^-^I^J.' From *e ^^'''li Bulletin OV THE Illinois State Laboratory Olf Natural History Urbana, Illinois, U. S. A. STEPHEN A. FORBES, Ph.D., L.L.D., Director Vol. X. May, 1915 Article VL THE CHIRONOMID.*^, OR MIDGES, OF ILLINOIS, WITH PARTICULAR REFERENCE TO THE SPECIES OCCURWING IN THE ILLINOIS RIVER BY , .J John R. Malloch "^ V Bulletin Olf THE Illinois State Laboratory o» Natural History Urbana, Illinois, U. S. A. STEPHEN A. FORBES, Ph.D., E.L.D., >.>.-- Director ^-^0 Vol. X. May, 1915 Article VL THE CHIRONOMID.E, OR MIDGES, OF ILLINOIS, WITH PARTICULAR REFERENCE TO THE SPECIES OCCURRING IN THE ILLINOIS RIVER BY John R. Malloch COiNTENTS PAGE Intmliu-tioM 217-289 Mi'tho.ls of eollo('tin,ij; 277 Methods of rearing 278 Methods of pre! #Vs,-. Vf> ■^^^-^K:^^ /■ ^ -^ i -f m J W\ .^« Ar-//.u /f Fiji-. 1 Fi^-. 2 Fij?. 3 Fig. 4 Fiji'. f) Fiji'. (i Fiji'. 7 Fiji'. S Fiji'. !) Fiji'. 10 Fiji'. 11 Fiji;. 12 Fiji', i:] Fiji'. 14 Fiji', ir, Fiji'. Ki Fiji'. 17 Fiji'. IS Fiji'. 1*) Fiji'. 20 Fiji. 21 Plate XVITI Liiriutl (iiul I'lipdl I)( hills of (\ rdlopixjoiilniv (Urdloponoit f ifscnl lis, doi'sjil jibdoiiiiiial hiistlc of pupa. Fonipontj/id ell I pis. st'ction (if thoracic I'cspiratoi'v orjian of pupa. The same, L-iteral ahdoiiiiiial hrisUe of ])iipa. The same, dorsal l)ristle of larva. The same, dorso-lateral l)i'istle of larva. The same, antei'ior thoracic bristle of pii]).i. Ccrdlopof/on fiisctd us, lateral view of second al)d(»miiial scji- ment of ])upa. Forcipoinip'd pcrf/a ndi I ?. lateral view of second ahdomiiial seji'iuent of ])ii])a. Fdrvlpimniid cilipcs, claws of anterior ])scudopods. The same, claws of ])osterior psciidopods. Forcipoiiuild spcciildrls, doi'sal sui'face of ahchnuinal seg'- mciit of larva. Pdlpoinijid lon(jip( lutls, maiidil)le of larva. The same, lal)iiim of larva. Forcipomijla spccuhiris, mandible of larva. Furvlponinid pcrgdudci?, antenna of larva. Pdlpomjild lon(/lj>e}i)ils, hypopharynx of larva. Forcipinnipd spccdlaris, dorsal hristle of larva, front view. The same, dorsal liristlc of larva, side view. Ccrdfop()(ji))( fusctdiis, ari'anji'emeiit of bristles on thorax of ]nipa. Forclpomjild spi ctddrls, ai'ranjit'incnt of l)ristles on thorax of ])ni)a. Forciponwjld p< ffpnidi I ?, anterior thoracic bristle of pui)a. l^r.ATi-; X\ III Plate XIX Sfrucfural Dctdils of Ccralopof/ojiinir Fiji'. 1. Ccratopogon fnscultis, antenna of female. Fif?. 2. Forcipomyia spccularis, hypopygiuni, dorsal view. Fig. 3. Forcipomyia cilipes, palpus of male. Fiji'. 4. The same, apex of abdomen of female, latei'al view. Fiji', f). The same, fourth antennal joint of female. Fig. (). Ccrafopo}}nii(i cHipfs, hypc)py>;-iuni, one side. Fiji'. 12. Forvipom\iui durca, hypo])ygiuni, one side. Fig. :>. Forcipomiiid sq}i(imipes, hypoi)ygiuin, one side. Fig. 4. Forciponiyid cnipes, hind tibia of female. Fig. f). Forvipoinijid pergdiidi u apical fonr antennal joints of male (denuded). Fig. G. Forcipomyid cilipes, apieal four antennal joints of male (denuded). Fig. 7. Forciponiifid dun (t, aj/ical foni' antennal joints of male (de- nuded). Fig. 8. Forcipomyid spiciddris^ apieal four antennal joints of male (denuded). Fig. 9. Pseudoculicoides major, hypoi)ygium, one side. Fig. 10. P.seudoculicoides joliannsem, hy])0])ygium. one side. Fig. 11. Forcipomyid cilipes, three basal flagellar joints of male (denuded). Fig. 12. Forcipomyid sijccuhiris, seeond and thii'd llagellar joints of same. P^ig. I'A. Forcipomyid sp( cdJaris, same joints of female. Fig. 14. Ceratopogon levis, second flagellar joint of male. Fig. If). Cerdfopof/on levis, apieal flagellar joint of male. Fig. 1(). Pidpomifid illinoensis, respiratory organ of ])ui)a. Fig. 17. Pseudoculicoides cmc.tns, hypopygium, one side. Fig. IS. Cerdfopogon fusculus, hypopygium, one side. Fig. 19. Cerdtopogon levis, hyi)opygium, one siele. Fig. 20. Cerdfopogon fiisinervis, hy])0])ygium, one side. Pi. ATE XXI \ \/s jkma/u,/:. ./^, Fi> Fis •1 o. Fis 4. Fi«- f). Fi^ (). Fio. 7. Fis 8. Fis- 9. Fij>- 10. Fis n. Fi^ 12. Plate XXII Whifjs of Ccrdfopoyonina' Forcipomyia s'pecuhiris, male. Culicoidcs varipcnms, female. Culicoides sanguisugus, female. Culicoidcs guffipcnnis, female. Culicoidcs sfcllifcr, male. (Udicoidcs luvmatopwtus, female. Culicoidcs crcpuscidaris, female. Ccraiopogon fusculus, female. Prohczzia glahcr, female. Pidpomyia scliwarzi, female. Hartomyia picta, male. .loluinnscvomyid hlnidculdtd, female. Pii<]es liierogliipliicus, thoracic dorsum. Prodddius tlioracicus, head and anterior portion of thorax. lateral view: P., pronotum ; M., mesonotnm ; Sp., ante- rior spiracle ; Cox., anterior coxa. .Jolianns€nom\ii(i (irgenfnta, head and anterior yjortion of thorax, lateral view: P., pronotum; 71/., mesonotum; Sj)., anterior spii'acle; Cox., anterior coxa. Ccrafopogon fusincrvis, head and anterior portion of thorax, latei-al view : P., pronotum ; 31., mesonotum ; Sp., anterior spiracle ; Cox., anterior coxa. Cliironojnus sp. B., ventral surface of labrum. Clivronomus digUdfiis, lateral arm of labrum. Dixa sp., labium. Cli'irovomus ten fans?, labial papilla*. Diamcsii ivalflii, hypopygium. Dixa sp., head, dorsal view: A, antenna; B, clypeus; C, labrum ; D, maxillary palpi ; E, mandible ; F, maxillary lobe (?). Pl.ATK XX HI Plate XXIV Fiii- 1 ViiX 2 h'\iX o •j. Fio- 4 Fi^- 5. Fi«' (;. Fio- 7. Fig s. Fi- !). Fii>- 10. Fi- 11. Fig 12. Fig- 13. Fig 14. Fig If). Fig l(i. Fig 17. Fig IS. Fig 1!). Larval and PkjxiJ J)( laih of TaujipiHiv Ta)ii}pi(s }ito)ii]is, larva, just Ix'fore puliation. The same, antenna of larva. Frotenthcs cidiciformis, antenna of larva. The same, maxillary palpus of larva. Profenfhes sfclJdli^s, a])ical alxlominjil append.-igc of pupa. rrocIiKlius C(>)iciinii(s, maxillary ])al])us of larva. Taujipiis illinocnsu, pupa. Tl( iiUk s ciiJicifotniiis, thoracic I'cspii'atory organ of i)upa. Tanijpus sp. A, maxillary pali)us of lai'va. The same, antenna of larva. Taiijipas i)i](>s(lJus.\ thoracic res])ii'atory oi'gan of ]>upa. Procladiiis c(nK'iinriis, jintenna of larva. T(t)i>ipiis (hiari, tlioracic r('si)iratory oi'gan of ]nipa. Tdiiiipiis s]). A, man(lil)le of larva. Taiijipas (liiari, mandihle of lai'va. TitHjipns ynonUis, thoracic res])iratoi'y organ of ])upa. P1.AT1- XX1\- ««fe?;^,,;^#^.«^:...";^ 7 ^-^^^^^^" \,_^^''r;,;XA:^E«C5^^.^^''?^ i.'-i3>-^ f^^^fi^*^^' -, 11 12 13 ^i??''^^ '^^... 19 Fig 1 Fig 2 Fig 3 Fig 4 Fig 5 Fig 6 Fig 7 Fig 8 Fig 9 Fig 10 Fig 11 Fig 12 Plate XXV Larval Details of Tanypina' Tanypus clijari, labial jilate of larva. Tanypus sp. A, labial ])late of larva. Protentlic.s carncuss, labial plate of larva. Tanypus sp. A, labial ])ai)illa' of larva. Tanypus sp.' B, labial ])late of larva. Procladius concninus, labial plate of larva. Tanypus inonilis, labial i)late of larva. Protcnflics ctilicifonnis, labial ]ilate of larva. Prochidius concinnus, labial papilla; of larva. Tanypus decolorafu.s, labial plate of larva. Tanypus pilosdlusf, labial ]ilate of larva. Procladius concinnus, labruin of larva. Plati- XX\r A f\ \ M U // ^ - :f\ & ir yj? Fig. 1. Fig. 2. Fig. 3. Fig. 4. Fig. 5. Fig. 6. Fig. 7. Fig. 8. Fig. 9 Fig. 11. Fig. 12. Fig. 13. Fig. 14. Fig. 15. Plate XXVI Larval and Pupal Details of Tanijpina' Taniipus decolorafus, mandil)le of larva. Tanypus dyari, mandible of larva. T any pus dyari, hypopharynx of larva. Protenthes punctipennis, apical abdominal appendage of pupa. Tanypus dyari, claw of ])osterior pseiido])od of larva. Prodadius concin)ius, lateral abdominal hair of larva. Protcn flies euliciformis, under side of head of larva, show- ing location of different organs. Tanypus pilosellusf, apical abdominal appendage of pupa. 9 and 10. Protentlies hellus, claws of posterior pseudopods of larva. Tanypus dyari, antenna of larva. Protentlies hellus, apical abdominal appendage of j^upa. Protentlies punetipennis, thoracic respiratory organ of pupa. Tanypus 2yilosellus?, under side of larval head. Procladius eoneinnus, apex of abdomen of larva, dorsal view. Plate XX\q J^yyun^yr: Fig. 1. FiR-. 2. Fiji-. o O. Fij?. 4. Fig. 5. Fig. 6. Fig. 7. Fig. 8. Fig. 9. Fig. 10. Fig. 11. Fig. 12. Plate XXVII Structural Details of Tanypina' Prot entiles stellatus, hypopygiiim, one side. Protentlies punctipennis, wing. ProtentJies punctipennis, hypopyginm, one side. Procladius concinnus, thoracic respiratory organ of pupa. Protentlies stellatus, wing. Tanijpus decoloratus, thoracic respiratory organ of pupa. Protentlies claripennis, apical portion of lateral arm of hypopygium. Protentlies cliorcus, wing. Protentlies hellus, thoracic respiratory organ of pnpa. Tanypus marginellus, hypopygium, one side. T any pus monilis, wing. Tanijpus dyari, hypopygium, one side. Plate XXVII r ^ I '3 10 11 Fig. 1. Fig. 2. Fig. o Fig. 4. Fig. 5. Fig. 6. Fig. 7. Fig. 8. Fig. 9, Fig. 10. Fig. 11, Fig. 12 Plate XXVIII Eiipopiigia of Tanyimue Tanypus decoloratus. T any pus liirtipenms. Tanypus melanops. Prate nfhes clwreus. ProtentJies culiciformis. Prodadius concinnus. Protenflies riparius. Prod ad ins scapidaris. Prodadius flwracicus. Tanypus illinoensis. Tanypus monilis. Protenflies hellus. Plate XXVIII 22 JKlA^u^L'lL Fio-. 1. Fi^-. 2. FiK- 3. Fio-. 4. Fi^^ 5. Fig. 6. Fig. 7. Fig. 8. Fig. 9. Fig. 10. Fig. 11. Fig. 12. Fig. 13. Fig. 14. Fig. 15. Fig. 16. Fig. 17. Fig. 18. Fig. 19. Fig. 20. Fig. 21. Fig. 22. Fig. 23. Plate XXIX Larval Labia of (l\ironomina> CMronomus ffavicinf/ula. CJiironomus viridis. Diamesa walflii. Cluronomus fiavus. Cliironomtis sp. B. CJiironom us fulvivenfris. Chironom us lohiferus. CJiironomus lohiferus, var. ? Cliironomus tenians? CMronomus viridicolUs. CJiironom us viridicollis, aljerration. Cricofop us trifnscia tus . OrtJiochidius sp. A. Tanytarsus sp. C. Genus incertus A. OrfJioeladius nivoriundus. OrtJiochidius sp. E. Genus incertus D. Tanytarsus e.riyu }is. OrtJiocladius h\). C. OrtJiocladius s]). B. Genits incerttis C Genus i}icertus B. Pl.ATK XXIX •r« M.//.,x -A Fig. Fig. 1. 2 Fig. 3. Fig. 4. Fig. 5. Fig. Fig. 6. 7. Fig. 8. Fig. 9. Fig. 10. Fig. 11. Fig. 12. Fig. 13. Fig. 1-1. Plate XXX Larval Details of Chironomina' Genus iyicertus A, mandible. Cliironomus sp. B, antenna. Cliironomus sp. B, mandible. (rcnus incertus D, antenna. Cliironomus sp. B, maxillary palpns. Cliironomus sp. B, anteiuia. Genus incertus B, anal segments. Genus incertus C, antenna. Cricotopus trifasciatus, antenna. Cliironomus fiavicingula, antenna. Genus incertus B, antenna. Cliironomus cligitatus, mandible. Cliironomus digitatus^ labium. Cliironomus 2)aUiatus, mandible. Plate XXX :i3 Fir-. 