at middle, yellow ; femora usually brown basall}' and apically; tips of posterior tibiae and their tarsi brown or black. Length 5 mm idiota Abdomen with segments one to four entirely reddish yellow; head with dense, coarse punctures; frontal crest slightly elevated; median fovea shallow; third antennal segment longer than fourth; saw-guides not very broad, rounded at apex, with dense bordering hairs ; body shining black, with clypeus, outer half of pronotum, tegulae, abdominal segments one to four, and legs, reddish yellow; apical third of posterior * tibiae and their tarsi black. Length 5.5 mm dyari No. 22.] HYMENOPTERA OF CONNECTICUT. IIC P. sycophanta Walsh. Pristiphora tibialis Norton. Larva feeds on willow, birch, and Vaccinium. Connecticut (E. N.). °P. banksi Marlatt. °P. carolinensis Marlatt. P. luteola (Norton). Nematus luteolus Norton. Farmington (E. N.). °P. idiota Norton. Pristiphora identidem Norton. Larva feeds on Vaccinium. P. bivittata (Norton). Nematus bivittatus Norton. Larva feeds on Spircca. Connecticut (E. N.). °P. dyari Marlatt. Lygaeonematus Konow. L. erichsoni Hartig. Nematus erichsoni Hartig. Nematus notabilis Cresson. Larch Sawfly. Howard, Insect Book, PI. xii, Fig. i6. Head and thorax finely punctate, entire body shiny; ridges of ocellar basin and frontal crest rounded and distinct; median fo- vea long, shallow, deepest at apex ; antennal segments three and four subequal ; saw-guides broad, rounded, truncate at tip ; body black, with tip of clypeus, basal two-thirds of tibiae, apices of trochanters, and angles of pronotum, whitish ; femora, tips of anterior tibiae and their tarsi, and four basal segments of abdomen, orange rufous ; malcj with procidentia strongly keeled, somewhat constricted basally, short, not projecting beyond the seventh dorsal segment, and the hypopygium slightly emarginate at apex. Length 8-ii mm. Larva feeds on European and American larch (Larix). New Canaan, North Canaan, Union, and Woodstock, 191 5. Pachynematus Konow. Key to Species. 1. Males 15 Females 2 2. Saw-guides large, projecting free for at least one-half of their length J Saw-guides normal, projecting but slightly, at least never for one-half of their length 4 3. Body black or dark brown; ocellar basin with distinct but not strongly elevated walls; frontal crest not strongly Il6 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. raised, slightly broken at middle; antennae with third seg- ment much shorter than fourth; saw-guides long, rounded at apex, blades thin and closely applied; body brownish black, with abdomen lighter, inclined to fulvous; face below antennae, the upper and posterior orbits, pronotum, tegulae, and legs except bases of coxae, reddish yellow, strongly in- fuscated. Length 8 mm dimmockii Body in great part yellow or resinous; ocellar basin with distinct and broad lateral walls; frontal crest strong and unbroken; antennal segments three and four subequal; saw-guides long and large, broadly rounded at apex, blades thin, translucent, closely applied; body shining resinous yellow, with antennae, spot on lateral lobes of mesonotum, apex of scutellum, metanotum in part, and narrow border to basal plates, brownish black. Length 8.5 mm ocreatus 4. Head strongly developed and dilated behind compound eyes 5 Head narrowed more or less behind compound eyes 10 5. Head and mesonotum in great part pale 6 Head black, with orbits black or strongly infuscated; thorax in great part black 9 6. Ocellar basin with strong, distinctly defined sides; frontal crest strong, very minutely notched; median fovea extending laterally over bases of antennae; saw-guides moderately broad and thick, obliquely truncate, upper edge nearly straight; body lesinous or sulphur yellow, with antennae, a small spot including the ocelli, spot on lobes of mesonotum, spot on either side and base of scutellum, metanotum, tergum of abdomen except narrow lateral margin and two terminal segments, and saw-guides, brownish black. Length 7-8.5 mm extensicomis Ocellar basin with its sides and the frontal crest indistinct 7 7. Wings hyaline ; median fovea distinct 8 Wings infuscated; median fovea almost wanting; saw-guides narrow and pointed at tip, upper edge straight; body shin- ing honey-yellow, with antennae, a spot about the ocelli, spot on lobes of mesonotum, apex of scutellum, metanotum, cen- ter of basal plates, and bases of first six dorsal abdominal segments, black or fuscous. Length 6.5 mm suadus 8. Median fovea shallow, and extending widely over bases of antennae; antennae with fourth segment as long as or longer than third; saw-guides narrow, tapering, straight on upper margins, obtusely pointed ; body luteous, with an- tennae, a small spot including the ocelli, a spot on lateral lobes of mesonotum, scutellum in part, metanotum in part, basal plates, disk of tergum, and saw-guides, black; apices No. 22.] HYMENOPTERA OF CONNECTICUT. II7 of hind tibije and their tarsi, bases of hind coxae, and a small spot beneath anterior wings, infuscated ; stigma, costa, and veins at base, hyaline. Length 6 mm affinis Median fovea circular, not extending over bases of antennae; antennae with third and fourth segments subequal; saw- guides straight and oblique above, convex below, con- vexly rounded at apex to a blunt point above; body luteous, with a spot above the bases of antennae, around the ocelli, a broad band on median lobe of mesonotum, a nar- row band on each lateral lobe, an oblique band at their apices, apex of scutellum, all sometimes rufous, postscutel- lum, metathorax in part, basal plates, a spot on middle of first abdominal segment, apices of posterior tibiae, and posterior tarsi, black; stigma luteous, veins brownish. Length 8 mm ruf ocinctus 9. Stigma very narrow and acuminate; head and thorax with long, dense pubescence; ocellar basin rather indistinctly defined; frontal crest long and unbroken, median fovea triangular; saw-guides short, tapering, obtusely pointed; • body black, with tips of clypeus, mouth-parts, angles of pronotum, tegulae, tip of abdomen except saw-guides, and outer half of femora, reddish yellow; tibiae pale yellowish; tarsi infuscated; pleurae with a reddish mark. Length 8 mm pubescens Stigma broad and rounded beneath; head and thorax with short, inconspicuous pubescence; ocellar basin distinct, with sharp lateral walls; frontal crest not prominent and unbroken; median fovea oval; saw-guides short and taper- ing; body black, with labrum, angles of pronotum, tegulae, tip of abdomen, venter in great part, and legs, yellowish or reddish; bases of coxje and of femora infuscated. Length 8 mm montivagus ID. Tergum of abdomen reddish yellow; head and thorax strongly punctate; ocellar basin with prominent, elevated ridges; frontal crest prominent and unbroken; saw-guides broad and truncate; body black, with posterior orbits, and notum in part including the scutellum, reddish; supraclyp- eal area, tip of clypeus, labrum, pronotum, tegulae, legs, and abdomen, reddish yellow; tips of posterior tibiae and posterior tarsi infuscated. Length 6.5 mm punctulatus Tergum of abdomen black or brown 11 11. Femora entirely pale 12 Femora wholly, or at least some of them in part, black 13 12. Head and thorax black; body black, with clypeus, labrum, collar, tegulae, legs beyond coxae except apex of posterior tibiae and posterior tarsi for the most part, and venter of the abdomen, white or luteous ; head distinctly punctate ; cly- Il8 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. peus deeply and narrowly emarginate; frontal crest un- broken; third and fourth segments of antennas subequal; saw-guides oblique above and below and obliquely trun- cated at apex. Length 7 mm corticosus Head and thorax dark brown; body black, with head, anten- na, pronotum, mesonotum, and dorsum of abdomen more or less, upper half of pleura, and saw-guides, dark brown; clypeus broadly and shallowly emarginate; frontal crest unbroken; antennae with third segment longer than fourth; saw-guides short, obliquely truncate, pointed at tip. Length 4.3 mm gregarius 33. Anterior pair of legs entirely pale; vertex finely tuberculate; ocellar basin with lateral walls minutely but sharply raised, obsolete posteriorly; frontal crest acutely elevated, angu- lated, and extending nearly to inner orbits; median fovea broad, extending on each side over bases of antennae; saw- guides broad, straight on upper margins, obliquely truncated at apex, bordering hairs minute and scattering; body shining black, with apex of clypeus, mouth-parts, pronotum in great part, tegulae, anterior pair of legs, posterior pair of legs except bases of coxae and apices of femora and tibiae and all of tarsi, venter of abdomen except at apex, lateral margin and more or less of apex of tergum, j^ellowish white. Length 6-7 m.m comiger Anterior pair of legs more or less marked with black 14 14. Frontal crest strongly developed, slightly broken at center, and not reaching inner orbits; ocellar basin with distinct sides but not strongly elevated; median fovea distinct, broadening posteriorly into a suture beneath the frontal crest; saw-guides rather broad, rounded, truncate at apex, straight on upper margins; body black, with tip of the clyp- eus, labrum, angles of pronotum, tegulae, coxae except at base, trochanters, bases of femora and tips of anterior femora, tibije except tips of posterior pair, anterior tarsi, and venter except laterally at base and apex, pallid. Length 8 mm subalbatus Frontal crest distinctly elevated and unbroken, extending nearly to the inner orbits; ocellar basin with sides rounded, not strongly raised, and indistinct; median fovea large, circular, deeply excavated; saw-guides rather slender, somewhat pointed at tip, dorsal margin nearly straight; body black, with labrum, bases of mandibles, angles of pronotum, tegulae. coxae except at base, trochanters, tibiae of anterior pair of legs and their tarsi, and venter of ab- domen, yellowish or pallid. Length 6 mm palliventris 15. Head strongly dilated behind the compound eyes 16 Head not stronglj' dilated behind the compound eyes 22 No. 22.] HYMENOPTERA OF CONNECTICUT. 1 19 36. Body black 011 dorsum and venter 17 Body black, with venter and more or less of dorsum pale . . 21 17. Head and thorax covered with long, dense pubescence; stigma narrow and acuminate ; procidentia wide, tapering, truncate at tip. Length 8 mm pubescens Head and thorax not covered with long, dense pubescence; stigma broad and tapering 18 38. Legs pale beyond apices of femora 20 Legs pale beyond bases of femora 19 19. Procidentia longer than broad, truncate at apex ; head with ocellar basin and frontal crest distinct but not strongly raised; body shining black, with supraclypeal area, labrum, apex of abdomen above, hypopygium, more or less of venter on each side, apices of coxse, trochanters, femora except bases, and tibiae except apices, light fulvous. Length 5.5 mm tritici Procidentia broader than long, broadly rounded; ocellar basin distinct, sharply raised; body black, with supraclyp- eal area, labrum, apices of segments of tergum, venter, a spot on pleurse, and legs, except apices of posterior tibiae and their tarsi, fulvous. Length 7 mm rufocinctus 20. Mouth-parts and orbits black; procidentia very broad, slightly tapering and rounded at tip extensicomis Mouth-parts and orbits pale; procidentia projecting only about half its width, broadly truncate at apex affinis 21. Procidentia narrow, .tapering, pointed at top; body resin- ous yellow, with antennae, large spot on vertex about ocelli extending onto occiput, thorax above except pronotum and tegulae, and central dorsal area of abdomen, brownish black. Length 4 mm gregarius Procidentia very broad, tapering, squarely truncate at apex, not keeled; vertex rugose; ocellar basin with indistinct walls, median fovea extending laterally over bases of an- tennae, indistinctly defined; body black, with labrum, upper and posterior orbits, angles of pronotum, teguls, outer two-thirds of femora, tibiae, tarsi, and abdomen except base of first dorsal segment, yellowish ferruginous; wings smoky, especially centrally. Length 8 mm infumatus 22. Procidentia rounded at apex, not constricted basally, strongly keeled; body black, with tip of clypeus, mouth-parts, angles of pronotum, tegulae, pectus, venter of abdomen, and legs except bases of coxae and apices of posterior tibiae and tarsi, yellowish ferruginous. Length 5 mm comiger Procidentia short, narrow, truncate; body black, with tip of clypeus, mouth-parts, angles of pronotum, venter, and legs except bases of coxae, extreme tip of posterior tibiae, and all posterior tarsi, yellowish ferruginous. Length 6.5 mm subalbatus I20 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. °P. dimmockii (Cresson). Nematus dimmockii Cresson. °P. ocreatus (Harrington). Nematus ocreatus Harrington. P. extensicornis (Norton). Nematus extensicornis Norton. Nematus marylandicus Norton. Nematus aureo pectus Norton. Howard, Insect Book, p. 75, Fig. 46, PI. xiv, Fig. 29. Larva feeds on wheat. New Haven, 15 May, 191 1, Orange, 21 May, 1911 (A. B. C). P. affinis Marlatt. Larva feeds on grass. Stonington, 16 May, 1906 (B. H. W.). *P. rufocinctus MacGillivray. New Haven, 15 May, 1911, Orange, 21 May, 191 1 (A. B. C). °P. suadus (Cresson). Nematus suadus Cresson. °P. pubescens Marlatt. Larva feeds on Carex. °P. montivagus Marlatt. °P. punctulatus Marlatt. °P. corticosus MacGillivray. °P. gregarius Marlatt. Larva feeds on willow. *P. corniger (Norton)- Nematus corniger Norton. Larva feeds on grass. Connecticut (E. N.) ; Branford, 8 May, 1905 (H. W. W.). P. subalbatus (Norton). Nematus subalbatus Norton. Orange. 21 May, 1911 (A. B. C.) ; New Haven, 30 May, 1911 (B. H. W.). °P. palliventris (Cresson). Nematus palliventris Cresson. °P. tritici ]\Iarlatt. Larva feeds on wheat. °P. infumatus Marlatt. Nematus Jurine. Key to Species. I. Abdomen with last dorsal arc enormously developed; clypeus deeply, rather narrowly notched, lobes large and rounded; ocellar basin scarcely defined, deep furrow connecting an- terior ocellus with median fovea; saw-guides tapering, pointed, and with the terminal abdominal segment enor- mously developed, representing nearly half of abdomen; body uniformly reddish yellow. Length 7 mm unicolor Abdomen with last dorsal arc not enormously developed 2 No. 22.] HYMENOPTERA OF CONNECTICUT. 