1. Fig. 2. Fig. 3. Fig. 4. Fig. 5. Fig. 6. Fig. 7. Fig. 8. Fig. 9. Fig. 10. Fig. 11, Fig. 12. Fig. 13. Fig. 14. Fig. 15, Fig. 16. Fig. 17. Fig. IS. Plate XXXI Detdils of Clfirononuis Pupce Frontal tubercle of fiavicingula. Dorsal abdominal lol)e of lohiferus. Apieal lateral pi'oeess of segment 8 of decor us. Second dorsal al)donnnal segment of ffdvicinguhi. Ventral surface of apical segment of digitatus (female). Apical lateral pi-ocess of segment 8 of viridis. Second dorsal al^dominal segment of viridis. Dorsal abdominal setiila^ of viridis: a, h, and c, setuhv of transverse group ; d, setula of central group. Second dorsal abdominal segment of digitatus. Third dorsal al)dominal segment of modcstus. a and h. Apical lateral pi'ocess of Cliironomus sj). A, show- ing variation in form in dift'ei'ent individuals. Frontal tubercle of decor us. Third dorsal abdominal segment of indistinctus. Apical lateral process of segment 8 of mdistinctus. a, reticulation of abdominal segments; h, c, d, dorsal abdom- inal setula^ of digitatus. Apical lateral process of segment 8 of paUiatus. Apical lateral process of segment 8 of modcstus. A]Mcal lateral i)rocess of segment 8 of flavicinguht. Plate XXXI Flo:. 1. Fiji-. 2, Fig. 3. Fig. 4. Fig. 5. Fig. 6. Fig. 7. Fig. 8. Fig. 9. Fig. 10. Fig. 11. Fig. 12. Fig. 13. Plate XXXII Sfnicfurdl Dctdils of Cliironomina' (inci Ldvvitl Case of Tonjifdrsus Cliirononuis crdssicduddtus, paljnis of male. Chironomus fcntdus f, larva. Cliironomus quddriijunctdfiis, palpus of male. Clivronomus j^lwi^iosus, labium of larva (after Johannscn), Tduytdrsus sp.?, larval ease. CMronomus paUidtus, labium of larva. Cricotopus irifdsciatus, pupa. Chironomus nigricdns, palpus of male. Tricliocladius i)olitus, tarsal elaw of male. Cli ironom us ferrugineoviitaius, male. Cliironomus ta'niapennis, palpus of male. Cliironomus pdUidtus, antenna of hermaphrodite. Cdmptoclddius ldsio2)s, antenna of female. Plate XXXII Plate XXXIII Ilijpopijgia of Cliirfnionuis spp. (J. fentans. C. x>seudoviridis, one side. C. viridis, one side. C. ferrugineovittafus. C. flavicingula. C. frequens, one side. C. fallax, one side. C. hracliialis. C. lohiferus. C. vigroludferalis, one side. C. decorus. C. tenuicaudatus. C. crassicaudafus. C. festivus, one side. C. siibcequalis, one side. C. palliatus. Fig. 1. Fig. 2 Fig. 3. Fig. 4. Fig. 5. Fig. 6. Fig. 7. Fig. 8. Fig. 9. Fig. 10. Fig. 11. Fig. 12. Fig. 13. Fig. 14. Fig. 15. Fig. 16. Plate XXXIII \ '^' UH:'^^ ^ ^ f X 'ih \ x^ "^ A yr 1 ///t "^ /■J V Plate XXXIY Ilypopygia of CMronomus spp. Fig. 1. C. illinoensis, one side. Fig. 2. C. nigrovittatus, one side. Fig. 3. C nigricans, inferior process. Fig. 4. C. pdllidus, one side. Fig. 5. C. ohscuratus, one side. Fig. 6. C. indistinct us, superior process. Fig. 7. C. indistinctus, inferior process. Fig. 8. C. modestus, one side, a, inferior process. Fig. 9. C. ahortiims, one side. Fig. 10. C. fuscicornis, one side. Fig. 11. C. dimor2)lius, one side. Fig. 12. C. di^norpluis, sni)erior process. Fig. 13. C. crassicdudatus, lateral view. Fig. 14. C. ftavus, one side. Fig. 15. C. Jinlteralis, one side. Fig. 16. C. fidvus, one side. Fig. 17. C. p//OH0.s-«.s, apical portion of lateral arm. Fig. 18. C. (dihrcvidtus, one side and sn]H'rior ])rocess. l^ATK XXX IV IS JC ■f7 IB Fig. 1. Fig. 2. Fig. 3. Fig. 4. Fig. 5. Fig. 6. Fig. 7. Fig. 8. Fig. 9. Fig. 10, Plate XXXV Wings of Chironomhue Diamesa ivaltlii. CMroyiomus hracliialis. C. needliami. C. perpulclicr. C. pidcJiripennis. C. tceniape7i7iis. C. varipennis. Chdsmafonotus hijuaculatio Camptodadius hiissinns. Cory none lira similis. Plate XXXV iO j:sm.m^H f* Plate XXXVI Htjpopiigid of Chiroitomina' Fig. 1. Cluro}K)))tus fuscivcnfris, one side. Fig. 2. Tanytarsu.s nigi-ijiilus. Fig. 3. Cliironomus griseus, one side. Fig. 4. C. claripennis, one side. Fig. 5. Tunyfarsus confusus, one side. Fig. 6. Tdnytarsus dives, one side. Fig. 7. Clidsmafonofus himdcuhitus, lateral view of apical portion of lateral arm. Fig. 8. TdUjifarsiis viridivcntris, one side. Fig. 9. Tduytdrsus ohediens. Fig. 10. Chdsmatonotus himdcuhitus, one side. Plate XXXVI /o Plate XXXVII IIlipopU!)i(il (tnd Abdominal Bctdlh of Cliironommn' Fig. 1. Cricotopus hicixctus, hyiiopygiiuii. one side. Fig. 2. Cricotopm trifasciatus, hypopygium. apical ])oi'tion of lat- eral arm. Fig. 3. Ortlwcladius mgritus, hypopygium, one side. Fig. 4. Cricotopus flavihasis, hypopygium. one side. Fig. 5. Tricliochulius , 190:?, \>. "10. 346 gins of dorsal segments except the apical 3 with numerous short setulse which are irregularly arranged ; ventral segments with similar setulse, which are arranged in distinct transverse series which extend well on to the disc of the segments; antepenultimate segment with a large transverse patch of these setulae on disc (PI. LXXXIII, Fig. 16). Pupariiim (PI. LXXXIV, Fig. 13). — Length, 4 mm. Yellowish brown. Anterior respiratory organs absent. Segments with similar armature to that of larva. Apical segment armed with 2 sharp proc- esses which pierce the outer membrane of the leaf in which the puparium is enclosed, and connected with these processes, which are evidently the posterior spiracles, are 2 tracheae which run forward and presumably connect with the pupal envelope, although the point of connection is not discernible in the specimen before me. The above description w^as drawn from specimens obtained by Mr. Hart and the writer at Grand Tower in April, 19 14. The larvae were mining the leaves of a species of Panicum growing in a small stream, many of the mines being below the water level. Two specimens of a hymenopterous parasite were reared, both males. One specimen was submitted to Mr. A. B. Gahan, who identi- fied it as Gyrocampa, n. sp. He considered it inadvisable to describe a new species from the male only. Scapularis is generally distributed throughout the state. There is a previous record of the larva mining leaves of Hordeum by Webster and Parks.* Several European species of the genus have been record- ed as phytophagous, but so far this is the only North American species on record. DROSOPHILID^ The imagines of many species of Drosophila are numerous throughout Illinois during the greater portion of the year, and may be seen in large numbers on the inside of windows of fruit-stores and delicatessen stores, as well as in cafes and restaurants, where they are readily detected, flying over various foods, by their slow and steady flight. The principal food of the larvae consists of decaying vegetable matter, exuding sap on trees, and fungi. A few species are found mining leaves of cruciferous plants, and several attack injured fruit. I am unable to indicate characters for distinguishing the larvae of the family from allied acalypterates because of the paucity of my ma- terial. The larvae vary very considerably within the genus Drosophila as at present limited, and the puparia vary even more in structure; in fact there is more difference between the pupae of certain species of *Jonr. Agr. Research, Vol. 1, 1913, p. 84. 347 DrosopJiila than there is hctwccn the piipsc of different genera in some other famihes. One species that T have reared has a larva that is capable of jump- ing much as do the larvai of most Cccidoniyida. One specimen cov- ered a distance of over 5 inches at a single leap. I expect to deal with this and other species of the familv in a subsequent paper. Drosophila (Scaptomyza) adusta Loew DrosopJiila adusta Loew, Berl. Ent. Zeitschr., 1862, p. 231. Pupariuni (PI. LXXXIV, Fig. i). — Length, 1.5 mm. Reddish brown. Cephalic extremity with two long tapering respiratory proc- esses, the trachea of which may be seen traversing the area of the sunken or flattened portion of puparium. Ventral surfaces of abdom- inal segments with numerous very minute setula?, arranged in rather irregular transverse series. Caudal projections whitish, rounded apically and with weak apical hairs. Dorsal surface of abdominal seg- ments armed with setulse similar to those of ventral surface. The specimen from which the foregoing description was drawn, was obtained from sap exuding from a mulberry tree at Urbana, 111., July 3, 19 1 5. It was unrecognized in the larval stage, but the pupa was readily separated from the other species before the adult emerged. Chittenden has recorded this species, as Scaptomyza adusta, min- ing leaves of cabbage, etc.*. The habits of the species of this group (Scaptomyza) are but im- perfectly known, but it seems strange that the same species should be in the larval stage both a leaf-miner and a frequenter of sap of the nature in which I found it. I have seen a very large series of Scap- tomyza, reared by Mr. A. B. Gahan, at College Park, Md., from cru- ciferous plants, cabbage and turnip, which led me to conclude when I examined them that the species flaTCola and grainimim were synony- mous, the series presenting all gradations of thoracic coloration from unicolorous ferruginous to ferruginous with a brow^n central vitta, and from unicolorous grayish to gray with a dark brown central vitta. It is also worthy of note that in the specimens with unicolorous thorax the setulose discal hairs were arranged rather regularly over the entire surface, whereas in those with the vittate thorax the setulse were arranged in a single longitudinal series along the margins of the cen- tral vitta, and the area beyond these was almost or entirely devoid of setulse. To arrive at a definite decision as to the distinctness of the forms it would be requisite to rear a series from the eggs. *Bull. 33, n. s., Div. Ent. Dept. Agr., 1902, p. 76. 