121 2. Ocellar basin with indistinct lateral walls and without tuber- cles; clypeus nearly truncate; frontal crest large and rounded; saw-guides thick, short, scarcely projecting, margined with long, not very numerous curved hairs; body yellowish ferruginous, with antennae, spot on either side of scutellum, metathorax in part, basal plates, and center of abdomen above, black; mesonotum, pleurae in part, margin of abdomen, and sheath, more or less reddish. Length 5 mm. chloreus Ocellar basin with distinct lateral walls and containing two small tubercles; clypeus broadly emarginate; frontal crest large, obtusely rounded; saw-guides thick, squarely trun- cate, tubular; body luteous, pallid or reddish yellow, with the sides of the mesonotum, most of the metanotum, and a broad stripe on the middle of the abdomen, black. Length 7 mm pergandei °N. unicolor Marlatt. Larva feeds on birch. *N. chloreus Norton. Larva feeds on Quercus coccinea. Connecticut (E. N.). °N. pergandei Marlatt. Croesus Leach. C. latitarsus Norton. PI. i, Fig. i. Mesothorax with confluent longitudinal punctures ; body blue-black, with the labrum, mandibles, palpi and the anterior pair of legs toward the tip, piceous ; posterior trochanters and the basal half of all the tibise white ; wings hyaline, with a smoky area beneath the stigma. Length 8 mm. Larva feeds on birch. New Haven, 1910 (B. H. W.) ; Stafford, 24 August, 1906 (W. E- B.). Common in New Haven, °C, laticulus Norton. Mesothorax with scattered, sub-obsolete, oval punctures ; body black, with tegulae, and a spot on the sides of the basal plates and of the second and third abdominal segments, whitish ; mandibles at apex, and legs, ferruginous, with apical two- thirds of their tibiae and greater part of metatarsi black; wings hyaline. Length 12 mm. Amauronematus Konow. Key to Species. I. Body black on dorsum 2 Body pale on dorsum, marked more or less with black 9 122 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 2. Wings smoky 3 Wings hyaline 6 3. Legs entirely black 4 Legs with tibiae yellowish, at least anterior pair in front 5 4. Abdomen with venter pale; clypeus almost truncate at apex; frontal crest and sides of ocellar basin nearly obsolete, indistinct; median fovea small, elongate; antennae with third segment shorter than fourth; procidentia very mi- nute and squarely truncate or broadly excavated at apex; body black, with clypeus, labrum, cheeks, and bases of mandibles, whitish; orbits tinged with rufous. Length 6.5- 7 mm concolor Abdomen with venter yellowish white; clypeus very shal- lowly emarginate; ocellar basin with rounded, indistinct walls, frontal crest almost wanting; median fovea shallow, elongate; antennal segments three to five subequal, the fourth longest; saw-guides obliquely truncate at apex; body black, with the oral region, outer orbits, supraclypeal area, pronotum in great part, and venter of abdomen, yel- lowish white. Length 9 mm comstockii 5. Clypeus rather broadly and shallowly emarginate; orbits pale; ocellar basin with distinctly defined walls; frontal crest narrow, not extending on each side, slightly broken by the deeply excavated, elongate median fovea; antennae with third segment shorter than fourth; saw-guides somewhat elongate, rounded at apex; body brownish black, with supraclypeal area, orbits, oral region, angles of pronotum, more or less of apical ventral segments, joints of legs, and most of anterior tibiae, yellowish. Length 8 mm gracilis Clypeus narrowly and rather deeply emarginate; orbits not pale; ocellar basin with its lateral walls rounded; frontal crest deeply broken by backward extension of deep, elon- gate median fovea; antennae with third segment shorter than either fourth or fifth; saw-guides elongate, slightly tapering, rounded at tip ; body black, with supraclypeal area, clypeus,' labrum, cheeks, base of mandibles, and angles of pronotum, yellowish white; anterior legs in front from middle of femora, yellov.'ish infuscated; venter of abdomen, except apex, yellowish. Length 9 mm similis 6. Abdomen black on venter 7 Abdomen pale on venter 8 7. Legs black except at joints; clypeus moderately and rather narrowly emarginate; ocellar basin with side walls rounded and indistinct; frontal crest not extending laterally, slightly broken by the shallow median fovea ; procidentia short, squarely truncate, with sharp angles, keeled ; body black. No. 22.] HYMENOPTERA OF CONNECTICUT. I23 with clypeus, oral region, and beneath the eyes, whitish; joints of legs, more or less of anterior face of tibiae and apices of femora, and angles of pronotum, yellowish. Length 5 mm cooki Legs reddish except apical half of posterior tibiae; clypeus broadly emarginate; ocellar basin distinctly defined but not deeply excavated; frontal crest not strongly developed; median fovea triangular; procidentia short, more than twice as broad as long, truncate; body entirely black except parts named. Length 9 »mm rufipes 8. Frontal crest strongly raised and unbroken; clypeus broadly and shallowly emarginate; ocellar basin with distinctly defined but not prominent walls; median fovea shallow, elongate oval ; saw-guides pointed, with a distinct scopa near the tip; body in female dull black, with face below an- tenna, orbits, pronotum, tegulse, pectus broadly, venter of abdo- men, lateral edge of dorsum, and some of the margins of the basal segments of the abdomen, pallid ; legs in part slightly infuscated; male differs in having dorsum of abdomen black and venter somewhat infuscated. Length 5.5 mm azalese Frontal crest broken (See sec. 5) similis 9. Abdomen black on dorsum; ocellar basin with side walls indis- tinct or wanting; frontal crest short, strongly raised, and scarcely broken; median fovea small, shallow, circular; saw-guides very broad, obliquely truncate, upper edge ob- tusely pointed; body luteous or reddish, with a spot on vertex extending to antennas, lobes of mesonotum at cen- ter, scutellum in part, metanotum, abdomen on dorsum, saw- guides, and lower half of pleurae, black. Length 6 mm fulvipes Abdomen yellow 10 10. Wings smoky; legs black; frontal crest and sides of ocellar basin indistinct; median fovea elongate, shallow; saw- guides elGngate, obtusely rounded at apex; body yellowish ferruginous, with the head and thorax in great part, center of the basal plates, apex of the abdomen, saw-guides, and legs, black. Length 8.5 mm luteotergum. Wings hyaline or nearly so ; legs pale il 3 1. Femora wholly or in part black; ocellar basin with indistinct walls; frontal crest large, sharply defined, slightly or not at all broken; median fovea triangular; saw-guides long, narrow, regularly and equally rounded on both margins to obtuse apex; body ferruginous or reddish, with anten- nae above, a line on anterior lobes of mesonotum, sometimes wanting, apex of scutellum, metanotum in great part, and abdomen dorsally at center, bJack. Length 7.5 mm. . .lineatus Femora resinous or yellow 12 124 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [BuU. 12. Frontal crest slightly broken; ocellar basin with rounded walls; median fovea elongate; saw-guides tapering on both edges, somewhat angularly, to an obtuse tip, smooth, margined with very short, scattering hairs; body light yellowish or reddish, with the antennie above black; tips of hind tibiae and their tarsi infuscated. Length 7 mm brunneus Frontal crest distinct and unbroken; ocellar basin with wide, rounded walls; median fovea circular, with branches ex- tending over bases of antennx; saw-guides tapering, ob- tusely pointed, clothed with short and rather dense hairs; body resinous yellow, thorax and head reddish; antennae, ring about ocelli, and postscutellum black. Length 6 mm. dyari *A. concolor (Norton). Nematus concolor Norton. Nematus violaceipcnnis Norton. Farmington (E. N.). , °A. comstocki JMarlatt. °A. gracilis Marlatt. °A. similis Marlatt. Larva feeds on willow. °A. cooki Marlatt. °A. rufipes Marlatt. °A. azaleae Marlatt. Larva feeds on Azalea. A. fulvipes (Norton). Nematus ftilvipes 'Norton. Connecti- cut (E. N.). A. luteotergum (Norton). Nematus luteotergum Norton. Larva feeds on alder. Connecticut (E. N.). °A. lineatus (Harrington). Nematus lineatus Harrington. °A. brunneus (Norton.) Nematus brunneus Norton. °A. dyari Marlatt. Larva feeds on poplar. Pteronidea Rohwer, Key to Species. 1. Females ^ Males 34 2. Dorsum of body black with pale markings 3 Dorsum of body pale with black markings 31 3. Pectus always black 4 Pectus usually entirely pale, rarely in part fuscous 20 4. Stigma narrow, more than three times as long as wide, usu- ally straight on lower margin S Stigma broad, not much more than twice as long as wide, rounded on lower margin 7 No. 22.] HYMENOPTERA OF CONNECTICUT. I25 5. Head, thorax, and abdomen black above; ocellar basin well- defined; frontal crest slightly notched at center; antennal segments three and four subequal; saw-guides broadly rounded on lower margin, pointed at tip; body black, with the area above bases of antennas, postgenae, orbits, mouth- parts, pronotum, tegulse, legs in great part, and venter of abdomen, pale; remainder of legs, veins, and stigma brown. Length 8 mm lata Head and thorax black, abdomen more or less pale 6 6. Abdomen with broad, lateral, pale stripe; sides of ocellar basin strongly and sharply raised; median fovea small, in- distinct; frontal crest very prominent, broadly curved, un- broken; saw-guides short, broad, obtusely pointed; body black, with clypeus and mouth-parts, most of pronotum, tegulse, lateral third of dorsum of abdomen, all of venter of abdomen, and legs, yellowish ferruginous; upper orbits and sides of mesonotum tinged with reddish. Length 7 mm. limbata Abdomen with a broad, transverse, yellow band; sides of ocellar basin and frontal crest strongly raised; median fovea large, oval, deeply excavated; antennal segments three and four subequal; saw-guides moderately robust, obtusely pointed, with straight upper margins ; body black, with tip of clypeus, labrum, bases of mandibles, palpi, and basal half of hind tibiae, whitish; upper margin of prono- tum, tegulae, dorsum of four basal abdominal segments except apex of fourth, all of venter, and legs, yellowish ferruginous. Length 8 mm latif asciata 7. Head and thorax black 8 Head and thorax in great part pale 19 8. Abdomen with venter pale, dorsum always more or less black, except sometimes the apical segments 9 Abdomen with venter and dorsum pale, except sometimes the basal dorsal segments and rarely the terminal segments 12 9. Femora all black; ocellar basin well defined; frontal crest large, indistinctly broken; antennae with third segment slightly longer than fourth; saw-guides pointed, slightly excavated above and rounded beneath; body brownish black, with inner and outer orbits, face below base of an- tennae, pronotum except two or three dusky spots, tegulae, front femora, sometimes almost entirely, tips of femora and tibiae, lateral edges of thorax and abdomen, and venter, yellowish white. Length 8 mm ventralis Femora wholly or in part pale 10 10. Femora of front and middle legs pale, of hind legs black; ocellar basin deep with well-defined walls; frontal crest unbroken; median fovea large, triangular, deeply exca- 126 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. vated; antennal segments three and four subequal; saw- guides broad, obtusely pointed, upper margin slightly emarginate; body black, with the face below the antennae, mouth-parts, orbits, angles of pronotufn narrowly, tegulse, nar- row apical margin of dorsal segments, two apical dorsal seg- ments, venter except epimera and some dusky spots on lateral margin of abdomen, and legs except apical half of posterior femora and apices of tibias and tarsi, yellowish. Length 5.5 mm marlattii Femora of all the legs pale 11 11. Hind wings with free part of R* and transverse part of Ma interstitial; ocellar basin distinctly defined; frontal crest strong, unbroken; median fovea deep, with lateral chan- nels running from it over bases of antennas; antennal seg- ments three and four nearly equal; body black, with tip of clypeus, mouth-parts, angles of pronotum, tegulse, legs in great part, venter of abdomen, and marginal third of dorsum of abdomen, yellowish. Length 7 mm harrihgtoni Hind wings with transverse part of M2 separating from R a con- siderable distance before free part of R4; ocellar basin with well defined walls ; frontal crest unbroken ; median fovea oval ; antennal segments three and four sub-equal ; saw-guides broad, tapering, slightly produced, with a rather dense tuft of short hairs at the extreme tip ; body black, with supraclypeal area, clypeus in great part, mouth-parts, tegulas, abdomen except broad dorsal stripe, and legs in great part, reddish yellow. Length 7 mm fylesi 12. Hind femora black, at least apically 13 Hind femora entirely pale 17 13. Head with orbits pale; ocellar basin with sharply defined walls; frontal crest distinct, unbroken; median fovea cir- cular; saw-guides smooth, polished, pointed, bordering hairs minute; body black, with clypeus, mouth-parts, angles of pronotum, tegulse, anterior and posterior legs (except apical three-fourths of hind femora, hind tibise, and tarsi), yellowish white; central part of mesonotum and scutellum sometimes yellowish brown; apical two-thirds of abdomen ferruginous; hind tibiae entirely brown, pale at base, and gradually darker towards apex, or white at base and grad- ually shading to brown. Length 7 mm tricolor Head with orbits black 14 14. Abdomen with apical segments black 15 Abdomen with apical segments rufous 16 15. Antennal segments three and four subequal; median fovea distinctly defined, oval; ocellar basin with sharply defined and strongly raised walls; frontal crest prominent, sharp, unbroken; saw-guides short, obtusely pointed, quite No. 22.] HYMENOPTERA OF CONNECTICUT, 12/ densely clothed with hairs; body black, with the center of the basal abdominal segment, the three following segments and part of the fourth, reddish yellow; tip of clypeus, mouth-parts, anterior legs in great part, coxae except at base, trochanters, bases of femora, and basal half of tibiae of hind legs, pallid; pronotum and tegulas pallid, infuscated. Length 8 mm. rufocincta Antennae with third segment longer than fourth; median fovea very shallow, indistinct; ocellar basin well-defined, with prominent anterior angle; saw-guides short, stout, scarcely projecting; body black, with angles of pronotum, tegulae, and abdominal segments one to five dorsally and ventrally, yellowish ferruginous; mouth-parts strongly in- fuscated; coxae except at base, trochanters, and basal half of posterior tibiae, whitish; anterior and posterior faces of anterior tibiae and tarsi pallid. Length 6 mm dyari 16. Head and thorax finely punctate; clypeus shallowly and broadly emarginate, lobes triangular and rather pointed; median fovea circular, deeply excavated; frontal crest and sides of ocellar basin strongly raised, frontal crest un- broken; saw-guides rather robust, rugose, with numerous hairs; body black, with tip of clypeus, labrum, palpi, angles of pronotum, tegulae, abdomen except basal plates, first seg- ment on dorsum, saw-guides, and legs (except bases of coxae, tips of hind femora, apical two-thirds of hind tibiae, and hind tarsi), rufous; basal third of hind tibiae, white. Length 7.5 mm erythrogastra Head and thorax rather coarsely punctate, somewhat shiny; clypeus very shallowly emarginate, lobes very short and broadly rounded; median fovea broad and shallow; frontal crest and sides of ocellar basin distinctly elevated; frontal crest rarely indistinctly broken; saw-guides not very robust, rounded at apex, and with rather long and dense hairs; body black, with bases of antennas, tip of clyp- eus, labrum, palpi, angles of pronotum, tegulas, legs (ex- cept apex of posterior femora, apical half of posterior tibiae, and hind tarsi), and abdomen except basal plates, yel- lowish ferruginous. Length d-"] mm corylus 17. Angles of pronotum and coxae black; walls of ocellar basin distinctly defined; frontal crest prominent, unbroken; me- dian fovea shallow; saw-guides robust, obtusely pointed, straight on the upper margins ; body black, with labrum pallid ; tips of anterior femora, hind femora, and abdomen except apical segment, orange-yellow, inclined to reddish on legs ; wings smoky. Length 8.5 mm fulvicrus Angles of pronotum and the coxae pale 18 128 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 18. Mesonotum with lateral lobes black, spotted with ferruginous; first abdominal segment black at base, ferruginous at apex; sides of ocellar basin distinctly raised; frontal crest prom- inent and unbroken; median fovea broad, shallow, not dis- tinctly defined; saw-guides rather broad, slightly excavated above, pointed, and with rather dense whitish hairs at tip; body black, with tip of clypeus, labrum, posterior orbits, angles of pronotum, tegulse, spot on the lateral lobes of meso- notum, abdomen beyond the middle of the first segment, and legs except the bases of the coxae and the hind tibiae and tarsi, yellowish ferruginous. Length 7 mm populi Mesonotum with the lateral lobes entirely and the entire first abdominal segment ferruginous; ocellar basin distinctly de- fined ; frontal crest very prominent, unbroken ; median fovea distinctly excavated, triangular; saw-guides narrow and taper- ing ; body black, with clypeus and labrum pale ; angles of pro- notum, tegulae, lateral lobes of mesonotum, abdomen except the basal plates and saw-guides, and legs except hind tibiae and tarsi, j^ellowish ferruginous. Length 10 mm hudsonii 19. Hind femora mostly black; ocellar basin distinct, with sharply raised sides; frontal crest broad, rounded, unbroken; me- dian fovea deep, circular; saw-guides strongly tapering toward the rounded apex, nearly straight on upper margins, with very short, inconspicuous pubescence; body yellow- ish or ferruginous, with base of antennae, spot about ocelli, occiput, pronotum except outer angles, spot on lobes of mesonotum, spot about the cenchri, basal plates, and first ab- dominal segment at base, black ; pectus, hind femora except at base, tips of hind tibiae, and hind tarsi, blackish brown. Length 6 mm antennata Hind femora entirely pale; ocellar basin with poorly defined walls; frontal crest entire or indistinctly broken; median fovea rather deep at apex, oval; saw-guides rather narrow, rounded at extremity, with short hairs ; body luteous or ferru- ginous, with head below antennae, except the supraclypeal