348 Drosophila dimidiata Loew Drosophila dimidiata Loew, Berl. Ent. Zeitschr., 1862, p. 230. Piiparium. — Leni^th, 2 mm. Pale reddish yellow, slightly shining. General habitus similar to that of Drosophila adiista. Anterior respira- tory organs about three times as long as their diameter, terminating in numerous fine hairs (PI. LXXXIV, Fig. 5). Surface of abdomen with the usual transverse bands of short setulse ; apex of abdomen with a scalelike projection as shown in Figures 6 and 7, Plate LXXXIV; above the base of the apical pair of respiratory processes is a pair of small tubercles; cephalad of the scalelike process the surface of the ab- domen is broken by 2 or 3 narrow but deep depressions. The exuvia from which the above description was drawn are those of adults reared from larv?e obtained by Mr. Hart and the writer at Havana, 111., November 16, 191 3. The larvaj were found feeding in fungus on the trunk of a fallen decaying tree on the bank of the Illi- nois River. The imagines emerged November 21, 191 3. This species was originally described from imagines obtained in Illinois by Le Baron. Aldrich in his "Catalogue of North American Diptera", 1905, gives only the original locality. It is one of the com- monest species at Urbana, occurring on windows in the Natural His- tory Building, and on fungi on the campus of the University during the summer. Professor Aldrich informs me that he has taken the species at Lafayette, Ind. AGROMYZID^ The larval habits of the species contained in the genus Agromyi^a are similar in that all those known are phytophagous, but they differ in the point of attack which they select, some mining in leaves, and others in the roots or in the stem. All so far reported are internal feeders, and several are of economic importance, two of the latter class recently discovered being Agromyza pruinosa Coquillett — mining the cambium layer of birch — and A. pruni Grossenbacher, mining the cam- bium of Primus. The last-named species I describe in the present paper. It has not been taken in this state, but almost certainly occurs here. As the original description is very brief and not readily acces- sible to entomologists I take the opportunity of re-describing it from material kindly supplied me by Mr. Grossenbacher, who reared the species. There are a large number of very closely allied species in the genus Agromyza, and much careful work upon the early stages and food habits is necessary before we shall be able to decide just how many dis- 349 tinct species we have in North America. In this branch of the work there is a splendid opening for original and valuable investigation. Agromyza pruni Grossenbacher Agromyza pruni Grossenbacher, Bull. Torrey Bot. Club, Vol. 42, 1915, p. 235. Larva, full-grown (PI. LXXXIV, Fig. 8). — Length, 11-13 mm. White, semitransparent, mouth hooks black. Prothoracic segment longer than succeeding one, head parts retracted within prothorax ( PI. LXXXIV, Fig. 9), prothoracic respiratory organs indistinguishable except in one larva which had evidently been near the point of pupat- ing. First abdominal segment longer than the two preceding thoracic segments together and shorter than second abdominal ; segments 2 to 5 subequal in length ; 6 shorter than 5 ; 7 and 8 together about equal to 6 ; integument of thoracic segments with numerous microscopic puncti- form marks which are only visible under a very high magnification; abdominal segments with microscopic setulse at the incisions, on their anterior margins, those on segments i to 5 consisting of one or two series which, like those of the apical segments, do not extend entirely round the body ; segment 6 with 3 or 4 series, segment 7 with 6 or 7, apical segment with 8-9; anal respiratory organs rather conspicuous, ending in 3 short branches. Piiparmm (PI. LXXXIV, Fig. 10). — Length, 5 mm. Testaceous, slightly shining. Anterior respiratory organs very small. Abdominal segmentation not deep ; segments with weak transverse rugse ; anal ven- tral orifice marked by a black spot ; anal respiratory organs small, but slightly protruded. Imago: male and female. — Black. Head black, anterior portion of frons, the antennae, and palpi brown. Legs black, fore tibiae and tarsi and apices of mid and hind tarsi yellowish (alcoholic specimens). Frons over one third the head-width; orbits differentiated, each about one fourth the width of center stripe ; 5 pairs of orbital bristles present, their length decreasing anteriorly; antennae of moderate size, third joint rounded apically, pilosity short, arista slender, almost bare, the entire length about equal to that of frons ; face concave ; cheek nar- row, about one sixth as high as eye, marginal bristles of moderate strength, not numerous, vibrissa well differentiated ; eye nearly twice as high as long; palpi of moderate size. Mesonotum with 4 pairs of dorso-central bristles, the two anterior pairs reduced in size, the fore- most pair well in front of suture ; the pair of bristles between the pos- terior pair of dorso-centrals half as long as the latter; disc with numer- ous short setulae. Abdomen stout ; male hypopygium small, very much 350 like that of parvicornis; female ovipositor very conspicuous, as long as preceding segment of abdomen, of almost equal diameter throughout its length; surface with short hairs (PI. LXXXIV, Fig. ii). Legs of moderate strength; mid-tibial bristles small. Wings of moderate width ; costa to slightly beyond apex of third vein ; inner cross-vein be- low end of first vein; outer cross-vein less than its own length from inner, slightly bent, its upper extremity nearer apex of wing than its lower; last section of fourth vein about lO times as long as preceding section; last section of fifth about lY^ times as long as preceding sec- tion. Length, 3.5-4 mm. The life history of this species has been dealt with by its describer in the bulletin cited under the species name in the present paper, it being an elaboration of his report upon the same species in a previous paper.* The three species of Agromysa known to cause medullary spots in wood of trees are carbonaria Zetterstedt, a European species; pruinosa Cocjuillett, occurring in the cambium of river birch; and the present species, found in the cambium of Primus avium and domestica. In Grossenbacher's first paper above cited he states that Cratccgus is also attacked, while Salix is not. In his last paper he makes mention only of the species of Prumis, and gives his agromyzid a name that leads me to infer that he considers it as a Prunus-in testing species exclusively. I have recorded Agromyza pruinosa from Illinoisf, and it is very probable that A. pruiii occurs in suitable localities. Up to the present I have been unable to devote time to a search for the species. I have drawn the larva and puparium of Agromysa parvicornis Loew (PI. LXXXIV, Figs. 14 and 15) to show the normal reduction in size due to the induration of the larval skin in pupation in Agromysa. The imago of pruni will run down to section 16 in my key to the North American species of this genus| if the frons is considered as partlv reddish, the cross veins being close together. It is readily sepa- rated from both of the species in that section by its robust build and the possession of 4 pairs of dorso-central bristles. The species has much the same appearance as pruinosa, but differs in venation, etc., while the food plant and larval and pupal characters are quite enough to separate them specifically. The difference in venation will separate it from aprilina. ^Medullary spots : a contribution to the life history of some cambium miners. Tech. Bull. 15, N. Y. Agr. Exper, Sta., pp. 47-65. 1910.* tCan. Ent., Vol. 47, 1915, p. 15. tAnn. Ent. Soc. Amer., Vol. 6, 1913, p. 271. 351 Agromyza tiu^'E Coiiden Agromysa tilia; Couden, Proc. Ent. Soc. Wash., Vol. 9, 1908, j). 34. Piipariiiui. — Length, 2.5 mm. Yellowish white, shining. Seg- ments poorly defined but distinguisha])le; surface without hairs or pro- tuberance except the anterior and anal respiratory organs. Anterior respiratory organs of moderate length (PI. LXXXIV, Fig. 18), located on dorsum of first segment, separated from each other by less distance than the length of one of the organs. Anal respiratory organs shorter and comparatively stouter than anterior pair (PI. LXXXIV, Fig. 19) ; anal orifice distinct, a few fine irregular reticulated lines on dorsum cephalad of the orifice. The puparium from which the above description is drawn is one of a lot collected by J. J. Davis at Chicago October 6, 1908, the imagines emerging May 24, 1909. The species makes galls on twigs of linden trees. Besides these specimens there are several in the collection here which were reared by Marten several years ago at Urbana. The galls, "at base of leaf petioles of basswood", were obtained September 27, 1 89 1, and the imagines emerged May 2, 1892. Originally figured and described from Missouri, and recorded as making galls on linden. I subsequently recorded the species from Veitch, Va., and doubtfully from Delaware County, Pa.* Agromyza angui^ata Loew Agromysa angulatu Loew, Berl. Ent. Zeitschr., 18G9, p. 47. Larva. — Length, 1.75 mm. Pale greenish or whitish. Segments laterally conspicuously swollen, the incisions between them deep, so that viewed from above the whole larva presents a somewhat monili- form appearance ; viewed from the side the larva is not so thick as across the dorsum and the segments present a more even surface with little indication of swellings or constrictions. Mouth parts black and of moderate size ; armature consisting of 4 hooks, one at apex, a trans- verse pair slightly caudad of it, followed by another one at the lower posterior angle of the anterior face. Prothoracic respiratory organs very small and inconspicuous (PI. LXXXIV, Fig. 2). Segments throughout with microscopic wartlike processes, which are rather widely separated on the surfaces of the swollen portions ; apex of abdo- men as in Figure 3, Plate LXXXIV. Puparium (PI. LXXXIV, Fig. 12). — Length, 1.25 mm. Glossy black, with purple or violaceous reflections, especially in the depres- *Aiin. Ent. See. Anier., Vol. 6, 1913, p. 327 852 sions and on the posterior 3 segments. Surface with similar processes to those of the larva, but almost indistinguishable because of the ground-color. Prothoracic respiratory organs very small. Depressions on body very deep, those on dorsum very conspicuous, slightly cres- centic in shape. Apex of abdomen similar to that of larva except that in hardening the projecting portions are contracted considerably and are less clearly distinguishable. Reared from leaves of Setaria glaiica, the larvae occurring in the apical 6 inches of the leaf, usually 4 or more in each mine. In com- pany with another species augiilata was found to be present on vacant lots both in Urbana and Champaign in July and August, 191 5, their work showing up readily because of the conspicuous whitening of the tips of the affected leaves. Angnlata has previously been recorded as attacking timothy grass*, and it will also feed on wheat. A summary of investigations of the habits and life history of this species, with figures of the imago and puparium, are given by Webster and Parks. f Descriptions of New Illinois Diptera In the course of the year it freciuently happens that specimens are taken in general collections, or in connection with other work, which belong to undescribed species. Often these species are of economic importance, and usually they are small forms which are readily over- looked in the field. It is considered necessary in the interests of students of the represented order to place the occurrence of such species upon record ; to give adequate descriptions of them ; and to indicate their relationships with already described species. Isolated descriptions of new species unless very full are often useless for the purpose of identification because of their inadequate nature or the omission of the essential characters by means of which the species of the genus are separated. Many species have been described by writers who were unacc|uainted with congeneric species, and because of this ignorance they either did not compare their so-called new species with those already described, or they compared it with some species to which it bore but a faint resemblance. The present writer in all cases compares the new species he describes with the forms most closely related, not because he presumes to set an example but because he considers it his duty to do so. *Malloch.- — A Revision of the species in Agromyza Fallen, and Cerodontha Eon- dani, Ann. Ent. See. Amer., Vol. 6, No. 3, 1913, p. 304. tThe Serpentine Leaf-minor, Jour. Agr. Eesearch, Vol. 1, No. 1, Oct. 10, 1913, pp. 83-84. 353 PHORID^ Platyphora flavofemorata, n. sp. Ma7^._Black. Head black, f rons highly polished ; antenricnc ful- vous, third joint brown at apex, arista black; palpi fulvous. Thorax glossv black, upper portion of pleur3e, especially posteriorly, brownish; scutcilum dull black, the surface shagreened. Abdomen black, dis- tinctly shining throughout, surface with very faint indications of pru- inescence. Legs yellow, mid and hind cox^e infuscated at bases; all tibic-e infuscated, the depth of the infuscation increasing from near base to apices ; tarsi fuscous. Wings clear, thick veins fuscous. Halteres yellow, apices of stems and the knobs black. Frons about 1.5 as wide as its length at center, the length slightly less at eye margin than at center, surface with numerous short decum- bent hairs, those at vertex slightly longer than those on disc ; distance between the posterior ocelli about twice that between either of these and the median one ; basal antennal joint rather elongate ; third joint about 1.5 as long as broad, rounded at apex; arista subapical, bare, very slender, basal joint very short, slightly swollen; cheeks with 4-5 f orwardly and slightly downwardly directed bristles ; palpi very small, armed with several stout apical setulse. Mesonotum broader than long, disc with short hairs and without dorso-central macrochsetse, scutellum about twice as broad as its length at center, margin with a number of decumbent setulose hairs which lie along the edge and give it the ap- pearance of having a rim ; disc distinctly shagreened. Abdomen with second segment longer than either of the 3 following segments, 6th longer than 4+5, its lateral surfaces with short hairs ; surfaces of ab- dominal segments minutely shagreened ; hypopygium small, surface of dorsal plate shagreened. Legs stout ; fore coxse stout, over two thirds as long as fore femora, their anterior surfaces with setulose hairs which become longer and stronger towards apices of coxse ; fore tibia about two thirds as long as femur, and distinctly longer than basal joint of tarsi (17:10); fore tarsi dilated, especially the basal joint, which is distinctly wider at apex than is the tibia; second tarsal joint appreciably longer than third ; mid tibice with 2-3 apical setula; , hind tibia; with short decumbent setulse on ventral surfaces, so arranged that they appear like irregular longitudinal rugae; apices with 2-3 short setulai and one longer bristle ; mid and hind tarsi slender, basal joint of each with a few short downwardly directed setula} on ventral sur- faces. Costa extending to middle of wing; third vein swollen, thicker than costal vein excepting apical part of latter, setulose throughout ; second vein distinct, setulose; first vein swollen at apex, extending be- 354 yond base of second ; costal setulae about ecfual to diameter of costal vein ; veins 4 and 5 very distinctly divergent at apices ; greatest dis- tance from vein 7 to margin of wing eciual to greatest distance from vein 4 to margin. Female. — Reddish yellow. Eyes black; frons with a slight pearl- aceous iridescence, antennse and palpi concolorous with head. Thorax similar in color to upper part of head. Abdomen dorsally darker than thorax, becoming dark brown or fuscous at apex, the iridescence very distinct, especially at base ; ventral surface opaque black except at ex- treme base. Legs reddish yellow, the short setulose hairs on tibi?e and tarsi giving them a slight fuscous color. Ocelli indistinguishable ; width of frons less than twice its length at center, anterior outline convex; eyes very small, each about one tenth the width of frons seen from above ; surface of frons with sparse microscopic hairs; antennae smaller than in the male, shape similar; arista with very slight pale pubescence; palpi almost as large as third antennal joint, with apical setulse as in male; cheek with 2 distinct groups of setulse, one extending from middle to eye margin and con- sisting of 3 strong setulae and several weak hairs, the other located on mouth margin and consisting of 3 strong setulse. Mesothorax slightly over 1.5 as broad as long; disc with very weak setulse, lateral margins more strongly setulose ; posterior outline slightly emarginate ; appearance of dorsum as in Figure 17, Plate LXXXIV. Abdomen with 6 distinct segments, undifferentiated from thorax except by the transverse suture, its dorsal level and lateral margins similar to those of thorax ; fourth segment slightly elongated, its posterior margin broadly and slightly concave ; surfaces of all segments with weak set- ulae. Legs rather short and stout ; fore tarsi short and distinctly dilat- ed, basal joint as long as next two together and less than half as long as tibia; armature of legs as in male except that the mid tibiae have a long apical spur. Wings and halteres absent. Length: male, 1.7 mm.; female, i him. Type locality. White Heath, 111., August 22, 191 5 — a pair taken in copula on a sandy bank along the Illinois Central Railroad between White Heath and the Sangamon River by the writer. The male of this species bears a strong resemblance to coloradeiisis Brues*, differing noticeably however in wing venation, which in flavo- femorata is similar to that of ettrynota, which Brues described at the same time. In separating the males of the three North American species the following key will be found useful. *Psyche, Vol. 21, 1914, p. 79. 355 1. Veins 4 and 5 almost parallel apically color adensis. — Veins 4 and 5 very distinctly divergent apically 2 2. hogH and antenna' black; scutelluiu {)()lish('d ; ])asal joint of fore tarsi almost as long as fore tibia' eurynota. — Legs and antenna' yellowish, more or less inf uscated apically ; scutel- lum subopaque, shagreened, basal joint of fore tarsi not two thirds as long as fore tibia? flavofemorata. The genus Platyphora was described by Verrall in 1877 with the genotype luhhocki Verrall, a myrmecophilons species found in Britain*. Nothing w^as known of the female of the species for a number of years. In 1890 Meinert described the genus Alnigmatias^ with the genotype hlattoides Meinert. Mik suggested in 1898 J that Mnig- matias was the female of Platyphora. The most definite statement concerning the relations of the genera is that published by Donis- thrope.§ In this paper it is stated definitely that the genera are synony- mous, Platyphora being simply the wanged male and Mnigmatias the apterous female of the same genus. This decision w-as arrived at from data obtained in connection with observations made on ants' nests in which the species of Platyphora occur. I am not aw^are of any copulat- ing record having been made prior to that in the present paper, the de- cision as to the specific identity of the European species resting upon the fact that only males of Platyphora and only females of /Hnig- matias were obtainable, and that both occurred in the immature stages in the same nests. The record now published confirms the previous one by Donisthorpe, if such confirmation were required. Coquillett described as a male a female discovered in Arizona. || This species, schwarai Coquillett, is very similar to flavofemorata, and a comparison of the foregoing description wnth Coquillett's type will be necessary to discover specific differences, although his description seems to indicate that the two are distinct. It is pertinent to indicate here that the females of neither of the species described by Brues are known. In the case of flavofemorata the species was found on a sandy bank where there were numerous ants' nests. The male was running about fairly rapidly, and it was only after I had inverted a cyanide bottle over it that I discovered the attached female. The latter was carried apparently curled forward under the abdomen of the male and was *Joiir. Linn. Soc. Lond., ZooL, Vol. 13, 1877, p. 259. tEntom. Meddel., Vol. 2, 1890, p. 213. iWien Ent. Zeit., Vol. 17, 1898, p. 204. §Ent. Eec, Vol. 26, 1914, p. 27(i. ||Can. Ent., Vol. 35, 1903, p. 21. 