area, orbits, more or less of antennae above, large spot on middle of lobes of mesonotum, scutellum more or less, lower part of pleurae, pectus, apices of posterior tibiae, and posterior tarsi, brownish black. Length 7-7-5 nim. ribesi 20. Head with the orbits not pale 21 Head with orbits pale 23 21. Mesonotum black ; ocellar basin distinctly defined, with prom- inent walls; frontal crest strongly bent anteriorly, scarcely broken centrally; median fovea triangular, deep, with sharp limiting ridges; sawi-guides short, rounded No. 22.] HYMENOPTERA OF CONNECTICUT. I29 at tip, slightly emarginate beneath, clothed with dark brownish hairs; body black, with supraclypeal area, clyp- eus, mouth-parts, pronotum, tegulae, pectus in great part, legs except apices of hind femora and tibiae and hind tarsi, and venter of abdomen, light resinous yellow; abdomen at sides, and central area interrupted at base and apex, yellow. Length 6 mm carpini Mesonotum, at least in part, pale 22 22. Median lobes of mesonotum in great part, and abdomen, black; frontal crest prominent, sometimes slightly broken; median fovea shallow, indistinct; saw-guides obtusely pointed, straight on upper edge, narrow; body ferruginous, with head except palpi and clypeus sometimes in part, margin of the pronotum, a band along middle of mesonotum, metanotum, metapleuras, basal plates, abdomen above, apices of posterior tibiae, and posterior tarsi, black. Length 7 mm militaris Median lobes of mesonotum and abdomen in great part red- dish; ocellar basin with rounded walls; frontal crest un- broken; median fovea shallow, circular; saw-guides rather short and robust, regularly rounded at tip; body reddish yellow, with antennae, head except tip of clypeus and more or less of mouth-parts, scutellum more or less, metanotum, center of basal dorsal area of abdomen, and saw-guides, black. Length 6 mm thoracica 23. Stigma and costa brown 24 Stigma and costa yellowish hyaline 28 24. Scutellum black 25 Scutellum pale 27 25. Frontal crest unbroken; ocellar basin with distinctly limit- ing walls; median fovea deep and triangular; saw-guides short, rather robust, regularly tapering; body light green- ish yellow, with antennae, large spot about the ocelli extending onto the occiput, lobes of mesonotum, metanotum, large spot on upper angles of pleurae, base of dorsal abdominal seg- ments centrally, apex of saw-guides, apex of hind femora, apical two-thirds of hind tibiae, and hind tarsi, black. Length 6 mm ostryae Frontal crest broad, slightly broken at middle 26 26. Head nearly spherical when viewed laterally; clypeus rather narrowly and deeply emarginate; ocellar basin distinctly defined, sides acute, finely raised; frontal crest broad, somewhat broken at middle; median fovea broad, circular, shallow; saw-guides narrow, rounded at apex; body pal- lid or resinous, with antennae, spot on vertex, including the ocelli and extending onto the occiput, mesonotum, metanotum, 9 130 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. abdomen on dorsum except narrow lateral margin, and apex of saw-guides, black; scutellum at base, and suture of mesonotum, inclined to reddish. Length 5.5 mm odorata Head triangular in outline when viewed laterally; clypeus broadly, circularly emarginate, lobes rounded, not broad; ocellar basin deeply and distinctly excavated, lateral walls rounded; frontal crest strongly developed, divided by a narrow depressed line at middle ; median fovea deep ; saw- guides narrow, tapering to a rounded tip ; body pallid or resin- ous, with antenn^e, large spot covering vertex, dorsum of thorax, and abdomen except narrow lateral margin, black ; hind tarsi and saw-guides brown; hind tibiae darker at tip. Length 7 mm comelli 27. Posterior tibiae and tarsi dark brown; ocellar basin with distinctly defined sides; frontal crest distinct, unbroken, curving anteriorly; median fovea triangular, sharply de- fined; saw-guides narrow, smooth, tapering on both edges to rounded tip; body reddish yellow, with antennae, large spot on vertex extending onto occiput, mesonotum, small spot beneath anterior wings, metanotum except postscutellum and sutures and lateral margin, abdomen except lateral margin and apical segment, apical half of saw-guides, and posterior tibiae and tarsi, brownish black. Length 6.5-7 mn^ trilineata Posterior tibiae and tarsi resinous; ocellar basin distinctly defined, sides faintly raised; frontal crest stout; median fovea elongate, rather deeply excavated; saw-guides broad, obtusely pointed, densely hairy at apex and on lower margin ; body yellow ferruginous, with the antennae basally, spot on the head surrounding the ocelli and extending narrowly over the vertex, large spot on anterior lobe of mesonotum, apex of- scutellum, metanotum, and abdomen on dorsum except narrow lateral margin and more or less of some of the middle seg- ments at apex, black. Length 8 mm magna 28. Frontal crest broad, unbroken at middle 29 Frontal crest broad, broken at middle 30 29. Antennas with third segment longer than fourth; saw-guides robust, densely clothed with long, whitish hairs at apex on lower margin; clypeus nearly truncate; ocellar basin indistinctly defined, sides rounded: frontal crest broad, unbroken; median fovea defined only on anterior margin; body 3'ellowish or ferruginous, with a spot on the vertex ex- tending back over the occiput, mesonotum, metanotum, and dorsum of abdomen except a narrow lateral margin, black. Length 4.5 mm quercus Antennae with third segment shorter than fourth; saw-guides narrow, tapering to a rounded tip; clypeus very broadly but not deeply emarginate; ocellar basin with distinctly No. 22.] HYMENOPTERA OF CONNECTICUT. I3I defined walls; frontal crest prominent but not distinctly limited; body yellowish or pallid, with antennae, a large spot on the vertex, mesonotum, metanotum, and dorsum of abdomen, black. Length 7 mm hyalina 30. Scutellum wholly or in part black; saw-guides rather pointed, lower margin regularly pointed, upper margin straight or slightly concave, bordering hairs very minute; clypeus dis- tinctly but not very broadly emarginate; ocellar basin with sides distinctly, rather sharply raised; frontal crest rounded, broken at middle; median fovea circular, shallow; body light yellowish, with antennae, a spot on vertex ex- tending onto occiput, lobes of mesonotum except lateral edges, metanotum, and dorsum of abdomen centrally ex- cept apex of last segment, black or dark brown; hind tibiae and tarsi more or less infuscated. Length 6 mm. vertebrata Scutellum pale; saw-guides rather narrow, slightly concave above, rounded at apex; clypeus circularly emarginate; ocellar basin distinctly limited; frontal crest large, slightly broken at middle; median fovea expanding basally; body pallid or yellowish, with antennae above, spot on vertex extending to bases of antennae, center of lobes of mesono- tum, metanotum, and central portion of abdomen on dor- sum, brownish black; tibiae and tarsi slightly infuscated. Length 6-6.5 mm integra 31. Body entirely without black or brownish markings of any sort. Length 7 mm monochroma Body, at least in part, with black or brownish markings 32 32. Body greenish luteous, with first seven dorsal abdominal seg- ments, saw-guides, mesothorax in part, metathorax, spot on pleurae below wings, and two basal segments of anten- nae, black; clypeus hardly emarginate; tips of tarsi black- ish ; stigma and costa pale green. Length 7 mm stigmata Body yellow or pallid, without black or brownish band on dorsum of abdomen 33 33. Frontal crest prominent, broken at middle, or strongly bi- tuberculate; median fovea broad, shallow; clypeus broadly but not deeply notched; ocellar basin with distinctly de- fined but rounded lateral walls; saw-guides tapering, straight or slightly concave on upper margin; body light yellowish, with narrow border to ocelli, small spot on occiput, spots on lobes of mesonotum, sdmetimes wanting, apex of scutellum, and spot between cenchri, brownish black; costa and stigma greenish hyaline. Length 5-6 mm. mendica Frontal crest unbroken; median fovea deep, extending lat- erally over bases of antennae; clypeus deeply, circularly 132 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. emarginate; ocellar basin distinctly defined, lateral walls not very sharply raised ; saw-guides robust, obliquely truncate at tip; body light yellow or pallid, with spot connecting ocelli, antennae above, and anterior edge of cenchri, dark brown or black; lobes of mesonotum and head above, brownish purple; stigma yellow. Length 8 mm. pinguidorsum. 34. Procidentia very broad and large 35 Procidentia narrow, sometimes almost obsolete 36 35. Head including orbits black; clypeus shallowly and broadly emarginate; sides of ocellar basin and frontal area rounded, indistinct; procidentia very broad, one-third as wide as last segment, rounded at tip, strongly constricted basally; body black, with clypeus, mouth-parts, angles of pronotum, tegulse, narrow lateral margin of abdomen, posterior mar- gin of central segments, two terminal segments, venter of abdomen, and legs, yellowish ferruginous; apices of poste- rior tibise and their tarsi black. Length 6-7 mm longicomis Head with orbits reddish; procidentia very broad, as broad as long, constricted at base; body black or brownish, with mouth-parts, pronotum, tegulse, base of costa, legs except tips of posterior tibiae and their tarsi, abdomen beneath, and more or less of the sides of the tergum, luteous ; orbits, lat- eral lobes of mesonotum, and basal edges of scutellum, more or less rufous. Length 6 mm ribesi 36. Pectus black Zl Pectus and venter of abdomen pale 43 2)T. Abdomen with the venter black 38 Abdomen with the venter pale 42 38. Legs pale except tips of posterior tibije and their tarsi 39 Legs entirely pale; clypeus broadly emarginate, almost trun- cate; frontal crest very large, strongly angled anteriorly; ocellar basin with lateral walls tapering rapidly posteriorly; median fovea narrow, breaking slightly through the frontal crest; third antennal segment slightly shorter than fourth or fifth; procidentia short, not very broad, rounded at apex; body black, with clypeus, mouth-parts, extending to eyes, narrow line on venter of abdomen including hypo- pjfgium, and legs, ferruginous yellow; coxae black at base. Length 5.5 mm dubia 39. Clypeus distinctly emarginate ; procidentia minute 40 Clypeus nearly truncate; procidentia long and projecting, keeled ; body colored as in female, except that the abdomen is wholly black, and the legs yellowish except tip of posterior femora and apical half of posterior tibife. Length 5.5 mm. dyari No. 22.] HYMENOPTERA OF CONNECTICUT. I33 40. Stigma rather elongate and acuminate; extreme tips of hind tibiae brown 41 Stigma short and robust; apical half of hind tibi^ infuscated; clypeus shallowly but distinctly emarginate; ridges around ocellar basin rounded but distinct; procidentia narrow, short, and blunt; body black, with clypeus, labrum, palpi, tegulse, and legs except coxae and posterior tibiae and tarsi, yellowish ferruginous. Length 5.5 mm lombardae 41. Abdomen with venter black; hind wings with free part of R4 and transverse part of AI2 interstitial; procidentia short, narrow, slightly constricted basally, truncate at apex; other characters as in female. Length 6 mm harringftoni Abdomen with venter pale; hind wings with free part of Ri and the transverse part of M2 not interstitial; procidentia short, narrow, truncate at apex; other characters as in female except that dorsum of abdomen is entirely black and venter infuscated. Length 6 mm fylesi 42. Abdomen entirely black on dorsum; upper half of pleura pale; procidentia apparently nearly wanting; other characters as in female. Length 4.5 mm thoracica Abdomen with a transverse reddish band on segments two and three of dorsum and venter; procidentia as long as broad, narrow, tapering, squarely truncate, or slightly emarginate at apex, constricted at base; other characters as in female, except that inner orbits are black, legs dark reddish yellow, bases of all dorsal abdominal segments dark, especially the terminal ones, and hind tibiae slightly infuscated. Length 7 mm ventralis 43. Stigma and costa brown 44 Stigma and costa yellowish hyaline 45 44. Head nearly spherical in outline when viewed laterally; clyp- eus narrowly and deeply excavated; procidentia short, nar- row, rounded at apex. Length 5 mm odorata Head triangular in outline when viewed laterally; clypeus rather broadly excavated; procidentia short, narrow, pro- jecting about its own width. Length 5 mm cornelli 45. Procidentia narrow, nearly twice as long as wide, slightly notched at tip; other structural characters as in female. Length 4 mm vertebrata Procidentia narrow, projecting, squarely truncate at apex, about as wide as long; other structural characters as in female. Length 4.5-5 mm mendica °P. lata (Marlatt). Pteronns latus Marlatt. P, limbata (Cresson). Nematiis limbatus Cresson. 134 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. Pteronus limbatus Cresson. Larva feeds on willow. Fairfield, 1 August, 1904 (B. H. W.). °P. latifasciata (Cresson). Nematus latifasciatus Cresson. Pteronus latifasciatus Cresson, Larva feeds on birch. P. ventralis (Say). Nematus ventralis Say. Pteronus ventralis Say. Howard, Insect Book, PI. xii, Fig. 9. Larva feeds on willow and poplar. PI. i, Fig. 3. Farmington (E. N.) ; New Haven. °P. marlattii (Dyar). Nematus marlattii Dyar. Pteronus viarlattii Dyar. Larva feeds on alder. "P. harringtoni (Marlatt). Pteronus harringtoni Marlatt. •"P. fylesi (Marlatt). Pteronus fylesi Marlatt. ■^P. tricolor (Marlatt). Pteronus tricolor Marlatt. ^P. rufocincta (Harrington). Nematus rufociiictus Harring- ton. Pteronus rufocinctus Harrington. °P. dyari (Marlatt). Pteronus dyari Marlatt. Larva feeds on alder. °P. erythrogastra (Norton). Nematus erythrogaster Norton. P. corylus (Cresson). Nematus corylus Cresson. Pteronus cQvylus Cresson. Pteronus erythrogaster Norton. Howard. Insect Book, PI. xiv, Fig. 32. Larva feeds on Corylus. "P. fulvicrus (Provancher). Nematus fulvicrus Provancher. Pteronus fulvicrus Provancher. Nematus salicis Ashmead. Larva feeds on willow. P. populi (Marlatt). Pteronus populi Marlatt. Larva feeds on poplar. New Haven, 20 July, 1911 (A. B. C). °P. hudsonii (Dyar). Nematus hudsonii magnus Dyar, Pteronus hudsonii Dyar. Larva feeds on poplar. °P. antennata Marlatt. Pteronus antennatus Marlatt, P, ribesi (Scopoli). Nematus ribesi Scopoli, Pteronus ribesi Scopoli, Nematus ventricosus of many authors. Imported or Common Currant Worm. Common throughout the state on wild and cultivated currants and gooseberries. New Flaven (A. E. V., W. E. B., H. L. V., B. H. W.), °P. carpini (Marlatt). Pteronus carpini Marlatt. Larva feeds on ironwood. No. 22.] HYMENOPTERA OF CONNECTICUT. 135 Fig. 3. Pteronidea ribesi. Eggs. Twice natural size. Fig. 5. Pteronidea ribesi. Y\i 4 Pfi tonidiii nbesi. Partially grown Fully grown larva. Natura larvse. Twice natural size. size. 1 Fig. 6. Pteronidea ribesi. Cocoons. Natural size. Fig. 7. Pteronidea ribesi. Adult female. About twice natural size. "P. militaris (Cresson). Nematus militaris Cresson. Pteronns militaris Cresson. p. thoracica (Harrington). A'eviotus thoracicus Harrington. Pteronus thoracicus Harrington. Larva feeds on shad-bush. Hamden, 28 May, 191 1 (B. H. W.). 136 CONNECTICUT GEOL. AND NAT, HIST. SURVEY. [Bull. °P. ostryae (Marlatt). Pteronus ostrya Marlatt. °P. odorata (Dyar). Nematus salicis odoratus Dyar. Pteronus odoratus Dyar. Larva feeds on willow. °P, cornelli (Marlatt). Pteronus cornelli Marlatt. P. trilineata (Norton). Nematus trilineatus Norton. Pteronus trilineatus Norton. Nematus similaris Norton. Nematus robinice Forbes. Howard, Insect Book, PI. xiv. Fig. 28. Larva feeds on locust. Farmington (E. N.) ; New Haven, 22 May, 1908 (B. H. W.). ° P. magna (Marlatt). Pteronus magnus Marlatt. °P. quercus (Marlatt). Pteronus guerciis Marlatt. Larva feeds on white oak. °P. hyalina (Marlatt). Pteronus hyalinus Marlatt. Larva feeds on white birch. °P. vertebrata (Say). Nematus vertebratus Say. Pteronus vertebratus Say. Nematus dorsivittatus Cresson. Larva feeds on willow and poplar. P. Integra (Say). Nematus integer Say. Pteronus integer Say. Larva feeds on black oak. Connecticut (E. N.) ; New Haven. °P. monochroma (Norton). Nematus monochromus Norton. °P. stigmata (Norton). Nematus stigmatus Norton. P. mendica (Walsh). Nematus mendicus Walsh. Pteronus mendicus Walsh. Nematus trivittatus Norton. Larva feeds on willow. New Haven, 4 May, 1904, 19 April, 1910 (H. L. V., VanDuzee, B. H. W.) ; Wallingford, 14 June, 1911 (J. K. Lewis). °P. pinguidorsum (Dyar). Nematus pinguidorsum Dyar. Pteronus pinguidorsum Dyar, Larva feeds on birch. °P. longicornis (Marlatt). Pteronus longicornis Marlatt. °P. dubia (Marlatt). Pteronus dubius Marlatt. ''P. lombardae (Marlatt). Pteronus lombardce Marlatt. Larva feeds on Lombardy poplar. No. 22.] HYMENOPTERA OF CONNECTICUT. I37 Pontania Costa. Key to Species. 