856 quite invisible from above on account of the rather large wings of the male, which were folded closely over the abdomen. It is quite possible that it is by this means that the females find their way from one nest to another, as they are themselves not well adapted to do so. Coquillett's species is recorded as occurring in a situation where no ants' nests were within easy reach. ANTHOMYID^ POGONOMYIA FLAVINERVIS, n. sp. Male. — Glossy black. Frontal and facial orbits slightly brownish, covered with dense silvery pilosity. Thorax with slight, but distinct, grayish pruinescence. which when viewed from in front gives the disc the appearance of being trivittate anteriorly. Abdomen when viewed from behind distinctly gray pruinescent on sides, leaving only a rather narrow dorso-central black line which is more or less interrupted at apex of each segment. Legs black. Wings slightly tinged with yellow, all veins yellow, costa with black setulose hairs. Calyptrae whitish, margins yellowish. Halteres brown, knobs dark brown. Eyes distinctly separated, orbits each about as wide as central stripe at narrowest part of frons; frons at narrowest part as wide as distance between outer margins of the posterior ocelli ; the strong pair of ver- tical macrochastse much more conspicuous than the postocular bristles ; arista short-haired ; head otherwise similar to that of alpicola. Thorax with the macrochsetse and hairs as in alpicola but much weaker. Abdo- men rather narrow and distinctly tapering apically, the macroch^eta? and hairs much less conspicuous than in alpicola. Legs with the arma- ture much as in alpicola; mid femora with the antero-ventral surface armed with a series of 8-9 bristles, which begins before middle and ex- tends to apex, the longest bristle being slightly beyond the middle of the series; postero-ventral surface with a series of 8-9 longer and more hairlike bristles extending from base to a point about one third from apex, the bristles increasing in length from base to apex of series ; hind femora with the series of bristles on antero-ventral surfaces much less numerous than in alpicola; postero-ventral surface with a single long slender bristle about one third from apex (two smaller and weak- er ones in alpicola^ ; hind tibiae with armature like that of alpicola ex- cept that the bristles are distinctly weaker. Wing venation similar to that of alpicola. Female. — Agrees in color with the male except that the abdomen is almost entirely glossy black. 357 Eyes separated bv slightly less than one third the head-width, orbits each about half as wide as central stripe at its narrowest point ; decus- sate frontal bristles slender. Abdomen much broader than in male. Legs stouter than in male ; mid femora with a stout bristle about one fourth from base on the antero-ventral surface which is appreciably shorter than the diameter of the femur (in dpi cola this bristle is more slender and much longer than the diameter of the femur). Third and fourth wing-veins slightly convergent apically. Length, 5.5-7 mm. Type locahty, Algonquin (Nason). The type series consists of one male and three females, two bear- ing Algonquin labels (one with the date May 24, 1895), and two laJDcled N. 111., one of the latter also bearing Stein's hxhd "Pogono- myia n. sp.", and presumably the species referred to by him in Berliner Entomologische Zeitschrift*. Subsequently Stein referred to the species a specimen from Wisconsin, but as he had only seen females he did not describe the species. The foregoing description should serve to separate alpicola Ron- dani, and flavinervis. I have not seen aterrima Van der Wulp, which was described from Mexico, but it must be very similar to alpicola if not identical with it. I have both sexes of alpicola from Moscow, Idaho, May 22, 191 3 (J. M. Aldrich). GEOMYZID^ Aphaniosoma ouadrivittatum, n. sp. Female. — Opaque yellow. Head yellow with the exception of a small spot surrounding the ocelli and a small area round the connection l)etween the head and thorax, which are black ; eyes iridescent green in life. Mesonotum with four blackish gray vittse, the center pair in- distinctly connected with a similarly colored spot on center of anterior margin at connection of head and thorax, lateral pair discontinued at humeri, posteriorly all four vittae being discontinued slightly beyond middle of disc, the lateral pair slightly exceeding the median pair in length; lower portion of sternopleura slightly darkened; postnotum blackened on low^er half. Abdomen pale yellow, each segment with a conspicuous blackish brown cross-band on basal portion which is broad on median line and narrows towards each lateral margin. Legs yellow. Wings clear, veins yellow. Halteres yellow. Bristles on head and thorax black, surface hairs yellow. *V^ol. 42, 1897, p. 170. 358 Head slightly higher than long; face concave in center; upper half of back of head concave; post-vertical bristles very weak, cruciate; frons in profile slightly buccate, viewed from above nearly one half the width of head, slightly narrowed anteriorly; orbit not differen- tiated from center stripe; two distinct orbital bristles present on each side which are slightly reclinate and of moderate size ; anterior to the lower one is a short setula; ocellar bristles forwardly directed, diverg- ent ; surface of center stripe with numerous short setulose hairs ; an- tennae rather small, third joint rounded, arista almost as long as frons, bare; cheeks with numerous rather distinct hairs and 2-3 stronger bristles along mouth margin anteriorly; cheek at middle half as high as eye, the latter slightly longer than high. Mesonotum with 2 pairs of widely separated dorso-central bristles, the anterior pair much weaker than the posterior and preceded by a closely placed series of short setulae which extend along the inner margin of the lateral vittse almost to anterior margin of disc ; acrostichals two-rowed anteriorly, irregularly four-rowed poste'riorly ; no bristles between posterior dorso-centrals ; scutellum slightly flattened on disc, 4 subequal mar- ginal bristles present, the posterior pair located on margin very close to base. Abdomen slightly elongated, pointed at apex. Legs rather slender ; tibiae without preapical bristle. Wings narrow, auxiliary vein complete but indistinct ; costa unbroken, first division one fifth as long as second ; second vein distinctly arcuate, the cell between it and third vein conspicuously narrowed apically; inner cross-vein about as far beyond apex of first as it is in front of outer cross-vein; outer cross- vein short, not much longer than inner; last section of fourth vein four times as long as penultimate; last section of fifth, one and a half times as long as penultimate. Length, 2 mm. Type locality, Urbana, 111., June 19 to July 9, 191 5 ; on window in Natural History Building, University of Illinois (J. R. Malloch). The range of variation in color in this species includes forms in which the back of the head is entirely gray, and the dorsum of thorax and abdomen almost entirely blackish gray. The genus Apliaiuosoma was described by Becker in 1903*, who distinguished it from Chyromyia by the concave occiput, the latter genus having the occiput convex. The characters of the two genera are very similar, but the shape of the head should readily separate them. The Egyptian species, approximatu'in Becker, differs from the above species in having the disc of the mesonotum opaque gray dusted and the pleura; with gray spots. It is also considerably smaller — •5-75 y^m- *Aegyptische Dipteren. Mitt. Zool. Mus. Berlin, II Bd., 3 Hft. 359 AGROMYZID^ Agromyza aprii^ina, n. sp. Female.— G\ossy black. Frons opaque black, orbits and ocellar triangle glossy ; lunula yellowish ; face and cheeks opaque, slightly dusted with grayish pruinescence ; antennae, palpi, and proboscis black. Thorax highly polished without trace of pruinescencci ; scutellum as disc of mesonotum. Abdomen as thorax, with a slight metallic blue sheen towards apex. Legs entirely black. Squamae and fringes whit- ish. Halteres yellow, knobs white. Head in profile as in Figure 4, Plate LXXXIV, frons over one third the head-width, parallel-sided, orbits narrow, each about one fifth as wide as center stripe, five moderately strong orbital bristles present, which decrease slightly in strength towards anterior margin, orbits otherwise bare; frontal triangle distinct, rather broad and short, not extending midway to anterior margin; antennae of average size, third joint distinctly, but not greatly, longer than broad; arista swollen at base, bare, its length exceeding that of anterior width of frons by about one fourth ; face and cheeks as shown in figure of profile. Mesonotum with 4 pairs of dorso-central bristles, which decrease in size anteriorly, the foremost pair being but little stronger than the strong discal hairs of which there are about 6 irregular rows between the anterior dorso- centrals ; the pair of bristles between the posterior pair of dorso-cen- trals distinct. Abdomen elongate, discal hairs numerous and rather strong; ovipositor stout and of moderate length. Legs normal in length and in form; mid tibiae with the posterior pair of bristles distinct. Costa extending slightly beyond third vein ; outer cross-vein slightly beyond middle of wing and a little more than its own length from inner; inner cross-vein beyond end of first vein and two fifths from apex of discal cell ; last section of fourth vein four times as long as penultimate section ; last section of fifth five sixths as long as penul- timate; auxiliary vein complete; sixth vein extending nearly to wing margin. Male. — Agrees with the female in color. Differs from the female in the case of one specimen in having the outer cross-vein at one seventh of the distance from inner cross-vein to wing margin. Length: female, 3-3.5 mm.; male, 2.5 mm. Type locality, Cottonwood grove, Urbana, 111., April 16-20, 191 5 (T. R. Mallochj. In the key to the species of Agromyza in my paper m the Annals of the Entomological Society of America this species will run down 360 to caption 15. Including submgripes (=nigripes Schiner nee Meigen) there are four species occurring in North America that fall here; they may be separated thus : a. Squamae gray, fringes brown suhnigripes Malloeh. — Squamge and fringes whitish aa aa. Cross veins separated by about the length of outer cross-vein aprilina, n. sp. — Cross veins separated b}^ about twice the length of outer cross- vein aaa aaa. Arista almost bare ; occiput not projecting on upper half ohhreviata Malloeh. — Arista distinctly pubescent ; occiput projecting on upper half kincaidi Malloeh. CHLOROPID^ Gaurax Loew I recently described two new species of the genus Gaiirox and pub- lished a synoptic key to the North American species*. Since sending that paper in for publication I have found three species which are evi- dently undescribed, and in presenting descriptions of these I feel that it becomes necessary to publish an enlarged synopsis of the species so that students may the more readily recognize the new forms. I have not found any of the early stages of the species; most of the imagines occurring on tree-trunks and limbs. Several examples of dorsalis Loew were taken on windows of the basement in the Natural History Building of the University of Illinois. In the case of the specimens of montanns Coquillett which I took here the apices of the hind femora are slightly brownish, a character possessed by the type also, though omitted in the original description. Key to Species. 1. Wings not entirely hyaline, either with a black spot at apex of sec- ond vein, or with a distinct dark mark or inf uscation on disc .... 2 — Wings entirely hyaline 7 2. Wings with a small black spot at apex of second vein (Toronto, Can.) pseudostigma Johnson. — Wings with a much greater portion blackened 3 3. Thorax and scutellum entirely yellow ; a large black mark occupying the area of the wings from middle of second vein between costa and third vein and a small portion of the apex of the cell posterior to third (111.) flavididus, n. sp. *Proc. Ent. Soc. Wat^h., Vol. 17, 1915, p. 159. 361 — Thorax with at least black discal marks ; wings marked otherwise than as above 4 4. Thorax and scutcllum black 5 — Ground color of thorax yellow, disc with black marks, scutellum yellow 6 5. Setulose hairs on frons and cheeks black; wings with very distinct infuscation, which extends to base and is most distinct in cell bounded by first vein and costa; legs entirely yellow (111.) pallklipes, n. sp. — Setulose hairs on frons and cheeks yellow; wings with rather indis- tinct infuscation, which does not extend to base ; legs yellow, hind femora and tibiae largely black (111.) fumii:>ennis Malloch. 6. Sides of mesonotum near anterior angles with a white spot (111.) . . . splendidus Malloch. — Sides of mesonotum without a white spot (Mass.) ohscuripennis Johnson. 7. Thorax and scutellum glossy black ; apical half of hind femora black, the remainder of legs yellow (La.) 2^^^osulus Becker. — Either disc of mesonotum or the scutellum yellow ; legs not as above 8 8. Halteres yellow 9 — Halteres black 11 9. Scutellum black, disc of mesonotum yellow, with a posteriorly tri- dentate black mark which covers almost the entire disc (Pa., 111., N. H. ) dorsalis Loew. — Scutcllum yellow, with brownish marks upon the disc 10 10. Disc of mesonotum with 3 confluent black vitts, forming a large dis- cal mark, rarely narrowly separated ; scutellum with a basal l^lack mark on each side (N. H.) epliippium Zetterstedt. — Disc of mesonotum with 3 black spots, the rudiments of the normal vittae, beyond middle ; scutellum with a large brownish mark on disc (111.) interrupins, n. sp. 11. Legs entirely yellow or with only a faint brownish mark at apices of hind femora (N. H., Vt., 111.) montanus Coquillett. — Legs with distinct, deep black marks 12 12. Thorax glossy black, lower half of pleurje and the scutellum yellow (111.) apicalifi Malloch. Thorax and scutellum yellow, disc of the former with black marks (Pa.) festivus Loew. GaURAX FIvAVIDULUS, n. sp. Male. — Yellow, subopaque. Head yellow, ocellar region, inner upper mouth-margin, and back of head black. Thorax yellow, a black central spot on pleurae and a similarly colored transverse one on mid- dle of postnotum. Abdomen yellow, infuscated on sides of first seg- 362 ment and entire dorsum of other segments; venter yellowish. Legs yellow, mid and hind tibiae with a brownish black spotlike mark on dorsal surfaces near base. Wings with a large black mark covering the entire area anterior to third vein from middle of second to apex of third and extending slightly posterior to third near its apex; veins black. Halteres yellow. Setulose hairs on head and thorax black, the weak hairs pale yellow. Frons over one third the head-width, triangle poorly defined ; an- tennae small, third joint rounded apically, slightly pilose; arista short- haired; cheek linear; eyes sparsely haired. Surface of mesonotum with weak hairs; apical pair of scutellar bristles distinctly stronger than basal. Abdomen rather slender; hypopygium of moderate size, recurved. Legs normal. Third costal division of wing about three fourths as long as second ; veins 3 and 4 parallel, the latter ending in wing tip. Length, I mm. Type locality, Urbana, 111., July 4, 191 5, at rest on cypress limb (J. R. Malloch). Differs from any described species of the genus in the wing mark- ings. Gaurax pallidipe:s, n. sp. Male. — Black, shining. Head yellowish brown; frons opaque black-brown, triangle glossy black ; antennae brownish ; arista fuscous ; palpi dusky yellow ; back of head black. Thorax and abdomen shining black, the latter slightly yellowish at base. Legs entirely yellow. Wings with a very distinct infuscation on anterior basal half, which fades out before apex of third vein; veins black. Halteres yellow, knob black. Hairs and bristles on head black; bristles on thorax yel- low ; hairs on thorax and abdomen white. Head short and broad ; frons one half the width of head, triangle well defined and very large, filling almost the entire frons ; lateral and vertical setulae strong; antennae large, third joint very hairy; arista slender, short-haired; marginal hairs on cheek strong; eyes very dis- tinctly haired. Mesonotum rather densely covered with long white hairs ; scutellum with similar hairs and 4 marginal bristles, the apical pair strongest. Abdomen short and broad. Legs of moderate strength. Third costal division of wing two thirds as long as second ; veins 3 and 4 parallel, the latter ending in wing tip. Length, 1.5 mm. Type locality, Urbana, 111., July 4, 191 5, at rest on cypress limb (J. R. Malloch). 363 Differs from fumipennis Malloch in having the legs entirely yellow and the infnscation of the wings carried to the base. Gaurax interruptus, n. sp. Female. — Ochreous yellow, slightly shining. Head yellow, ocellar region, inner upper mouth-margin, and back of head black, arista brownish. Mesonotum with the three vittre faintly indicated anteri- orly, black on posterior third from transverse median line of disc mid- way to posterior margin ; pleurae with a large glossy black central spot and the upper margin narrowly black ; scutellum brownish black except the margin; postnotum yellow above, black below. Abdomen blac^k dorsally, segments paler on anterior margins, venter yellow. Legs yel- low. Wings hyaline, veins grayish. Halteres yellow, knobs white. Bristles on head and thorax black, hairs yellowish. Frons opaque, over one third the width of head, surface with numerous setulose hairs, those on vertex, lateral margins, and a pair on center of anterior margin strong; antennae rather small, arista short-haired ; eyes sparsely haired ; triangle poorly defined. Mesono- tum with less noticeable surface hairs than in most species of the genus; scutellum with short discal hairs and 4 marginal bristles, the apical pair strong. Abdomen and legs normal. Third costal division of wing about four fifths as long as second ; veins 3 and 4 subparallel, the latter ending in wing tip. Length, i mm. Type locality, Urbana, 111., Julv 5, 191 5, at rest on cvpress tree trunk (J. R. Malloch). This species is separable from ephippiiim by the interrupted tho- racic vittae, and the discal spot on scutellum. Url)ana, Illinois, Deceniljer 3, 1915. Plate LXXX Larval and Pupal Details of Sciara, Myceiohia, and Beromyia Fig. 1. Sciara sp., larva, ventral view of head : a, antenna ; lah, labium ; mx, maxillee ; Ih, labriim ; m, mandible. Fig. 2. The same, abdominal trachea and spiracle of larva. Fig. 3. The same, prothoracic trachea and spiracle of larva. Fig. 4. The same, latero-ventral view of pupa. Fig. 5. Mjjcetohia divergent, prothoracic spiracle of larva. Fig. 6. The same, portion of head and prothorax showing trachea and spiracle of larva. Fig. 7. Mycetohia divergens, lateral view of pupa. Fig. 8. Sciara sp., mandible of larva. Fig. 9. Mycetohiai divergens, dorsal view of apical segments of pupa. Fig. 10. Sciara sp., clypcus and hypopharynx of larva. Fig. 11. Mycetohia divergens, mandible of larva. Fig. 12. The same, dorsal view of larva. Fig. 13. The same, labial plate of larva. Fig. 14. Deromyia wintJiemi, thorns at base of wing of pupa. Fig. 15. The same, lateral view of eighth and ninth segments of abdo- men of pupa. Fig. 16. The same, side view of lateral cephalic thorns of pupa. Plate LXXX ^==xi2ziio2azoM Plate LXXXI Larval and Pupal Details of Bomhyliida', Asilidw, Tlicrevida', and CAjrUdw Fig. 1. Exoprowpa fascipennis, pupal abdominal dorsal bristles, dorsal view. Fig. 2. The same, lateral view. Fig. 3. Anthrax lateralis, pupal alidoniinal dorsal bristles, lateral view. Fig. 4. Exoprosopa fascipennis, lateral view of pupa. Fig. 5. The same, front view of head of pupa. Fig. 6. Asilus notatus, lateral view of head and thorax of pupa. Fig. 7. The same, dorsal view of pupa. Fig. 8. Anthrax lateralis, pupal abdominal dorsal l)ristles, dorsal view. Fig. 9. Psilocepliala luvmorrlioidalis, larval head, lateral view: a, an- tenna ; m , mandil)le ; pr, posterior rods. Fig. 10. The same, lateral view of larva: sp, prothoracic spiracle; 1-6, abdominal segments one to six ; a, dorsal view of apex of abdomen. Fig. 11. Psilocepliala luvmorrlioididis, ventral view of pupa. Fig. 12. The same, dorsal view. Fig. 13. The same, lateral view of apex of abdomen of pupa. Fig. 14. Asilus notatus, lateral view of apex of abdomen of pupa. Fig. 15. Psilocepliala lucmorrlwidalis, lateral view of head and thorax of pupa. Fig. 16. Antlirax lateralis, lateral view of head of pupa. Fig. 17. The same, front view of head of pupa. Fig. 18. Antlirax lujpomelas, lateral view of apical segments of abdomen of pupa. Fig. 19. Antlirax lateralis, same as above. Fig. 20. Antlirax liypomelas, lateral view of head of pupa. Fig. 21. Anthrax lateralis, dorsal view of head of pupa. Fig. 22. Anthrax liypomelas, same as above. Fig. 23. Oncodfs costal us, lateral view of al)domen of pupa. Pi.ATK TA'XXT Plate LXXXII Larval and Pupal Dcfaih of Asilida' and 3Iydoid. 184. Two examples of this species from the following localities: Takao, June 25, 1907, and Anping, Aprd. 1912. Mallochiella lacteipennis Hendel. Mudiza ludeiptnnin Hendel, ^Supj)!. Entomol. Nr. 2, 1013, p. 108. A single male agreeing with Hendel's description, Pilam, August, 1912. The description of the female only is given l:)y Hendel. The male differs in having the hind femora swollen, and the hind tibise spatulate as in halteralis Coq. The legs do not show the annulations mentioned by Hendel as present on the mid and hind tarsi, though a close examination shows the first three joints to be reddish with brown apices. It may be well to mention that this species will fall hito Desmometoixi if regard is paid to the presence of the setulse at the base of the wing, and the outcurving of the two upper pairs of orbital bristles. In other respeats, the shining frons and l)ody particularly, the species is obviously more closely related to halteralis than to M-mqmm and its allies, so that it may well be retained in MallocliieJla. Phyllomyza Fallen. The species herein described are congeneric with those placed by Melander in his genus Neofhyllomyza^ The only character which serves to distinguish the present species from the type of Phyllomyza is, that, m the latter, there are four pairs of dorso-central bristles, whereas in the spe- cies in Neoyhyllomyza there are only two. In other respects the generic characters are the same, and the species may the more readily be retained in Phyllomyza as within the limits of the group of species placed in Neo- j}hyllomyza there are characters, in the structure of the head especially, 1 Journ. N. Y. Ent. Soc. 1913. p. 243. 