1. Head, including orbits, black 2 Head with orbits resinous or ferruginous 5 2. Thorax with collar and tegulse black; body black, with tro- chanters, apical half of femora, tibiae, and tarsi, pallid; clypeus nearly truncate; antennse with third segment dis- tinctly shorter than fourth; saw-guides slender, tapering, rounded at tip. Length 4 mm atra Thorax with tegulae and collar narrowly pale 3 3. Clypeus very slightly concave, almost truncate; body black, with tip of the clypeus, labrum, mouth-parts, extreme angles of pronotum, tegulae, and legs except bases of coxae, yellow; antennae with third and fourth segments subequal; saw- guides elongate, narrow, tapering regularly to tip. Length 4 mm hyalina Clypeus emarginate 4 4. Head smooth, not coarsely punctate; body black, with apex of clypeus, other mouth-parts, angles of pronotum, tegulse, and legs for the most part, yellow; antennae with third segment slightly longer than fourth; saw-guides narrow, regularly tapering or slightly emarginate on lower edge. Length 4 mm terminalis Head roughened and coarsely punctate; body black, with clypeus, mouth-parts, angles of pronotum, tegulae, hypo- pygium, and legs except bases of coxae, yellowish ferruginous ; antennae with segments three and four subequal ; hypopygium narrow, rounded at tip. Length 4 mm rugulosa 5. Head with the frontal crest obsolete 6 Head with the frontal crest present 7 6. Claws coarsely notched; body resinous yellow, with antennae above, quadrate spot on vertex, quadrate spot on meso- notum, line down center and tip of scutellum, and dorsum of abdomen except the lateral margin, brownish black; antennae with the third segment a little shorter than the fourth ; saw-guides short, broad, rounded at tip, emarginate be- neath. Length 4.5 mm robusta Claws very minutely cleft at extreme tip; body yellowish ferruginous, with antennae, a large spot on head about the ocelli, occiput, mesonotum and metanotum, abdomen except nar- row lateral margin, more or less of metaepisternum, and bases of posterior coxae, black; procidentia not or scarcely projecting. Length 4.5 mm placenta 7. Head with frontal crest unbroken, not even slightly notched 8 Head with frontal crest broken or notched 12 138 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [BulL 8. Body in great part black with pale markings 9 Body in great part resinous with black markings 11 9. Antennae with third segment longer than fourth; clypeus deeply emarginate, lobes somewhat pointed; ocellar basin sharply defined; saw-guides elongate, narrow, regularly tapering; body black, with apical half of clypeus, mouth- parts, angles of pronotum broadly, tegulae, and legs for the most part, light yellow; venter of abdomen yellowish, strongly infuscated. Length 5 mm populi 10. Surface of body shining, entirely without pubescence; ocellar basin distinctly defined, with rounded walls; frontal crest rather sharp and unbroken; median fovea oval and dis- tinctly defined; saw-guides moderately broad, regularly round at tip; body black, with orbits and face brownish yellow; pronotum, tegulae, legs for most part, and venter of abdo- men, yellowish or resinous; apical half of abdomen of female above, yellow; procidentia not longer than wide. Length 4.5 mm censors Surface of the body clothed with minute yellowish hairs, I especially evident on thorax; ridges of ocellar basin al- most obsolete; frontal crest well developed; median fovea minute, oval; saw-guides narrow, elongate, regularly tapering or slightly excavated beneath, clothed with short black hairs; body black, with the inner orbits narrowly, and the cheeks, resinous, strongly infuscated; supraclypeal area, mouth-parts, pronotum, tegulae, legs in great part, and central area of venter of abdomen, resinous infuscated. Length 4 mm borealis 11. Stigma broad, rounded on lower margin; body resinous, with base of antennae, space about ocelli, stripe on each lobe of mesonotum, apex of scutellum, metanotum, dorsal seg- metrts of abdomen except the last, extending over sides, large spot on pectus, and saw-guides, brownish black-, clypeus broadly and shallowly emarginate ; ocellar basin sharply and distinctly defined ; antennas with third segment a little shorter than fourth; saw-guides stout and broad basally, slightly emarginate on lower apical edge, tip obtusely rounded. Length 5 mm pectoralis Stigma narrow, acuminate; body resinous, with antenna, spot on head back of ocelli extending over occiput, center of lobes of mesonotum, apical half of scutellum, meta- thorax, basal plates, more or less of abdomen basally and centrally to apex, and saw-guides, black ; clypeus shallowly, somewhat angularly notched; ocellar basin with its walls low; antennae with segments three and four subequal; saw-guides broad, slightly concave on upper margin, and No. 22.] HYMENOPTERA OF CONNECTICUT. 139 decidedly produced at tip, which is obtusely pointed, with a rather dense tuft of hairs. Length 5.5 mm acuminata 12. Dorsum of thorax and abdomen in great part black 13 Dorsum of thorax and abdomen in great part ferruginous.. 16 13. Pale color of inner orbits interrupted; body black, with face below antennas, posterior and upper orbits, most of pronotum, tegulae, legs except extreme bases of posterior coxas and extreme bases of posterior tibiae, whitish or resinous; clypeus circularly emarginate; ocellar basin dis- tinctly defined; saw-guides broad, strongly acuminate at tip. Length 4 mm nigrita Pale color of inner orbits not interrupted 14 14. Antennas entirely black; body black, with orbits, face be- neath antennse, pronotum, tegulae, legs, and venter of abdomen, reddish yellow; head much narrower than thorax; clypeus distinctly circularly emarginate; ocellar basin with ridges rounded and subobsolete; saw-guides elongate, nar- row, and tapering. Length 4 mm gracilis Antenna;, at least in part, pale beneath 15 15. Vertex roughened; body in female black, with the face below the antennae, orbits, mouth-parts, angles of pronotum, tegulae, and legs except extreme bases of coxte, ferruginous ; clypeus circu- lar and moderately broadly notched with small lobes ; ocellar basin distinctly defined; frontal crest strongly developed and very slightly broken by median fovea; saw-guides rather broad, acuminate, not very sharply pointed, hairs rather long and abundant; male differs mainly in having a greater extent of ferruginous. Length 5 mm pallicomis Vertex not roughened; body in female black, with orbits, face below including frontal crest, most of pronotum, tegulas, legs, extreme bases of posterior coxae, more or less of central portion of venter of abdomen, including terminal seg- ments, and terminal dorsal segments with the cerci, ferru- ginous; clypeus rather deeply and angularly notched, lobes triangular; ocellar basin distinctly limited, lateral ridges not very sharply raised; frontal crest prominent, slightly notched at center; saw-guides broad, very slightly emar- ginate beneath, rounded above, apex rounded; male dif- fers in having antennae beneath and frontal crest fulvous. Length 4 mm pisum 16. Head with ridges about ocellar basin rounded, subobsolete; clypeus rather deeply but angularly emarginate, lobes tri- angular, rounded; frontal crest broad, rounded, slightly notched ; body in female ferruginous, with antennae except beneath, quadrate spot including ocelli, stripe on center of meso- notum sometimes wanting, spot on either side of scutellum, metathorax in part, basal plates, narrow basal margin of dorsal 140 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. segments indistinct toward tip, and saw-guides, black; saw- guides broad and robust, scarcely tapering, rounded at tip; male differs in having more of black on head, thorax for the most part, and dorsum of abdomen, black. Length 4-5.5 mm pomiun Head in female with ridges about ocellar basin well defined and thick; clypeus deeply and narrowly emarginate, lobes rounded; head and thorax strongly punctate; frontal crest large, slightly notched; body ferruginous, with antennae, large spot including ocelli, stripe on anterior lobe of mesonotum, stripe in front of scutellum, most of metanotum, and dor- sum of abdomen except at sides and at apex, brownish black. Male differs in having ocellar basin less distinctly defined. Length 4-5 mm desmodioides °P. atra Marlatt. P. hyalina (Norton). Messa hyalina Norton. Larva makes galls on Salix fragilis. New Haven, 19 April, 1910 (B. H. W.). P. terminalis Marlatt. Larva makes galls on smooth-leaved willow^. °P. rugulosa Marlatt. °P. robusta Marlatt. Larva folds the leaves of Popiilus tremidoides. °P. placenta Norton. Nematus placenta Norton. °P. populi ]\Iarlatt. Larva folds the leaves of Populus grandidcntata. °P. censors ^farlatt. Larva makes galls on Salix sericea. °P. borealis Marlatt. Larva makes galls on Salix sericea. °P. pectoralis Marlatt. °P. acuminata Marlatt. °P. nigrita Marlatt. °P. gracilis Marlatt. Larva makes galls on Salix petiolata. °P. pallicornis (Norton). Nematus pallicornis Norton. Larva feeds on willow. P. pisum (Walsh). Nematus pisum Walsh. Larva makes galls on Salix discolor. New Haven, 20 May, 1911 (A. B. C). °P. pomum (Walsh). Nematus pomum Walsh. Nematus hospes Walsh. Larva makes galls on Salix cordata and dis- color. No. 22.] HYMENOPTERA OF CONNECTICUT. I4I P. desmodioides Walsh. Nematiis desmodioides Walsh. Larva makes galls on Salix humilis. New Canaan, 17 Septem- ber, 1915 (B. H. W.). Euura Newman. Key to Species. 1. Frontal crest distinct 2 Frontal crest indefinite and apparently wanting; body black, with the head except a quadrangular spot about the ocelli and extending to the eyes, prothorax, margins of lobes of meso- notum narrowly, upper half of pleurae, tegulse, legs, abdo- men except above at base, and saw-guides except at apex, resinous; median fovea a minute elongate pit; saw-guides large, upper and lower margins slightly converging, and broadly rounded at apex. Length 7 mm tnaculata 2. Frontal crest unbroken at middle 3 Frontal crest notched or broken at middle 5 3. Orbits rufous 4 Orbits wholly black; body black, with antenna:, except at base, rufous; tegulae and legs beyond basal third of femora, yellowish rufous; median fovea distinct, round, pit-like; clypeus deeply, narrowly, angularly emarginate; saw- guides narrow and converging on both margins to a bluntly rounded apex. Length 6 mm salicicola 4. Median fovea circular, shallow; body black, with head ex- cept a round patch about ocelli, prothorax, legs, venter, and apex of abdomen more or less, rufous; clypeus shal- lowly, roundly emarginate; saw-guides straight above, and broadly convexly rounded to a blunt point at apex above. Length 7 mm. orbitalis Median fovea deep, pit-like, longer than broad ; body in female black, with head except a square spot about ocelli and occiput, prothorax, tegulas, legs, and abdomen except some of the basal dorsal abdominar segments, rufous; clypeus broadly, deeply rounded ; saw-guides with two margins converging toward apex, the lower margin strongly oblique, bluntly pointed at apex; apex of saw-guides covered with a dense scopa; male differs in having more black on head and abdomen. Length 7 mm ovum 5. Orbits, at least in part, pale 6 Orbits wholly black; body black, with legs beyond middle of femora, rufous; median fovea shallow, broad, indefinite; frontal crest broken by a very narrow furrow; saw-guides with the two margins gradually converging to a bluntly rounded point at apex. Length 6 mm nigra 6. Median fovea indefinite, represented only by a shallow de- pression in frontal crest; body black, with head except 142 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. a spot around ocelli and occiput, pronotum, tegulae, legs, and venter of abdomen, luteous; saw-guides straight above and broadly convexly truncated from the base to a point above at apex. Length 4 mm minuta Median fovea distinct, circular in outline, deep, and longer than broad ; body in female black, with head except a spot around ocelli and occiput, prothorax, tegulse, legs beyond mid- dle of coxae, and abdomen except more or less at base, rufous; clypeus broadly, shallowly, roundly emarginate ; saw-guides straight on upper margins, convex on lower, and obliquely convexly truncated at apex ; male differs in having body almost entirely black. Length 6 mm nodus °E. maculata MacGillivray. E. salicicola Smith. Larva makes galls on stems of Salix alba. New Haven, 19 April, 1910 (B. H. W;)- *E. orbitalis Norton. Larva makes galls on stems of SalLv humilis. Connecticut (E. N.) ; New Haven, i, 8 June, 191 1 (A. B. C). °E. ovum Walsh. Larva makes galls on stems of Salix cor data. °E. nigra Provancher. Larva makes a witch's broom on Salix. °E. minuta MacGillivray. °E. nodus Walsh. Larva makes galls on stems of Salix longifolia. Blennocampin.e. Key to Genera. 1. Gense broad and distinct, the eyes being distant from the base of the mandibles 2 Gense narrow and indistinct, hardly more than a line beneath the eyes 9 2. Claws simple, without a tooth 3 Claws always with a tooth, the tooth sometimes small 4 3. Antennse with third segment always distinctly longer than fourth Pareophora p. 143 Antennje with third segment subequal in length to fourth Neopareophora p. 144 4. Claws with a small tooth \vithin before the apex 5 Claws cleft at apex, inner tooth nearly as long as outer.. 7 5. IMesothoracic episternum with a transverse suture near its cephalic margin separating off a presternum Neotomostethus p. 144 No. 22.] HYMENOPTERA OF CONNECTICUT. I43 Mesothoracic episternum without a transverse suture near its cephalic margin 6 6. Antennae with third segment distinctly longer than fourth Ardis Antennffi with third segment subequal to or shorter than fourth Rhadinoceraea p. 144 ■ 7. Antennae with third segment subequal in length to fourth Hypargyricus p. 144 Antennae with third segment always distinctly longer than fourth 8 8. Hind wings of female with first anal cell never constricted or petiolated at apex Isodyctium p. 145 Hind wings of female with first anal cell always distinctly constricted and petiolated at apex Periclista p. 146 9. Mesothoracic episternum with a transverse suture near its cephalic margin, separating off a presternum Tomostethus p. 148 Mesothoracic episternum not with a transverse suture near its cephalic margin 10 ID. Claws simple, without a tooth Monophadnus p. 148 Claws always with a tooth, the tooth sometimes small 11 11. Claws with one or more teeth within before the apex 12 Claws cleft at apex 13 12. Claws with an erect tooth at middle Paracharactus p. 150 Claws with two erect teeth at middle Neocharactus 13. Hind wings with transverse part of Mz present 14 Hind wings with transverse part of Ma wanting 16 14. Antennae with third segment subequal to or shorter than fourth Phymatocera p. 150 Antennae with third segment always longer than fourth 15 15. Front wings with radial cross-vein and free part of Ri in- clined at the same angle Monophadnoides p. 151 Front wings with radial cross-vein and free part of R4 in- clined at different angles Aphanisus p. 153 16. Front wings with , radial cross-vein and free part of Ri in- clined at same angle Blennocampa p. 154 Front wings with radial cross-vein and free part of R4 in- clined at different angles Erythraspides p. 155 Pareophora Koiiow. ''P. floridana (Cresson). Selandria Horidana Cresson. Blennocampa -floridana Cresson. Body shining black, with the mandibles rufous at base, the tegulce and collar white, and the legs beyond the cox?e luteous. more or less suffused with fuscous ; wings infuscated, veins and stigma black. Length 5 mm. 144 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [BulL Neopareophora MacGillivray. Key to Species. 