310 J. E. MALLOCH. ■which are in this family accepted as of generic value, though the number of dorso-central bristles is not so considered. Table of species. 1. Cruss veins closely ajipruxiniated, the penultimate section of fourth veip not half as long as last section of fifth approximata Malloch. — Cross veins not closely approximated, the penultimate section of fourth vein subequal with last section of fifth, or rather longer 2. 2. Palpi clear yellow, protruding, but not much broadened lufeipalpis n. sp. Palpi black, nmch protruding, and very distinctly broadened 3. 3. Palpi very long, equal to 1^ times the height of the head, paralell-sided, liare ; halteres black, yellowish at ])ase nndipalpis n. sp. — Palpi broad aud leafdike, tapering to the apex, not as long as height of head ; halteres yellow dilatata n. sp. Phyllomyza approximata Malloch. Phyllomyzd approximaid Malloch, Proc. U. S. Nat. Mus. vol. 4(3, 1913. p. 138. One female evidently referable to this species from Pilam, August, 1912. Originally described from the Eastern United States. Phyllomyza luteipalpis n. sp. Male: Subopaque, l)rowii-black. Frons, viewed from l)ehind, sub- shining on orbits, and on ocellar triangle, opaque on central stripe, the latter brownish, becoming yellowish anteriorly; antennae brown, the lower portions, and especially the underside of the third joint, yelUnvish ; arista brown; face opaque, brownish, cheeks concolorous ; palpi clear yellow; proboscis brown. Mesonotum and scutellum with grayish-brown polli- nosity; pleurae shining on the central portion. Abdomen brownish, sul)- o paque. Legs yellow, femora browned, except at bases and apices, mid and hind tibise slightly obscured, but without distinct brown marks. Squamae and halteres yellow. Wings clear, veins brown. Upper pair of orbital bristles reclinate, the next two pairs directed out over the eye, the two lower pairs directed inwards; central, cruciate setulse forming two weak lines ; orbits widest on just below the third pair of bristles; a few short hairs are present on the orbits, in addition to the or- bital bristles ; antennae large, third joint almost half as large as the eye ; profile as fig. 2; arista hair-like, almost bare; proboscis short, the apical portion shorter than the subapical portion ; palpi almost bare, not much dilated. Mesonotum with the posterior paii- of dorso-centrals large, the- FORMOSAN AGROMYZllJAi;. 311 anterior pair, and the pair of biistlfs between the posterior pair, weak; discal setulae, numerous, l)ut not strong; apical pair of scutellar bristles long, the basal pair weak. Abdomen with short surface hairs. Legs with short hairs, the ventral surface of the femora with the hairs stronger; a distinct hair at apex of the mid trochanter, which is directed alongside of the femur. Wing as fig. IS. Lengtli 1— 1*5 mm. Locality: Takao, April lU, DOT. Paratypes and allotype: Same locality, 8()() m., March 31, 11)07. Female: Similar to the male, except in having the antennie smaller, and in being rather larger over all. Phyllomyza nudipalpis n, sp. Male: Black. Fore til)ite and all tarsi yellowish; mid pair and bases of hind pair, brownish-yellow. Mesonotum grayish-ljrown pollinose ; pleur.ie, with a shining black area in front of mid coxse, the rest grayish polhnose. Abdomen subopaque. Palpi and halteres black. Squamse grayish, the fringe dark. The upper 8 pairs of orlntal bristles directed outwards over the eye, the lower 2 pairs directed inwards ; orbits distinct, slightly shining, the central stripe velvety-black ; orbits with a few weak hairs in addition to the bristles ; cruciate setulie weak ; profile as fig. 3 ; arista placed very near to the anterior upper angle of third joint, hair-like, with very slight pubescence ; proboscis very much shorter than the much enlarged, bare palpi. Mesonotum with the same bristles as lutei'palpis. Legs with short surface hairs. Wings as fig. 1(). Length : 2 mm. Locality: Takao, 300 m., April 18, 1907. One male. Phyllomyza dilatata n. sp. Male: Orbits and frontal triangle shining black, center stripe deep black, opaque ; antenna?, palpi and proboscis black. Mesonotum shining, black, with but slight signs of pollinosity ; pleurae glossy, w^ith only slight pollinosity below wing base and posteriorly. Abdomen subopaque, black. Legs yellow, coxa;, and femora, except the extreme bases and apices, black- brown. Squamae brownish, fringe brown. Halteres reddish yellow. Wings clear, veins browai. Orbital bristles similar to (hose of nudipalpis, l)ut much stronger, the second lowest paii- nnich stronger than the lowest pair; the cruciate 312 J. R. BIALLOCH. central setulae dii^tinct ; second antenna! joint with a very distinct bristle at the apex, which is almost as long as the height of the third joint ; third joint rounded ; the arista not as near to the apex as in the last species, and rather more distinctly pubescent ; cheek linear ; profile as fig. 1 ; palpi leaflike; proboscis short, geniculated. Mesonotum and scutellum bristled as in luteiyal'pis. Legs with the hind femora thickened; several bristle-like hairs of the antero-ventral surface of hind femur from about the middle to the apex; all legs wdth numerous short surface hairs. Wings as fig. 17. Length: 2*75 mm. Locality : Toyenmongai. One male. Milichiella lacteipennis Lo^ew. Lobioptera lacteipennis LoEW, Berl. ent. Zeitschr., 1865, p. 185. There is a single female of this very widely distributed species amongst the material taken at Tainan. AGEOMYZINAE. Cerodonta acuticornis Meigen. Agromyza ucuticorni-s Meigen, Syst. Beschreib., VI, 1826, p. 175, 26. Three examples, Takao, May 3, 1907, and one Tainan, February. Table of species i n A g r o ni y z a. 1. Frons, lateral margins of mesouutniu. and disc of scutelluui yellow 2. — At least the scutellum entirely black 3. 2. Disc of mesonotum glossy black, the yellow color not carried across in front of the scutellum 1. 'pusilla Meigen. — Disc of mesonotum dull grayish-black, the ^-ellow color carried distinctly across in front of the scutellum 2. snbjntsilla n. sp. 3. Frons yellow 4. — Frons black, or lilack brown 8. 4. Femora, entirely, or mostly, yellow, only sometimes slightly brownish at apices 5. — Femora entirely black, or only the apices yellow 6. 5. Glossy black species, pleurae black ; femora entirely yellow. 3. flavofentorata n. sp. — Dull, black-gray species ; pleurae yellow ; femora more or less browned at apices 4. fonnosensis n. sp. 6. Legs entirely black 5. fwntella n. sp. — Legs with apices of femora clear yellow 7. FOKMOSAN AGROMYZIDAK. 313 7. Frons clear leiiiuu yellcnv ; last section of fifth vein at most as long as penul- timate section ; generally shorter. 6. longii^ennis Loew, var. nigricoxa n. var. — Frons brownish: last section of fifth vein distinctly longer than i)enultimate section 7. brunnifrons n. sp. 8. Apices of femora and bases of i'\\mv, narrowly, but conspicuously j^ellow, contrasting with tlie other jiarts of the legs, which are brownish black. 7. hvminifrons n. sp. — Legs unicoloious black, or at least with the knees not conspicuously yellow. . 9. 9. Halteres entirely yellow 10. — Halteres at least partly black 16. 10. Squanue yellow, or wliitish. the fi'inge ]>ale 11. — Squam* brownish, the fringe coucolorous 12. 11. Mesonotuni with 4 pairs of dorso-centrals 8. fldvisquama n. sp. — Two strong and one weak pairs of dorso-centrals on the mesonotuni. . . 13. 12. Wings whitish, veins almost colorless; 6 pairs of bristles on the orbits. 9. niveipennis n. sp. — Wings hyaline, veins distinct ; 5 pairs of orbitals 10. jAebeia n. sp. 13. Penultimate section of the fifth vein distinctly shorter than the last section; legs entirely black 11. atrata n. sp. — Penultimate section of fifth vein distinctly longer than the last section; tarsi yellowish 14. 14. Small species, l"o mm; wings short and l)roa(l 12. latipennis n. sp. — Larger species, 2 mm. and over, wings normal 15. 15. Tarsi black : inner cross vein at very distinctly before the middle of the discal cell, and before the end of first vein 13. koshunensis n. sp. — Tarsi yellowish ; inner cross vein at slighth- before the middle of discal cell, and just below the end of first vein 14. obesa n. S]i. 16. Sciuamge white or yellow, fringe pale 17. — Squamse blackish or brownish, fringe dark 21. 17. Frontal triangle very broad, extending to lunule, metallic greenish black, at middle of frons occupying over one halt the width of center stripe; e3'es of male distinctly hairy on an area alio^-e, most readilj" seen from the side. 15. obfusa n. s]). — Frontal triangle not very broad, with an acute apex, the sides rapidly con- verging anteriorly IS. 18. Large species, averaging over 3 nan; eyes of male distinctly hairy above, those of the female slightly pubescent 16. lasiops n. sp. — Smaller species, averaging about 2*5 mm ; eyes of male not hairy 19. 19. Mouth margin slightly produced ; upper margin of basal joint of antenna at below the level of the middle of the eyes; inner cross vein at distinctly beyond the middle of the discal cell 17. producta n. sp. — Species without the above combination of characters 20. 20. Arista covered with dense pi^bescence which is at least twice as long as the basal diameter of the arista ; cheek linear 18. piliseta n. sp. 314 J. K. MALLOCH. — Arista tapering, almost l)are, the pubescence never distinctly longer than the basal diameter of the arista; cheek distinct, though not Ijroad. 19. prolifica n. sp. 21. Cheek produced into a distinct })oint anteriorly 20. atujidiceps n. sp — Cheek not angularly i)roduced anteriorly 22. 22. Mesonotum with three pairs of dorso-central bristles 21. (iliend n. sp. — Mesonotum with two pairs of dorso-central bristles 23. 23. Fore tibia with a distinct setula on the posterior side at aliout the middle.. 24. — Fore tibia without such bristle 25. 24. Halteres entirely black 22. setigera n. sj). — Halteres lilack, the apical part of the knob pale yellow. 