1. Pleurae rufous; body black, with labrum, mandibles, pro- thorax, tegulas, mesopleurae, side lobes of mesonotum, legs, venter and tip of abdomen, yellow or rufous; cerci elongate; saw-guides obliquely truncated at apex; wings hyaline. Length 4 mm martini Pleurse black 2 2. Antennal furrows broad and distinct, interrupted on the middle of the front by a fine, transverse ridge; body black, with labrum, tegulse, front legs below coxse, middle and hind legs below knees, and wings more or less at base, white; cerci hardly exserted; sav/-guides large, straight above, broadly convexly rounded to a blunt point at apex. Length 6 mm nigra Antennal furrows broad and distinct, not interrupted at mid- dle by a fine transverse furrow; body black, with labrum, mandibles for the most part, front legs, more or less infus- cated at base and apex, and middle legs beyond apices of femora, rufous; cerci hardly projecting; saw-guides large and obliquely rounded to a point at apex; wings infus- cated. Length 7 mm scelesta °N. martini AlacGillivray. °N. nigra (Harrington). Phymatocera nigra Harrington. °N. scelesta MacGillivray. Neotomostethus MacGillivray. °N. hyalinus MacGillivray. Body black, with the tegulse and the legs below the knees, except the apices of the posterior tibiae and tarsi, white; median fovea broad and rounded ; antennal furrow wanting on the front ; wings hyaline. Length 6 mm. Rhadinoceraea Konow. °R. similata MacGillivray. Body black ; wings strongly infuscated ; the postocellar area elevated ; ocellar basin distinct ; saw-guides roimded at apex to a blunt point above. Length 8 mm. Hypargyricus AlacGillivray. °H. infuscatus MacGillivray. Postocellar area strongly elevated ; saw-guides straight on upper and lower margins and rounded to a blunt point at middle No. 22.] HYMENOPTERA OF CONNECTICUT. I43 of apex; body black; front femora and tibia more or less white in front, suffused with black; wings infuscated. Length 8 mm. *H. fumipennis (Norton). Selandria (Phymatocera) fumi- pennis Norton. Howard, Insect Book, PI. xiv, Fig. 13. Postocellar area hardly elevated above the posterior orbits; saw-guides straight above and convex below, rounded to a blunt point at apex above ; body black ; front femora and tibise more or less white in front, suffused with black ; wings infus- cated. Length 8 mm. Larva feeds on Smilacina racemosa. Farmington (E. N.) ; Hamden, 24 July, 1910 (B. H. W.). Isodyctium Ashmead Key to Species. 1. Head wholly or in part pale 2 Head wholly black 3 2. Body wholly yellow or rufous, with eyes and antennas be- yond first segment, black ; wings, including veins and stigma, yellowish hyaline; postocellar area completely cir- cumscribed; saw-guides concave above and below, pro- longed into a narrow truncated projection above at apex. Length 6-7 mm dilutum Body black, with orbits connected across postocellar area, antennal fovese, first segment of antennae in part, supra- clypeal area in part, clypeus, spot on mandibles, most of prothorax, tegute, median lobe of mesonotum with its lateral margins, a spot on scutellum, pleurae in part, legs, and abdomen in great part, pale luteous; wings hyaline. Length 6 mm rileyi 3. Ocellar basin subobsolete; body black, with clypeus, labrum, mandibles, tegulse, prothorax, legs, and abdomen beyond basal plates, except a broad fuscous band through the middle of the dorsum, luteous ; pleurae, broad bands on lobes of meso- notum, and scutellum, rufous; saw-guides concave above, convex below, and prolonged above into a marked spine- like projection at apex; wings hyaline. Length 7 mm. . .caryicola Ocellar basin small, but distinct 4 4. Clypeus scarcely emarginate; body black, with a spot on supraclypeal area, clypeus, broad bands on lobes of meso- notum, pleurae, legs, and abdomen, except blackish bands of varying extent on each of the segments, rufous; wings hyaline. Length 6.5 mm infrequens Clypeus distinctly, angularly emarginate 5 5. Pleuras in great part black; body black, with clypeus, labrum, spot on mandibles, collar narrowly, tegulae, a narrow line 10 146 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. on posterior margin of mesopleurae, a line on the posterior margin of the abdominal segments, broadest on the venter, and the legs, brownish white; a band on posterior margin of each lobe of mesonotum, the scutellum, and the median tergal ab- dominal segments more or less, rufous; saw-guides con- cave above, and convex below, broadly rounded at apex to a point above ; wings hyaline. Length 6 mm atratum Pleurae rufous; body black, with clypeus, labrum, mandibles in great part, collar broadly, tegulae, legs, and abdomen beyond basal plates in great part, luteous, sometimes suf- fused with rufous; lobes of mesonotum except a black spot on center of each, scutellum, and pleurae, rufous; saw-guides slightly concave above, and convexly rounded from the base to a point at apex above ; wings hyaline. Length 6 mm murtfeldtiae °I. dilutum (Cresson). Monophadnus dilutus Cresson. Larva feeds on Quercus alba and Quercus prinus. °I. rileyi (Cresson). Selandria rileyi Cresson. Monophadnus rileyi Cresson. °I. caryicola Dyar. Larva feeds on pig-nut hickory. °I. infrequens Dyar. Larva feeds on Quercus alba. I. atratum MacGillivray. Southington, 27 April, 1911 (W. E. B.). °I. murtfeldtiae Dyar. Larva feeds on black oak. Periclista Konow. Key to Species. 1. Pleurae more or less rufous 2 Pleurae wholly black 4 2. Fourth segment of antennae distinctly longer than fifth; front finely punctate 3 Fourth segment of antennae equal to fifth; front finely stri- ated; saw-guides with their upper margins straight, their lower margins convex at base, concave and constricted into a blunt point at apex; body black, with clypeus, labrum, collar broadly, tegulae, legs, metapleurae, venter of abdo- men, and greater part of tergum except a band at center, luteous or white; pleurae, a broad band on apex of each lobe of mesonotum, and scutellum, rufous; wings hyaline. Length 7 mm purpuridorsum 3. Ocellar basin uniformly concave; ocellar furrow distinct; body black, with clypeus, labrum, collar broadly, tegulae. No. 22.] HYMENOPTERA OF CONNECTICUT. I47 legs, upper half of pleurae, mesonotum except black spot at middle, metanotum, scutellurn, and abdomen, fulvous; mesonotum and mesopleurse tending to rufous; wings hya- line. Length 7 mm marginicollis Ocellar basin flat and distinct; ocellar furrow wanting; saw- guides with their upper margins slightly concave above, and with the lower margins convex, and drawn out to a sharp point above at apex; body black, with clypeus, labrum, collar broadly, tegulae, legs beyond coxse, and abdomen at sides above and for the most part beneath, luteous shading to brownish; median lobe of mesonotum for the most part, and pleurae, brown ; wings hyaline. Length 5 mm confusa 4. Clypeus, if emarginate, not angularly emarginate S Clypeus angularly emarginate; body black, with labrum, col- lar narrowly, tegulae, legs, and tergum of abdomen for the most part, white, more or less suffused with rufous and fuscous ; wings hyaline. Length 7 mm emarginata 5. Legs with femora more or less black 6 Legs wholly pale beyond coxae; body black, with collar narrowly, tegulae, and legs beyond knees, luteous; femora rufous; ocellar basin distinct; postocellar area twice as broad as long; wings hyaline. Length 6 mm media 6. Interocellar furrow not extending onto postocellar area ; body black, with collar narrowly, and tegulae, white ; knees and tibiae luteous ; tarsi fuscous ; wings hyaline. Length 5.5 mm chionanthi Interocellar furrow extending onto postocellar area; body black, with collar narrowly, and tegulae, white ; legs beyond middle of femora, brown ; tarsi more or less dusky ; wings hyaline. Length 5.5 mm subtruncata °P. purpuridorsum Dyar. Howard, Insect Book, PI. xiv, Fig. 10. Larva feeds on Quercus alba. °P. marginicollis (Norton). Selandria marginicollis Norton, Monophadnus marginicollis Norton. °P. confusa MacGillivray. Larva feeds on Quercus obtusi- loba. °P. emarginata MacGillivray. Mogerus emarginatus MacGil- livray. Larva feeds on Quercus coccinea. ° P. media (Norton). Selandria media '!>lorton. Monophadnus media Norton. Larva feeds on Quercus alba. °P. chionanthi Dyar. Larva feeds on Chionanthus. °P. subtruncata Dyar. Larva feeds on Quercus coccinea. 148 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. Tomostethus Konow. Key to Species. 1. Mesonotum and pleurae rufous 2 Mesonotum and pleurae black; body black, with labruni, a fine line on collar, tegulae, front legs below middle of fem- ora, and middle and hind legs beyond knees, white; saw- guides concave above, and broadly convex below, obliquely truncately rounded to a point at apex above; wings hya- line. Length 6 mm nortoni 2. Front with large tranverse lateral foveae; body in female black, with prothorax, mesonotum, mesopleurae, scutellum, and meta- notum, rufous; wings infuscated; saw-guides broadly obliquely rounded at apex; male sometimes has the entire mesonotum black. Length 5-8 mm bardus Front not with large transverse lateral fovae; body black, with prothorax, upper half of mesopleurae, lobes of meso- notum, front legs below knees, and knees of middle and hind pair, luteous or rufous; head with a depressed, rough- ened, shield-shaped area below and including the median ocellus; wings hyaline; saw-guides obliquely pointed to apex above. Length 7 mm inhabilis °T. nortonii MacGillivray. T. bardus (Say). Allantus hardus Say. Selandria barda Say. Monophadnus hardus Say. PI. i, Fig. 4. Howard, Insect Book, PI. xii, Figs. 13 and 15. Larva feeds on ash. New Haven, 1904 (B. H. W.). T. inhabilis (Norton). Selandria inhabilis Harris. Blenno- campa inhabilis Norton. Larva feeds on pear. New Haven, 15 May, 1905, Milldale, 21 May, 1906, Yalesville, 26 May, 1908 (B. H. W.) ; Watertown, 26 May, 1911 (W. E. B.) ; Orange, 21 May, 191 1 (A. B. C). Monophadnus Hartig. Key to Species. 1. Antennal furrow interrupted on middle of front 2 Antennal furrow continuous and distinct from clypeus to occiput; body black, with labrum, tegulae, and legs below knees, white; scutellum coarsely punctate behind at sides; scutellar appendage flat and impunctate; ocellar basin dis- tinct. Length 7 mm distinctus 2. Front with deep, broad lateral foveae, not connected with antennal foveae; body black, with tegulae, corners of pro- No. 22.] HYMENOPTERA OF CONNECTICUT. I49 thorax somewhat, and legs below knees, white; scutellum with a few scattered coarse punctures behind; scutellar appendage flat and impunctate; median fovea continuous with ocellar basin. Length 5 mm minutus Front not with a large puncture on each side, sometimes with end of antennal furrow enlarged and punctiform 3 3. Mesonotum with median lobe more densely punctate than lateral lobes; body black, with tegulae and legs below knees white; saw-guides straight above and below, and obliquely rounded to a blunt point at apex above; apex of scutellum finely densely punctate; scutellar appendage flat and punctate. Length 6 mm tiliae Mesonotum with the median lobe, if punctate, uniformly punc- tate with the lateral lobes 4 4. Scutellar appendage flat and not carinate at middle 5 Scutellar appendage longitudinally carinate at middle 6 5. Area in front of median ocellus smooth; body black, with legs below trochanters more or less whitish, sometimes strongly infuscated; wings infuscated; head and thorax impunctate; saw-guides with sides straight and obliquely rounded at apex. Length 6 mm nubilipennis Area in front of median ocellus always more or less rough- ened; body black, with tegulae and legs below knees, white; wings slightly infuscated; scutellum coarsely punctate at sides behind; saw-guides obliquely rounded to a blunt point at apex. Length 6 mm bipunctatus 6. Scutellum and metathorax uniformly densely punctate; body black, with tegute, pronotum for the most part, front legs beyond bases of femora, and middle and hind legs beyond knees, white; front finely punctate; ocellar basin fairly distinct; saw-guides oblique at apex and pointed. Length 5.5 mm aequaUs Scutellum more densely punctate than metathorax 7 7. Head with V-shaped furrow behind the median ocellus distinct; body black, with tegulae, margin of pronotum more or less, and legs beyond knees, white; wings yellowish hyaline; saw-guides with two edges parallel and obliquely trun- cate at apex. Length 6.5 mm plicatus Head with V-shaped furrow behind the median ocellus indefinite, almost obliterated; body black, with labrum, tegute, pro- notum entirely, legs beyond knees, and a narrow margin at apex of each tergal and ventral segment, white; wings yellowish hyaline; saw-guides with two sides parallel, squarely truncated at apex, with lower corner rounded. Length 6 mm transversus 150 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. °M. distinctus MacGillivray. °M. minutus MacGillivray. *M. tiliae Norton. Selandria tilicc Norton. Larva feeds on linden. Farmington (E. N.). °M. nubilipennis Norton. Selandria nubilipennis Norton. M. bipunctatus MacGillivray. Stonington, 16 May, 1906 (B. H. W.). °M. sequalis MacGillivray. °M. plicatus MacGillivay. °M. transversus MacGillivray. Paracharactus MacGillivray. *P. rudis (Norton). Selandria rudis Norton. Phymatocera rudis Norton. Mesonotum wholly rufous; body black, with the labrum white, and the prothorax, mesonotum, and the metanotum in part, rufous ; front legs below the knees, and the knees of the middle pair, white, more or less infuscated; ocellar basin dis- tinct ; median fovea broader than long. Length 6 mm. Connecticut (E. N.). °P. obscuratus MacGillivray. Mesonotum black, except a small infuscated spot near the bases of the wings ; body black, with the tip of the clypeus, the labrum, the supraclypeal area, the angles of the prothorax, the posterior third of the mesopleurae, and the front and middle legs below the knees, yellow or rufous; ocellar basin indistinct. Length 5 mm. Phymatocera Dahlbom. P. rufula Norton. Selandria rufula Norton. Body black, with the clypeus, labrum, and mandibles, rufous, shading onto the front adjacent to the antennal sockets and the proximal segments of the antennae; tip of the anterior femora longer beneath, rufous shaded with fuscous ; head pol- ished; the antennal fovese wanting below the lateral ocelli, replaced by a sharp ridge extending to the antennal sockets ; the antennal sockets deeply and broadly notched above; the area between the ridges concave, polished around the median ocel- No. 22.] HYMENOPTERA OF CONNECTICUT. I5I lus, angularly interrupted between the antennal sockets; the supraclypeal area depressed; antennae with the third, fourth and fifth segments subequal; the saw-guides concave above, and broadly convexly rounded below and at apex to a point above. Length 5.5 mm. New Haven, 28 July, 191 1 (A. B. C.) ; Farmington (E. N.). Monophadnoides Ash mead. Key to Species. 1. Abdomen with dorsal surface rufous 2 Abdomen with dorsal surface black 4 2. Front with a depression around the median ocellus more or less distinct but not V-shaped; body black, with tegulae, cor- ners of pronotum, and legs beyond bases of femora, lute- ous; abdomen with greater part of tergal segments two to five rufous; front with lateral fovea; scutellum punctate at apex; saw-gu'ides broad, straight above, broadly convex below, oblique at apex. Length 5.5 mm rubi Front with a V-shaped furrow behind the median ocellus 3 .3. Front with a triradiate depression in front of the median ocellus ; antennae with third segment shorter than the fourth and fifth together; body black, with tegulae, pronotum, front legs beyond trochanters, and middle and hind legs beyond middle of femora, luteous; abdominal segments one to five, yellow- ish rufous; front with lateral fovea; saw-guides of moder- ate width, straight above and below, obliquely rounded to a point above at apex. Length 6.5 mm conspicuus Front with a deep, semicircular depression in front of the median ocellus; body black, with angles of pronotum, tegulae, and legs below knees, white; third segment of antennae shorter than fourth and fifth together; head smooth and polished ; saw-guides straight above and below, obliquely convexly rounded at apex. Length 6 mm concessus 4. Front with lateral foveae 5 Front not with lateral fovae; if indicated, the puncture broad and shallow 10 5. Scutellum wholly smooth 6 Scutellum punctate or striate at apex 8 •6. Antennae with second segment broader than long 7 Antennae with second segment longer than broad; body black, with collar narrowly, tegulae, and legs belov/ knees, white; pentagonal area wanting; saw-guides straight above, con- vex below, and obliquely, emarginately truncated at apex. Length 5 mm conspiculatus 152 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 7. Ocellar furrow narrow, deep, and distinct; body black, with angles of pronotum, tegulae, and legs below knees, white; pentagonal area flattened, walls flat and practically want- ing; third segment of antennae not as long as fourth and fifth together; saw-guides straight above, convex below, broadly obliquely rounded to a blunt point above at apex. Length 6 mm consobrinus Ocellar furrow broad, shallow, and indistinct; body black, with tegulse, and legs beyond knees, white, except that the tips of the tibiae and the tarsi are more or less infuscated; pentagonal area wholly wanting; third segment of antennae as long as fourth and fifth together; saw-guides convex above and below, obliquely truncated to a point above at apex. Length 5 mm cordatus 8. Scutellum punctate at apex; front without a V-shaped furrow behind median ocellus; body black, with collar narrowly, tegulae, and legs below knees, white; third segment of antennas subequal in length to fourth and fifth together; pentagonal area wanting; saw-guides straight above and below, obliquely rounded to a blunt point at apex above. Length 6 mm crassus Scutellum striate at apex 9 9. Front with a V-shaped furrow behind median ocellus; body black, with angles of pronotum, tegulae, trochanters, and legs beyond knees, white; third segment of antennae sub- equal in length to fourth and fifth together; pentagonal area wanting; saw-guides broad, straight above, strongly convexly rounded below to apex above. Length 5 mm conspersus Front without a V-shaped furrow behind anterior ocellus; body black, with angles of pronotum, tegulae, and legs below knees, white; third segment of antennae shorter than fourth and fifth together; pentagonal area wanting; saw- guides straight above and below, oblique at apex, drawn out into a long point above. Length 6 mm costatus 10. Scutellum smooth, or at most extremely finely rugose ; body black, with angles of pronotum narrowly, tegulae, and legs beyond knees, white ; antennae with third segment distinctly shorter than fourth and fifth together; pentagonal area and V-shaped furrow behind median ocellus wanting. Length 6 mm coracinus Scutellum distinctly punctate at sides; body black, with angles of pronotum broadly, tegulae, apices of coxs and trochan- ters more or less, and legs beyond knees, white; antennae with third segment shorter than fourth and fifth together; pentagonal area indistinctly impressed; V-shaped furrow behind median ocellus distinct; saw-guides broad, convex No. 22.] HYMENOPTERA OF CONNECTICUT. I53 above and below, broadly obliquely rounded to a blunt point at apex above. Length 6 mm collaria °M. conspicuus MacGillivray. *M. rubi (Harris). Selandria (Hoplocampa) rubi Harris Monophadnus rubi Harris. Raspberry Saw-fly. Larva feeds on Rubus. Connecticut (E. N.) ; Branford, 8 May, 1905 (H. W. W.). °M. concessus MacGillivray. °M. conspiculatus MacGillivray. M. consobrinus MacGillivray. New Haven, 28 April, 1905 (A. B. Recknagel), 30 May, 1910 (W. E. B.). °M. cordatus MacGillivray. ^M. crassus MacGillivray. °M. conspersus MacGillivray. "M. costatus MacGillivray. M. coracinus MacGillivray. New Haven, 22 June, 1907 (B. H. W.). M. collaris MacGillivray. Stonington, 13 June, 1907 (B. H. W.). Aphanisus MacGillivray. Key to Species. 1. Front with a distinct pentagonal area 2 Front with pentagonal area entirely wanting 3 2. Pentagonal area with its lateral walls sharp and distinct; front smooth and polished; body black, with pronotum, tegulae, legs, and a fine margin on apex of abdominal seg- ments, white or luteous; wings somewhat infuscated; scutellum impunctate at sides; front without lateral foveae; saw-guides broad, straight above, broadly convexly rounded from the base to a hooked point above. Length 5 mm lobatus Pentagonal area with its lateral walls low and indistinct; front finely rugose ; body black, with collar, teguljE, and legs below knees, white ; femora more or less pic.eous ; wings hyaline ; scutellum punctate at sides ; front without lateral foveae ; saw- guides straight above, convexly rounded below to a blunt point above. Length 5 mm muricatus 3. Front with a V-shaped furrow behind median ocellus; body black, with collar, tegulse, and legs below knees, white; 154 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [BuU. wings hyaline; scutellum punctate at sides; front with lateral fovese connected with antennal foveae; saw-guides straight above, convex below, and obliquely rounded to a point above. Length 5 mm odoratus Front without a V-shaped furrow behind median ocellus; body black, with collar, tegulae, and legs beyond middle of femora, white; wings hyaline; scutellum roughened at sides; front with lateral fovese not connected with antennal foveae; saw-guides straight above and convexly rounded from the base to a blunt point above. Length 6 mm nigritus °A. lobatus MacGillivray. °A. muricatus MacGillivray. A. odoratus MacGillivray. New Haven, 15 May, 1905 (B. H. W.). °A. nigritus MacGillivray.' Blennocampa Hartig. Key to Species. 1. Antennae with third segment shorter than fourth and fifth together 2 Antennae with third segment as long as or longer than fourth and fifth together 3 2. Antennae with third segment a little longer than fourth; wings fuliginous; body black, with trochanters, front legs in front, and knees and tarsi more or less, pale luteous; tegulae brown. Length 6 mm carbonaria Antennae with third segment one and one-half times as long as fourth; wings hyaline; body black, with legs beyond knees shading from piceous to luteous; tegulae in part, white; head and thorax finely pubescent. Length 6.5 mm. spiraeas 3. Front with a V-shaped furrow behind the median ocellus 4 Front without a V-shaped furrow; pentagonal area entirely wanting; body black, with tegulae and legs below knees, white; tibiae more or less infuscated; clypeus angularly emarginate. Length 5.5 mm abnorma 4. Scutellum punctate or striate, at least in part 6 Scutellum smooth, not punctate or striate 5 5. Median fovea with a rounded papilla at center; hind wings with the cell R1+2 rounded at apex, without a spur; body black, with tegulae and legs below knees luteous; front tibiae and tarsi more or less infuscated; saw-guides convex above and below and convexly truncated at apex. Length 6 mm. antennata No. 22.] HYMENOPTERA OF CONNECTICUT. 1 55 Median fovea flat, without a papilla at center, somewhat X- shaped; hind wings with cell Ri+j angulated at apex below, with a spur; body black, with tegulae and legs below knees, except apices of tibiae and greater part of tarsi, white; saw-guides strongly convex above and below and rounded to a point at apex. Length 6 mm aperta 6. Scutellum punctate at sides 7 Scutellum finely striate at sides; body black, with tegulse and legs below knees, except apices of tibiae and tarsi, white; median fovea an elongate furrow; saw-guides broad, straight above, convex below, obliquely truncated at apex. Length 6 mm angulata 7. Median fovea with a large rounded papilla at center; body black, with tegulae, and legs, except tips of middle and pos- terior tibiae and tarsi, white; hind wings with cell Ri+: angular below at apex, without a spur; saw-guides straight above, and convexly obliquely rounded from base to apex below. Length 6 mm adusta Median fovea fiat, without a papilla at center ; body black, with tegulae and legs below knees luteous ; hind wings with cell Ri+2 rounded at apex, without a spur; saw-guides broad, straight above and below, broadly convexly and somewhat obliquely rounded at apex. Length 6 mm acuminata °B. carbonaria (Cresson). Selandria carbonaria Cresson. °B. spiraeae Dyar. Larva feeds on Spircca salici folia. °B. abnorma MacGillivray. °B. antennata MacGillivray. °B. aperta MacGillivray. °B. angulata MacGillivray. °B. adusta MacGillivray. °B. acuminata MacGillivray. Erythraspides Ashmead. Key to Species. 1. Mesonotum rufous 2 Mesonotum shining black; body black, with apices of coxae, trochanters, and legs beyond knees, white; posterior tibiae infuscated; pentagonal area and V-shaped furrow wanting; front without lateral foveae; saw-guides straight above and below, broadly convexly rounded to a blunt apex; wings in female infuscated; male with wings clearer at apex. Length 55 mm Parvus 156 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull, 2. Lateral foveae broken by antenna! fovese; body black, with prothorax, mesothorax, and scutellum except at apex, rufous; clypeus and legs for the most part, white; coxje and tarsi somewhat infuscated; wings somewhat infus- cated. Length 6 mm caryae- Lateral foveas not broken by antennal foveae; body black, with tip of clypeus, front and middle legs beyond coxas, hind coxas, and hind femora beneath, white; pronotum, mesonotum, and tegulae, rufous; pentagonal area and V- shaped furrow wanting; front with a pit-like puncture on each side ; saw-guides retracted. Length 7 mm pygmaeus °E. parvus (Cresson). Blennocampa parva Cresson. Larva feeds on Fuchsia. *E. caryas (Norton). Monophadnus caryce Norton. Selandria caryco Norton. Larva feeds on hickory. Farmington (E. N.). E. pygmaeus (Say). Blennocampa pygmcca Say. Selandria vitis Harris. Larva feeds on Vitis. Connecticut (E. N.). Fenusin^. Key to Genera. 1. Hind wings with second anal vein wanting, so that the first anal cell is open; base of third anal vein in front wings represented by a dark band 3 Hind wings with second anal vein present, so that the first anal cell is closed; base of third anal vein in front wings entirely wanting 2 2. Front wings with the radio-medial cross-vein present Profenusa p. 156 Front wings with the radio-medial cross-vein wanting ..Messa p. 157 3. Radial cross-vein ending in cell R4 a considerable distance before free part of R4 Kaliofenusa p. 157 Radial cross-vein ending in cell Ra a considerable distance beyond free part of R4 Fenusa p. 157 Profenusa MacGillivray. P. collaris MacGillivray. Body in female black, with clypeus, labrum, malar space, mandibles, first segment of antennae, tegulae, a narrow margin to the pronotum, and legs for the most part, whitish ; protho- rax except parts named, cephalic part of mesopleurae, and pec- tus, rufous ; median fovea minute but distinct ; vertical furrows No. 22.] HYMENOPTERA OF CONNECTICUT. I57 not reaching the occiput; clypeus truncate; saw-guides with dorsal and ventral margins converging, the apex bluntly- pointed. Male differs in having rufous part of thorax inclined to whitish and extending over entire pleurae, venter of abdo- men, and a broad band on lateral part of dorsal aspect, broader behind, sometimes fused on meson, whitish. Length 3 to 4 mm. Larva mines leaves of Crategus and Prunus. Messa Leach. °M. ambigua (Norton). Fenusa ambigua Norton. Black, with the two basal segments of the antennas, the pro- thorax entirely, the tegulse, the legs entirely, the abdomen for the most part (sometimes infuscated at apex), white; antennae with the second segment elongate, the first and second together subequal to the third in length, the third longer than the fourth ; wings hyaline, hairy, the veins and stigma brown- ish ; saw-guides straight above, rounded below and at apex to a point above. Length 3.5 mm. Kaliofenusa ]\IacGillivray. °K. ulmi (Sundewall). Kaliosysphinga ulmi Sundewall. Black, except legs beyond the knees, which are brownish ; hypoclypeal area convex, abrupt in front ; clypeal furrow prom- inent, not interrupted by the clypeal area; front elevated, with a broad, shallow median fovea, as broad as the area between the antennae; antennal furrows extending from the tentorial invaginations almost to the occiput, deep and narrow as far as the anterior ocellus, separated from the occiput by a narrow wall ; wings almost hyaline, infuscated along the veins. Length 3.5 mm. Larva mines leaves of the European and American elms. Fenusa Leach. °F. dohrnii (Tischbein). Kaliosysphinga dohniii Tischbein. Black, except legs beyond the knees, which are fuscous ; head without a distinct furrow between the ocellar and posto- cellar areas ; antennal furrow not expanded into a large pit opposite the middle of the front, and with two distinct tooth- like indentations on the median side; saw-guides with the 158 CONNECTICUT GEOL. AND NAT, HIST SURVEY. [Bull. dorsal margin convex and obliquely rounded at apex, bluntly and roundly pointed aUove ; third segment of the antennae as long as the fourth and fifth together, the fourth and fifth sub- equal, the second broader than the fourth- Length 3 mm. Larva mines the leaves of the European alder. SCOLIONEURIN.E. Key to Genera. 1. Antennae with second segment annular, broader than long; first and second segments together shorter than third.... 2 Antennae with second segment distinctly longer than broad; first and second segments together as long as or longer than third Melanobates p. 158 2. Eyes with their inner margins straight and parallel, not con- verging below ; front distinctly wider than high Polybates p. 158 Eyes with their inner margins uniformly convex and con- verging below; front not as wide as high Metallus p. 159 Melanobates AlacGillivray. M. leucostomus Rohwer. Body black, with the clypeus, labrum, basal half of the mandi- bles, angles of the pronotum, and tegulse, white ; legs below the knees brownish white; front around the base of the antennae in- distinctly punctate ; median fovea large, circular, and not sharply defined ; antennal furrows punctiform above the ocelli ; third antennal segment longer than the fourth ; the stigma rounded on the radial margin, broadest at the middle. Length 3 mm. Polybates INIacGillivray. P. slossonae MacGillivray. Lateral foveae united with the antennal foveae; vertical fur- rows punctiform ; ocellar furrow distinct, broadly concave behind ; ocellar basin strongly convex, slightly depressed in front of the median ocellus ; median fovea deep, punctiform ; an- tennae slender, the first and second segments together less than half the length of the third ; wings hyaline, the veins, costa, and stigma brown ; stigma over twice as long as wide, its hind margin uniformly convexly rounded; saw-guides straight above and below, converging to a bluntly rounded point at apex ; body black, with all the legs entirely white. Length 3 mm. No. 22.] HYMENOPTERA OF CONNECTICUT. 159 P. secundus Rohwer. Lateral fovese distinctly separated from the antennal foveae; ocellar furrow straight; median fovea small, circular, and well defined; postocellar area broader at the occiput; antennas with the first segment slightly shorter than the second, the second and third equal ; saw-guides like those of the preceding species ; stig- ma about twice as long as its greatest width, broader and some- what angled at base; body black, with the abdomen piceous and all the legs pale yellow ; wings dusky, the veins dark brown. Length 3 mm. Metallus Forbes. Key to Species. 1. Stigma three times as long as broad; front not punctate around base of antennae; body shining black, with median and lateral lobes of mesonotum rufous; labrum, clypeus, mandibles, antennae, angles of pronotum, tegulae, anterior and middle legs below bases of coxae, and trochanters, tibiae, and tarsi of hind legs, orange white ; antennae with third seg- ment not as long as fourth and fifth together; saw-guides narrow, upper margins straight, apex rounded, curved from upper apex to lower base. Length 4 mm canadensis Stigma twice as long as broad; front not punctate around base of antennae 2 2. Front wings with free part of Mi+Cui joining cell M* dis- tinctly beyond the middle ; body reddish yellow, with legs pallid, and head, antennae beyond second segment, meso- pleurae, pectus, and apex of abdomen, piceous; head with an indistinct transverse carina between antennas ; third an- tennal segment longer than fourth and not as long as fourth and fifth together; saw-guides straight above, ob- liquely truncate, and rounded below. Length 3.5 mm capitalis Front wings with free part of M4+CU1 joining cell M* at middle 3 3. Mesonotum and scutellum rufous; body black, with the two basal segments of antennae, middle and lateral lobes of meso- notum, scutellum, its appendage, and postscutellum, rufous; legs with trochanters, knees, front and middle tibiae and tarsi, posterior tibiae (more or less infuscated towards apex), and posterior tarsi, yellowish white ; saw-guides straight above, convex below, obliquely truncated at apex, rounded at angle below, and sharply pointed at upper apical angle. Length 4.5 mm rohweri Mesonotum and scutellum black 4 l6o CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 4. Ocellar furrow distant from median ocellus, connected with it by a distinct interocellar furrow; depressed area around median ocellus small with precipitous walls, forming a well marked V; median fovea a broad, deep pit, subequal to lateral fovea; body polished, with sparse setigerous punctures, and black, with apices of coxae, trochanters, knees, tibiae, and tarsi, white; front femora sometimes only infus- cated at apex; saw-guides straight above, oblique at apex, convex below, and rounded to a point at apex above. Length 4 mm rubi Ocellar furrow adjacent to median ocellus, interocellar fur- row therefore wanting; depressed area behind median ocel- lus broad; median fovea a broad, deep pit, larger than lateral fovea; lateral fovea distinct from antennal fovea; body polished, with sparse sdtigerous punctures; saw- guides straight above, somewhat oblique below, broadly obliquely rounded to a point at apex above. Length 4 mm. bethunei ""M. canadensis Marlatt. °M. capitalis Norton. °M. rohweri MacGillivray. M. rubi Forbes. Larva a leaf miner in blackberry and dewberry. New Haven, 6 July, 1904 (H. L. V.). °M. bethunei MacGillivray- Larva a leaf miner in black- berry. Hylotomin.^. Key to Genera. Front wings with cell Ri+s not appendiculate at apex ; cells R and Rs coalesced Atomacera p. 160 Front wings with cell R1+2 not appendiculate at apex; cells R and Rb separate Hylotoma p. 161 Atomacera Say. Key to Species. 1. Body black and rufous 2 Body black; wings strongly infuscated; front legs white or piceous beyond knees; head and body polished. Length 4 mm. Without much doubt the male of the following species debilis 2. Body black, with pronotum, mesonotum, scutellum, and upper part of pleurae, rufous; wings strongly infuscated; legs paler beyond knees, front pair usually white; mesonotum sparingly punctate. Length 4 mm ruficollis No. 22.] HYMENOPTERA OF CONNECTICUT. l6l Body black, with abdomen rufous; clypeus, labrum, and palpi, whitish; wings strongly infuscated; legs whitish, ante- rior tibias darker. Length 6 mm cellularis A. debilis Say. Poquonock, 27 June, 1905 (H. L. V.). A. ruficoUis Norton. Poquonock, 27 June, 1905 (H. L. V,, B. H. W.). °A. cellularis Say. Larva feeds on sweet potato. Hylotoma Latreille. Key to Species. 1. Head, thorax, and abdomen wholly black or blue-black .... 2 Head, thorax, and abdomen not wholly black 4 2. Tibiae black; wings strongly infuscated, clearer at tip, a darker spot below stigma. Length 8 mm ccerulea Tibiae in great part white 3 3. Legs white below knees, except apices of middle and poste- rior tibice and apices of each of their tarsal segments; body entirely black, except parts named; wings strongly infuscated, paler at apex. Length 6 mm. (male) ....dulciaria Legs wholly pale below knees; body black or blue-black, with palpi and legs beyond knees white, tip of posterior tibiae and their tarsi sometimes somewhat infuscated; wings smoky or hyaline, with a dark spot below the stigma. Length 1 1 mm macleayi 4. Head wholly black 5 Head wholly or in great part pale 13 5. Thorax wholly black 6 Thorax wholly or in part pale 8 6. Legs black; abdomen beyond basal plates yellow or reddish yellow; palpi and front tibiae infuscated. Length 8 mm. abdominalis Legs wholly or in part pale 7 7. Antennae usually with apical segments yellow; abdomen usu- ally beyond the basal plates, and legs beyond the knees, yellow; wings and veins yellowish hyaline, with stigma and a spot below it infuscated; remainder of body shining black. Length 10 mm clavicomis Antennae with apical segment black; abdomen with basal plates and first six abdominal segments yellow; basal half of tibiae white, shading to fuscous at apex; wings varying from infuscated to yellowish hyaline; stigma and an angular spot beneath it infuscated; remain- der of body black. Length 10 mm virescens 11 l62 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 8. Abdomen black; body in female, except pronotum, meso- notum, scutellum usually, and mesopleurae frequently, glossy black; the wings strongly infuscated, especially towards the base; male differs usually in having the pro- thorax yellow and the legs beyond the knees white. Length 8-10 mm scapularis Abdomen wholly or in part pale 9 9. Mesonotum wholly or in part black 10 Mesonotum wholly pale i:^ 10. Mesonotum wholly black; body black, with scutellum usu- ally, mesopleurae, sometimes extending onto pronotum, and abdomen except at extreme apex, red or yellow-red; wings strongly infuscated, lighter toward apex. Length 12 mm humeralis Mesonotum rufous, with black markings 11 11. Mesonotum rufous, with a black spot on each lobe; body black, with mesonotum (except a black spot on each lobe), scutellum, mesopleurae, and abdomen, red; wings infus- cated. Length 10 mm miniata Mesonotum rufous, with a black spot on each lateral lobe; body black, with mesonotum (except a black spot on each lateral lobe), metanotum, scutellum, mesopleurae, pro- notum in part, hind coxae at middle, and abdomen, red; wings infuscated, clearer toward the tip. Length 12 mm. sphinx 12. Ocellar basin with low, broadly rounded walls, not broken above median fovea; body yellow or luteous, with head and its appendages, prothorax in great part, tegulae, legs, pectus, and saw-guides, black; wings smoky. Length 10 mm pectoralis Ocellar basin with comparatively high, sharp walls, distinctly broken above median fovea; body yellow, with head and its appendages, prothorax in great part, tegulae, legs, pec- tus, and saw-guides, black; wings smoky. Length 8 mm. (female) dulciaria 13. Mesonotum wholly rufous; body rufous, with eyes, labrum, antennae, tegulae, spot at base of front wings, and legs, black; first pair of legs sometimes rufous; wings strongly infus- cated. Length 10-12 mm rubiginosa Mesonotum more or less marked with black 14 14. ^lesonotum black; body red, with antennae, legs, and a spot on mesonotum, black; wings infuscated, clearer at apex. coccinea Mesonotum rufous with a black spot coA^ering the three lobes of mesonotum and scutellum in part; body rufous, with apices of mandibles, eyes, antennae, palpi, a spot on meso- No. 22.] HYMENOPTERA OF CONNECTICUT. 163 notum, tegulae, and legs, black; wings infuscated. Length 14 mm rubra °H. ccerulea Norton. Howard, Insect Book, PI. xiv, Fig. 7. Larva feeds on white birch. H. dulciaria Say. Connecticut (E. N.). H. macleayi Leach. Howard, Insect Book, PI. xiii. Fig. 21. Larva feeds on Chinese honeysuckle, wild cherry, white and black birch, mountain ash, willow, strawberry, and Ainelanchier. Con- necticut (E. N.) ; New Haven, 27 May, 1906, 4 August, 1905; Colebrook, 20 July, 1905 (W. E. B.). H. abdominalis Leach. Larva feeds on willow. Orange, 21 June, 1905 (W. E. B.) ; Westville, 2 June, 1908 (B. H. W.) ; New Haven. 30 Mav, 191 1 (A. B. C), 31 July, 18 August, 1910 (B. H. W.). ^ H. clavicornis (Fabricius). Howard, Insect Book, PI. xiv, Fig. 12. Larva feeds on willow. Connecticut (E. N.). °H. virescens Klug. Larva feeds on Betula, Salix, and Pyrus. H. scapularis Klug. Howard, Insect Book, PI. xii. Fig. 20. Larva feeds on white birch and elm. New Haven (B. H. W.) ; Mt. Carmel, 24 June, 1904 (W. E. B.) ; Yalesville, 26 May, 1908 (B. H. W.). H. humeralis Beauvois. Howard, Insect Book, PI. xiii, Fig. 9. Larva feeds on poison ivy. Connecticut (E. N.) ; Branford, 26 July, 1905 (H. W. W.) ; Southington, 12 July, 1910 (W. E. B.).^ °H. miniata Klug. Howard, Insect Book, PI. xiv. Fig. 17. °H. sphinx Kirby. °H. pectoralis Leach. Howard, Insect Book, PI. xiii. Fig. 14. Larva feeds on birch. H. rubiginosa Beauvois. New Haven, 30 July, 1905, 8 August. 1907 (B. H. W.) ; Lyme, 3 July, 1910 (A. B. C). °H. coccinea Fabricius. H. rubra Klug. Howard, Insect Book, PI, xiii, Fig. 19. Stonington, 26 August, 1906 (J. A. Hyslop), 164 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [BuU, SCHIZOCERIN^. Schizocerus LePeletier. Key to Species. 1. Abdomen wholly or for the most part yellow or rufous 2 Abdomen wholly black or with a lateral yellow or rufous band 3 2. Prothorax black; body black, with supraclypeal area, clypeus, labrum, middle and hind coxae and trochanters, front tibiae and basal segments of tarsi, metanotum and basal plates sometimes, and abdomen, except apices of saw- guides sometimes, yellow; wings infuscated. Length 8 mm privatus Prothorax wholly or in great part rufous; body in female rufous, with clypeus, labrum, mandibles, antennae, square area about ocelli, lower orbits, two spots on pectus, legs except front tibiae and their tarsi in front, basal plates, and saw-guides, black; wings infuscated. Male has body black, with prothorax in great part, tegulae, knees of all legs, front and middle tibiae, and abdomen except at apex, yellow or rufous; wings smoky, clearer at apex. Length 7-8 mm plumiger 3. Collar more or less pale 4 Collar entirely black; body wholly black, with legs below knees, pale, usually more or less infuscated; antennae elongate, and more or less infuscated; wings smoky. Length 7 mm ebenus 4. Tegulae and collar narrowly margined with white; body black, with collar, tegulae, legs below knees, and a broad margin on apex of each abdominal tergite, white, more or less suffused with rufous; head and thorax metallic black, and densely covered with fine, white setae; wings hyaline, veins brownish. Length 7 mm sericeus Tegulae and collar broadly yellow; body black, with pro- thorax, tegulae, mesonotum more or less on each side, front and middle legs below the knees, tip of posterior femora, base of their tibiae more or less, and a band along lateral margins of abdomen more or less, yellow; wings hyaline, veins and stigma black or brown. Length 6-7 mm zabriskiei S. privatus Norton. Stonington, 9 August, 1906 (J. A. Hyslop). °S. plumiger (Klug). Howard, Insect Book, PI. xiv. Figs, i and 6. °S. ebenus Norton. Larva feeds on sweet potato. °S. sericeus Norton. No. 22.] HYMENOPTERA OF CONNECTICUT. 165 S. zabriskiei Ashmead. Howard, Insect Book, PI. xii, Fig. 12. Larva feeds on purslane. Westville, 20 June, 1905 (W. E. B.) ; New Haven, 26 June, 1905, 3, 8 September, 1910, 6 August, 1911 (W. E. B., H. L. V., B. H. W.) ; Hamden, 24 July, 1910 (B. H. W.) ; Branford, 30 June, 1911 (W. E. B.). ACORDULECERIN^. Acordulecera Say. Key to Species. 1. Pronotum entirely white or luteous 2 Pronotum either wholly black or piceous, the collar a narrow, pale margin 7 2. Mesothorax luteous with black markings 3 Mesothorax black 6 3. Front impressed about median ocellus, producing a more or less distinct pentagonal area; median fovea triangular and distinct; head black, antennas fuscous; clypeus, labrum, mandibles, thorax except a spot on each lobe and apex of scutellum, legs, and abdomen, luteous; wings hyaline, costa, veins, and stigma luteous; saw-guides retracted. Length 5 mm media Front not impressed about median ocellus; median fovea wanting 4 4. Antennae wholly black 5 Antennae with the two basal segments white; clypeus, labrum, and mandibles, white, remainder of head black; remain- der of body luteous, except a black spot on each lobe of mesonotum and the scutellum; wings hyaline; third seg- ment of antenna; but little longer than fourth; saw-guides retracted. Length 4-5 mm biclinia 5. Front with short, fine pubescence, so that head appears glossy black; pubescence of antennae black, antennae black; head black, with labrum, clypeus, and mandibles white; thorax, except scutellum and a spot on each lobe of meso- notum, legs and abdomen luteous; saw-guides exserted, and broadly, roundly truncated at apex; third segment of an- tennae about as long as the fourth and fifth together. Length 4 mm minima Front with long pubescence which conceals glossy black of head and gives it a hoary appearance; antennae black, with white hairs; head black, with labrum and mandibles white; prothorax luteous; mesonotum and scutellum black; pleuras and pectus piceous; legs and abdomen luteous; wings hyaline; saw-guides retracted; third segment of an- l66 COXXECTICUT GKOL. AND XAI. HIST. SURVEY. [Bull. teniiffi about as long as the fourth and fifth together. Length 5 mm maxima 6. Antennae pale; wings hyaline; bodj' black, with clypeus, labrum, and mandibles, white; prothorax, legs, venter of abdomen and four basal segments of tergum, luteous; antenn.-e densely hoary, pubescent; saw-guides retracted, teeth of saws rounded; antennae with third segment but little longer than fourth; front not impressed about me- dian ocellus; median fovea wanting. Length 4 mm dorsalis Antennae black; wings more or less infuscated; body black, with clypeus, labrum, mandibles, prothorax, legs, venter of abdomen, and four basal tergal segments at middle and sides, }-ellow or luteous; head hoary with pubescence; saw-guides exserted, convex above and below, and broadly rounded at apex. Length 5 mm maura 7. Antennae wholly white 8 Antennae wholly black or fuscous 9 8. Front with a median furrow; median fovea wanting; body black, with clypeus, labrum, mandibles, antennae, tegulae, legs, basal half of venter, and a large triangular spot on middle of dorsum of abdomen at base, white or luteous; head covered with very fine, white pubescence, appearing bare when viewed from before; notum and pleurae with fine pubescence; saw-guides with two sides parallel and oblique!}- truncated to a point at apex above. Length 5 mm mellina Front without a median furrow; median fovea indicated by a minute pit; body black, with antennae, clj-peus, labrum, mandibles, collar narrowly, tegulae, legs, and basal half of abdomen, greenish white or luteous; head and antennae covered with long, black pubescence; pubescence of notum short, sparse, and white; saw-guides broadly convexly rounded at apex. Length 4-5 mm mixta 9. Pronotum wholly black 10 Pronotum piceous. margined with luteous: body black, with clypeus. labrum. mandibles, pronotum, and dorsum of ab- domen, more or less piceous; tegulae, legs, and venter of abdomen, luteous; head and thorax densely coverecj with long pubescence; third segment of antennae about as long as fourth and fifth together ; saw-guides broadly rounded at apex, with a distinct scopa. Length 5 mm munda 10. Antennae with third segment considerably longer than fourth il Antennae with third, fourth, and fifth segments subequal; body black, with clypeus, labrum, mandibles, tegulae. legs, and disk of abdomen at base, luteous; head and thorax covered with fine, white pubescence; cell R4 about as No. 22. J HYMEXOPTERA OF CONNECTICUT. 167 broad as long; transverse part of M2 received near its mid- dle; wings infuscated; sav^^-guides broad, and broadly rounded at apex. Length 3 mm minuta 11. Front wings with transverse part of Mj given off near mid- dle of cell R* 12 Front wings with transverse part of M2 given off nearer to vein Rs than to the middle of cell R4; body black, with clypeus, labrum, and mandibles, white, infuscated with piceous; legs, except tips of tarsi, and bases of wings, greenish white or luteous; head and thorax covered with fine, white pubescence; cell R* distinctly longer than broad; wings usually more or less infuscated; saw-guides broadly rounded at apex. Length 4 mm saginata 12. Wings infuscated on basal half; front wings with cell R« about as broad as long; head dilated behind the eyes; body black, with clypeus and labrum more or less white; legs except more or less of the tarsi, and basal half of tergum of abdomen more or less, white; head and thorax covered with fine, white pubescence; saw-guides very broad and squarely truncated at apex. Length 4 mm maculata Wings wholly hyaline; front wings with cell R4 much longer than broad; body black, with labrum, mandibles, legs, and bases of wings, white; head and thorax covered with short, white pubescence; head not dilated behind the eyes. Length 4 mm .* marina °A. media ^^lacGillivray. °A. biclinia Konow. °A. minima 2^IacGillivr.ay. °A. maxima MacGillivray. Larva feeds on Qnercus alba. A. dorsalis Say. Larva feeds on black oak. Connecticut (E. X.). A. maura ^MacGillivray. New Haven, 6 July, 1904 (H. L.V.). °A. mellina ^MacGillivray. °A. mixta ^MacGillivray. °A. munda MacGillivray. °A. minuta ^MacGillivray. A. saginata Provancher. Yalesville, 17 June, 1907 (B. H. VV.) ; Hamden, 14 June, 191 1 (W. E. B.). °A. maculata MacGillivray. °A. marina MacGillivrav. l68 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. XIPHYDRIID^.* Key to Genera. Radial and radio-medial cross-veins present . . . . Xiphydria p. i68 Radial cross-vein present, radio-medial wanting ..Konowia p. 169 Xiphydria Latreille. Key to Species. 1. Abdomen in great part black 2 Abdomen in great part red or yellow 4 2. Antennae black; posterior tarsal claws with a moderate-sized tooth 3 Antennae white at apex; posterior tarsal claws with a minute tooth; body black, with two small spots above antennae, orbits extending in a line behind eyes, base of mandibles, two lines on vertex, four lines on notum, a spot before the wings, and seven spots on each side of the abdomen, white; legs honey-yellow; wings hyaline. Length 10 mm. maculata 3. Legs rufous or yellow; third antennal segment about twice as long as second; body in female black, with a spot on clypeus, sometimes wanting, line beneath eyes, sometimes interrupted, two spots behind ocelli, posterior orbits, collar, and spot on each side of each abdominal segment, white; tegulae and legs, honey-yellow. Male has white spots on first four abdominal segments. Length 13 mm, canadensis Legs black, with bases of tibiae and tarsi white; third anten- nal segment subequal in length to second; abdomen with white spots on four basal segments. Length 11 mm tibialis 4. Head, thorax, and legs in great part, black; body in female black, with two pale spots behind ocelli, and bases of tibiae and tarsi, white; abdomen red. Male uniformly dark brown, with a yellow spot on pleurae and inner orbits, or sometimes entirely reddish yellow. Length 12 mm. attenuata Head, thorax, abdomen, and legs, honey-yellow; tips of man- dibles, spot on vertex, a line above bases of antennae, lines on neck, sutures of pleurae, sides of basal plates, and dor- sum of following abdominal segments except at middle, brownish. Length 10 mm erythrogastra * In the preparation of the tables dealinsr with this and the following families free use has been made of the manuscript of a paper by Dr. J. Chester Bradley, "A revision of the coll Rj grroup." The portion of this paper dealing with the Siricidae has been published since this manuscript was submitted, under the title, Siricidse of North America, in Journal of Entomol. and Zool., 1913, vol. 5, pp. 1-35. No. 22.] HYMENOPTERA OF CONNECTICUT. 169 X. maculata Say. Howard, Insect Book, PI. xii, Fig. 25. Larva bores in maple. Connecticut (E. N.) ; Wallingford, i, 25 June, 1910, (D. J. Caffrey). °X. canadensis Provancher. Howard, Ijjsect Book, PI. xiv, Fig. 34. Larva bores in white birch. 'iX. tibialis Say. X. attenuata Norton. Larva bores in birch. Connecticut (W. H. P.). °X. erythrogastra Ashmead. Konowia Brauns. °K. basalis (Say). Xiphydria basalis Say. Abdomen black, with the two basal segments honey-yellow, more or less mixed with black; legs, except the posterior tibiae and tarsi, honey-yellow ; wings hyaline. Length 8-9 mm. °K. walshii (Westwood). Xiphydria walshii Westwood. Abdomen piceous, with the middle segments margined at sides with white ; legs fulvous, with the tips of the tarsi fuscous ; antennae fuscous, with the bases luteous ; head black, with two spots behind the ocelli and a line on the lower and posterior or- bits, white ; collar narrowly, the sides and under surface of the prothorax, and two spots on the mesonotum between the wnngs, white. Length 9 mm. SIRICID^. Key to Subfamilies. Measured on vein M, free part of M2 is midway or much nearer to the free part of R* than to the radial cross-vein; antennae filiform, with at least seventeen segments: anal cerci present in male Siricin^ p. 169 Measured on vein M, free part of M2 is opposite the radial cross-vein, or always much nearer to the radial cross-vein than the free part of M4; antennae thickened at middle, never with more than fourteen segments; anal cerci want- ing in male Tremecin.^ p. 172 SlRICIN^. Key to Genera. I. Cornus at apex of abdomen of female constricted at base, spear-shaped; front wings with free part of Cus usually 170 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [BuU. wanting, sometimes represented by a small spur; head with a white spot behind the eyes 2 Cornus at apex of abdomen of female either shouldered or not, but never constricted at base and spear-shaped; front wings with free part of Cu2 distinct; head without a white spot behind the eyes; posterior tibiae with two apical spurs Sirex p. 170 2. Posterior tibiae with two apical spurs; ovipositor about as long as the abdomen, and always much shorter than the body Urocerus p. 171 Posterior tibise with only a single apical spur; ovipositor al- ways much longer than the abdomen, and sometimes longer than the body Xeris p. 171 Sirex Linnaeus Key to Species. 1. Abdomen blue-black 2 Abdomen more or less red 3 2. Legs blue-black; abdomen short, cornus short and shouldered, ovipositor projecting but little beyond its tip; body steel- blue, with first pair of legs below knees dark ferruginous; wings violaceous. Length 35 mm. (female) edwardsii Legs rufous; cornus elongate, pointed, not shouldered at base, diminishing gradually in size; body black, with legs beyond trochanters, and base of ovipositor, yellow or rufous; wings hyaline or nearly so, sometimes with a spot below the stigma and apex of the wings infuscated. Length 16-30 mm. (female) cyaneus 3. Wings violaceous; body blue-black, with legs beyond knees, sometimes the whole of the legs, abdomen beyond first or second segment, cornus, and ovipositor, red; cornus some- what convex at sides but not distinctly shouldered. Length 28 mm. (female) nigricomus Wings hyaline or yellowish, apical margins sometimes some- what infuscated 4 4. Legs entirely blue-black 5 Legs with posterior femora rufous; body bluish, with poste- rior legs more or less, and abdomen beyond second or third segment, rufous; wings hyaline or nearly so. Length 15-30 mm. (male) cyaneus 5. Abdomen entirely rufous beyond basal plates or first seg- ment; antenn.ne and posterior tarsi sometimes marked with rufous. Length 20 mm nigricomus Abdomen blue-black, with only the fifth or sixth segment rufous (male) edwardsii No. 22.] HYMENOPTERA OF CONNECTICUT. I/I ^S. edwardsii (Brulle). Uroccrus edivardsii Brulle. Howard, Insect Book, PI. xiii, Fig. 3. S. cyaneus (Fabricius). U rocerus cyaneus ¥2ihx\cms. How- ard, Insect Book, PI. xiii. Fig. 12. Larva bores in spruce and fir. Connecticut (E. N..) °S. nigricornus (Fabricius). Urocerus nigricornus Fabricius. Howard, Insect Book, PI. xii. Fig. 21. Urocerus Geoffroy. Key to Species. 1. Abdomen entirely black; body black, with antennae more or less at middle, a large spot behind each eye, a spot on each side of the seventh abdominal segment, and basal half of tibiae and tarsi, white; wings strongly infuscated. Length 27 mm albicornis Abdomen wholly or in part yellow or rufous 2 2. Wings yellowish hyaline; body black, with antennje yellow, or yellow at base and brownish toward tip, sometimes black in male; tibiae a'nd tarsi brown or yellow, poste- rior tibiae and tarsi black in male; basal plates, and ab- dominal segments one to seven more or less yellow. Length 35 mm flavicomis Wings strongly infuscated or violaceous; body black, with antennae more or less at apex, and basal half of posterior tibis and the metatarsi, white; abdomen usually with first and third or fourth apical segments reddish yellow, or at times with entire abdomen reddish yellow. Length 20 mm. cressoni U. albicornis Fabricius. Howard, Insect Book, PI. xii, Fig. 24. Larva bores in spruce, hemlock, and fir. Connecticut (E. N.). U. flavicornis Fabricius. Urocerus abdouiinalis Harris. Howard, Insect Book, PI. xiii, Figs. 17 and 24. Connecticut, (E. N.) ; Hamden, 15 June, 191 1 (A. B. C). U. cressoni Norton. Xeris Costa. °X. caudata (Cresson). Urocerus caudatus Cresson. How- ard, Insect Book, PI. xiii, Fig. 29 ; and PI. xiv, Fig. 36. Body black, with a spot behind the eyes and the collar more or less, white; the legs entirely obscure, luteous or brownish; the ovipositor reddish brown ; wings subhyaline, more or less stained with fuscous. Length 23 mm. 172 connecticut geol. and nat. hist. survey. [bull. Tremecin^. j Tremex Jurine. *T. columba Linnaeus. Howard, Insect Book, p. 70, Fig. 41 ; PI. xii. Figs, o."] and 23 ; PI. xiii, Fig. 31. Body varying from almost entirely black with yellow trian- gular marks on the abdomen, to almost yellow with a narrow api- cal black margin ; antennas usually yellow ; legs usually pale, femora black above in dark individuals ; wings varying from strongly infuscated to yellowish hyaline. Length 18-40 mm. Larva bores in maple, elm, apple, pear, beech, oak, and sycamore. Connecticut (E. N).; New Haven (Bolton); East Hartford (W. E. B.). CEPHID^. Key to Genera. 1. Radial cross-vein always shorter than first abscissa of radial sector, the two converging toward the radio-medial cross- vein 2 Radial cross-vein subequal in length to or shorter than first abscissa of radial sector, the two subparallel; base of radial sector sometimes atrophied; posterior tibiae with two preapical spurs Janus p. 172 2. Posterior tibiae with one preapical spur 3 Posterior tibiae with two preapical spurs 4 3. 'Flagellum with first two or three segments usually distinctly contracted; posterior tarsal claws bifid . . . .Macrocephus p. 174 Flagellum never with first two or three segments distinctly contracted, distinctly thicker in the middle than at base or apex; posterior tarsal claws broadly expanded at apex and slightly emarginate between the two portions Adirus p. 173 4. Abdomen of male with two apical ventral segments with fringes or brushes of bristles, sometimes placed in deep scars; saw-guides of female, as seen from above, widened at apex Trachelus p. 174 Abdomen of male with ventral apical segments sometimes with short hairs, never with fringes or brushes of bristles; saw-guides of female, as seen from above, with their sides parallel and not widened at apex Cephus p. 174 Janus Stephens. Key to Species. I. Front wings with base of radial sector always present 2 Front wings with base of radial sector always atrophied; No. 22.] HYMENOPTERA OF CONNECTICUT. 173 body black, with labrum, a line at base of wings and another on scutellum, and a triangular spot on metathorax, white; legs (except a white line on underside of tibiae, and posterior tibiae and tarsi which are black) and first and second abdominal segments, rufous; wings entirely hyaline. Length 9 mm abbreviatus 2. Front wings hyaline, with a fuscous spot below the stigma; body black, with tegute, collar, metathorax in part, and basal third of tibiae, white; three basal segments of abdo- men, and legs, except parts named and posterior tibiae and tarsi in female which are black, rufous. Length 8 mm integer Front wings hyaline, with a fuscous spot in cells R3 and Mi; body in female black, with a spot on mandibles, palpi, collar, stripe on pleurae, spot on coxae, and trochanters, straw-white; four basal segments of abdomen, and legs below trochanters, yellow-red. Male with antennas fer- ruginous, and base of abdomen more or less black. Length 9 mm bimaculatus °J. abbreviatus (Say). Cephiis abbreviatus Say. Phylla:cus integer Riley. Howard, Insect Book, p. 71, Fig. 43; PI. xii, Fig. 22. Larvae bore in the stems of willow and poplar. *J. bimaculatus (Norton). Cephus bimaculatus Norton. Farmington (E. N.). J. integer (Norton). Cephus integer Norton. Cephus Havi- ventris Fitch. Currant Stem Girdler. Larva tunnels in the pith of currant. Windham, New Haven (W. E. B.) ; New Haven, 21 May, 1913 (B. H. W.). Adirus Konow. A. trimaculatus (Say). Cephus trimaculatus Say. Howard, Insect Book, pi. xiii. Fig. i. Body shining black, with two spots on the inner orbits, the base of the mandibles, spots on the clypeus, all sometimes wanting, and a spot on each side of the fourth abdominal tergite, yellow; the whole of the anterior tibias and the basal half of the middle tibiae white; wings varying from hyaline to infuscated. Length 15-18 mm. Larva bores in the stems of blackberry. Connecticut (E. N.). 174 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [BuU. Macrocephus Schlechtendal. °M. bicinctus (Provancher). Cephus bicinctus Provancher. Body black, with the cheeks, a small spot on each side of the vertex, a spot on the sides of the metathorax, and the apex of the third and fifth abdominal tergites, white ; tibiae and tarsi brown- ish; wings hyaline. Length 12 mm. Trachelus Jurine. °T. tabidus (Fabricius). Sirex tabidus Fabricius. Body black, with the mandibles except at apex, front margin of the clypeus, the front legs beyond the middle of the femora in great part, a band on each side of the abdomen, and a spot at the apex of the fifth and sixth sternites, yellow ; wings somewhat in- fuscated. Length 9 mm. Cephus Latreille. °C. graenicheri Ashmead. Abdominal tergites five and six with their apical three-fourths broadly yellow ; body black, with the mandibles except at apex, the clypeus, cheeks, palpi, two spots beneath the wings, the legs ex- cept the trochanters and tips of the tarsi, a large spot on each side of the second abdominal tergite, practically the whole of the third tergite, a spot on each side and on the dorsum of the fourth, three-fourths of the apex of the fifth and sixth and the apex of the last segment, yellow ; wings yellowish hyaline ; saw-guides truncate at apex. Length 11 mm. C. pygmaeus Linn?eus. Howard, Insect Book. p. 70, Fig. 42. Fifth abdominal tergite with its apical half and the apical mar- gin of the sixth, yellow ; body in female black, with the mandibles at base, the palpi, the legs beyond the knees, always more or less infuscated, the apical half of the third and fourth abdominal ter- gites, a spot at middle of the apex of the sixth, and the apical margin of the last segment, yellow ; wings hyaline ; saw-guides broadly rounded at apex. Male differs in having the clypeus. the cheeks, the coxae, the trochanters and femora beneath, and a spot on the side of the second and fourth abdominal segments, yellow ; length 9 mm. Larvae infest the stems of wheat. No. 22.] HYMENOPTERA OF CONNECTICUT. 175 ORYSSID^. Oryssus Latreille, Key to Species. 1. Abdomen entirely black; edge of ridge concealing bases of antennae not strongly reflexed; antennse distant at base; legs marked more or less with white or reddish; wings hyaline, with a smoky transverse band beyond the mid- dle. Length 8-12 mm sayi Abdomen not entirely black 2 2. Abdomen with three apical segments red ....sayi var. terminalis Abdomen with six apical segments red ....sayi var. occidentalis O. sayi Westwood. Larva bores in maple. Stoniiigton, 26 June, 1906 (W. E. B.). O. sayi var. terminalis Newman. Howard, Insect Book, PI. xii. Fig. 26. Larva bores in maple. Hamden, 15 June, 191 1 (W. E. B.) ; Stonington, 5, 17 June, 1914 (L W. Davis). °0. sayi var. occidentalis Cresson. Larva bores in sugar maple. 176 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [BuU. ICHNEUMONOIDEA. From the standpoint of economic parasitology this is one of the most important groups of insects. It is represented in Con- necticut by many species. Many of these will, no doubt, prove exceedingly useful in the hands of man when he has learned to breed and manage them for the purpose of controlling injurious insects. The greatest care must be exercised in classifying the insects of this group, because the multiplicity of species and their close relationship make their recognition a difficult subject indeed. This group is so homogeneous that in order to classify its com- ponents a knowledge of the general appearance and character of the insects as a whole, or habitus, is quite essential. Habitus al- though sufficiently tangible to the experienced eye can not be sat- isfactorily described, so the beginner must have access to an authoritatively determined collection, or, such not being avail- able, recourse must be taken to a study of the figures of von Vollenhoven in his two works, the Schetzen and Pinacographia. Inasmuch as the Icheumonoid fauna of this state is imper- fectly known, the keys in the following pages cannot be regarded as final, although in many cases they will lead the student to a satisfactory conclusion. QL MacGillivray, Alexander Dyer, 568 1868-1924. T3M3 Tenthredinoidea. Ent. QL T3M3 MacGillivray, Alexander Dyer, Ent. 1868-1924 Tenthredinoidea SMITHSONIAN INSTITUTION UBRARIES ^ ^" nSntQL568J3M3 Tenthredinoioea /