23. variihaltemta n. sp. 25. Subopaque black species; frons buccate ; last section of fifth vein subequal with last section 24. Sauteri n. sp. — Shining black species ; frons not buccate 26. 26. Frontal triangle subshining : penultimate section of fourth vein subequal with the preceding section 25. suhfusca n. sp. — Frontal triangle gkissy ; penultimate secti(Hi of fourth vein shorter than pre ceding section 27. 27. Small species, 1 — 1-75 mm 26. atofudla n. sp. — Larger species, 2"5 — 2'75 mm 27. nigrisquamd n. sp. 1. Agromyza pusilla Meigen. Afjroinyza pusilla Meigen, Syst. Beschreib., vol. 0, 1830, p. 185, species 60. Specimens of this w^idely (listril)uted species are amongst the material before me from the following localities, Tainan, Takao and Taihoku. Nine specimens in all. 2. Agromyza subpusilla n. sp. Male: Yellow, subopaque. Head and all its parts, except the vertex and back, as well as the ocellar region, which are blackish, yellow. Meso- notum opaque, grayish-black on disc, the marking resembling that on the thorax of melampyya Loew, but the posterior yellow excisions not so clearly defined; the central one represented in type l)y a triangular mark; pleurae with a slight darkening above fore coxa, and a large blackish-gray mark between mid and hind coxae; scutellum blackened on each side at base; postnotum gray, yellow just below scutellum. Al)domen brownish, the posterior margins of all segments yellow. Legs yellow, tibiae and tarsi slightly browned. Wings clear, veins black-brown. Squamae yellow. Hal- teres yellow. Orbits with four pairs of bristles, which are rather w'eak, and decrease FOBMOSAN ACJROMYZIDAE. 315 in size anteriorly ; antenna; rather small, third joint rounded ; arista slightly thickened, bare, and as long as length of frons ; head in profile as fig. 6 ; Mesonotum with 2 pairs of strong and 2 pairs of much weaker dorso-cen- trals, the third and anterior pairs the weakest, the former being close to the suture ; very few hairs on disc, no bristles discernable between the posterior pair of dorso-centrals ; scutellum with four subequal bristles. Legs normal; no distinguishable bristles on mid tibia. Wing venation as fig. 5. Length: r25 mm. Locality : Tainan. One specimen. 3, Agromyza flavofemorata n. sp. Male: Black. Head yellow, vertex, ocellar region and back of head black, orbits darkened posteriorly, becoming yellow anteriorly ; third antennal joint reddish, the basal joints clear yellow ; arista black-ln'own ; palpi and proboscis yellow. Mesonotum and scutellum glossy black ; pleura? brown-black, opaque ; postnotum black, becoming yellow just below the scutellum. Abdomen glossy black on dorsum, yellowish on venter; hypo- pygium black. Legs yellow, apices of tibiae slightly, and the tarsi more distinctly lirowned. Wings clear, veins black, the base of wings yellowish. Squama; yellow. Halteres yellow. Orbits with four pairs of bristles, which decrease slightly in strength anteriorly, ()rl)its wide, each al:)out equal to half the width of the central stripe, very few weak hairs on the orbits in addition to the bristles; head in profile as fig. 7 ; arista with close and short pubescence ; vibrissa slightly differentiated. Mesonotum with very slight grayish pollinosity on sur- face; 4 pairs of dorso-centrals present, the 2 anterior pairs weak; about three row^s of weak hairs between tlie dorso-centrals anteriorly, and no bristles between the posterior pair of dorso-centnils ; scutellum with 4 sul)e(|ual lu'istles. Abdomen elongate, cylindi'ical : hy])()])ygium slightly over the normal size; all abdominal segments covered with short hairs. Legs rather slender; mid tibia without distinct bristles on the posterior surface. Wing as fig. L5. Length: 1-75. Locality: Polisha. One specimen. 4. Agromyza formosensis n. sp. Male: Yellow, subopatjue. Head pale yellow, back of head, vertex, and ocellar region grayisli, central stripe reddish yellow ; third antennal joint with a large reddish-brown mark at the insertion of tlie arista, re- 316 J. R. MALLOCH. mainder of antennse pale yellow ; arista brown ; palpi and proboscis yellow. Disc of mesonotum broadly opaque gray, tbis color extending less distinctly to lateral margins ; scutellum concolorous with the disc, in the male sometimes slightly yellowish ; pleura; yellow, spotted as in suhfusilla; postnotum shining black. Abdomen yellow, each dorsal segment broadly browned on base, leaving only a narrow posterior yellow fascia ; hypopygium yellow. Legs yellow, apices of fore femora slightly blackened dorsally, apices of other femora very indistinctly browned; all tibiae and tarsi brownish yell- ow. Wings almost clear, veins brown, fifth vein indistinct at apex. Squamae and halteres yellow. Orbits with 3 pairs of bristles, which decrease slightly in size anteriorly, otherwise, generally, bare; profile almost as in suhpusilla; arista thickened, the pubescence very indistinct ; cheek with a few marginal hairs, the vibrissa very weak. Mesonotum with the bristling as in suhpusilla, the area between the dorso-centrals bare, or with a few scattered, short hairs, forming two irregular rows. Abdomen elongate, narrow ; hypopygium normal. Legs slender, no bristles on the posterior surface of the mid tibia. Wing venation almost as in suhpusilla, the small cross vein generally slightly before the middle of the discal cell ; last section of the fourth vein about six times as long as the penultimate section ; last section of fifth vein about one and three-fourths the length of the penultimate section, generally evanes- cent on apical third. Length: 1*5— 1*75 nnn. Female : Similar to the male in color etc. ; the ovipositor glossy brown- black. The wings are sometimes slightly grayish in this sex. Locality : Taihoku. Seven specimens. 5. Agromyza frontella n. sp. Female: Black, subshining. Head yellow, slightly ochreous ; back of head, ocellar region, and upper half of orbits blackened; face brown in the depressions where the antemite lie, the margins yellow; antennae black ; inner mouth margin glossy l)lack ; palpi and proboscis yellowish. Mesonotum with brownish pollinosity, scutellum concolorous ; pleurae shining l)lack, the sutures and below wing base brown. Abdomen with slight indications of very narrow pale posterior margins to the segments ; venter yellowish, most distinct on lateral margins at middle ; ovipositor glossy black. Legs black, or black-l)rown. Squamae brownish yellow, fringe concolorous. Wings clear, veins brown. Halteres ^^ellow, knob white. Four orbital bristles present, which are rather weak and decrease but slightly anteriorly, the upper two pairs directed backwards, the lower FORMOSAN AGROMYZIDAE. 317 two pairs directed inwards ; orbits otherwise bare ; width of each orbit less than half the width of central stripe, the bristles situated near to the eye margins ; profile as fig. 8 ; arista very short, not longer than the width of the frons at the anterior margin, bare; eyes bare. Mesonotum with 2 distinct pairs of dorso-centrals, and in front of the anterior pair a series of setulse, the most posterior of wdiich is stronger than the others, and may be in some cases strong enough to rank as a dorso-central, in which cases the anterior setulfe will also be correspondingly increased in size; disc with numerous short hairs, about 8 rows between the dorsocentrals ; no differentiated bristles between the posterior dorso-centrals. Abdomen subovate ; ovipositor distinctly protruding, rather short and flattened. Legs moderately stout; mid tibiae without discernable bristles. Wing as fig. 4. Length: 1"25. Locality: Pilam, August, 1912. Allied to A. gyrans Fallen, but readily separated by the yellow^ palpi, which are exceptionally small, and the pale frons as well as other, minor, characters. 6. Agromyza longipennis Loew, var. nigricoxa n. var. This variety differs from the type form in having the apex of the second joint of the anteimse clear yellow, contrasting sharply with the black base; the vibrissa less distinctly differentiated; and the fore coxae blackened instead of yellow. Longiyennis Loew is very closely related to geniculata Fallen, the differences between which and the former I have pointed out in my recent paper on the genus Agromyza, in the Annals of the Entomological So- ciety of America, vol. 6, 1913, No. 8. The pubescence of the arista in the form here listed is much less distinct than in the type form is, and possibly the examination of more material may result in the elevation of the former to specific rank. Three specimens, Takao, May 8, 1907. 7, Agromyza brunnifrons n. sp. Female: Black, shining. Frons black-browir, becoming black above the lunule; orbits shining, center stripe opaque; lunule yellow; antennae black-brown, apex of second and base of third joints yellow ; arista brown ; face and cheeks pale yellow ; prol)oscis and palpi yellow. Disc of mesonotum, scutellum, and pleurae shining l)lack, with slight indications of gray polli- 318 J. K. MALLOCH. nosity ; the narrow upper margin and vertical suture of pleurte, as well as the usual patch below wing base, yellowish. Squam*, their fringes and the halteres yellow. Abdomen black, rather glossy, the segments without pale margins ; ovipositor gloss^y black. Legs l^lack, shining, the apices of the femora and the bases of the tibife rather broadly clear yellow. Wings clear, veins V)lack. Frons over one third the head wddth ; orbits wdth 4 pairs of bristles, which are not very strong and slightly decrease in strength anteriorly ; antennge rather small, third joint rounded, very slightly pilose ; arista about as long as frons, the pubescence very short ; face slightly receding, concave in profile, the cheek short and not over one sixth as high as eye ; marginal bristles weak, vibrissa not strong. Mesonotum with four pairs of dorso-centrals, the anterior two pairs slightly weaker than the posterior two pairs; 5 — 6 rows of setuhe between the anterior dorso-centrals; no distinguisha))le bristles between the posterior pair of dorso-centrals. Ab- domen elongate, narrow ; surface hairs rather numerous and soft ; hypo- pygium thick, not elongate nor flattened. Legs normal in shape, their surfaces short-haired; no bristles on mid tibife. Costa to the end of fourth vein ; inner cross vein at slightly before the end of first vein, and at very slightly before the middle of the discal cell; veins 8 — 4 divergent on their last sections ; last section of fourth vein about 6 times as long as the penul- timate section ; last section of fifth vein about 1 ^ times as long as the penultimate section. Length : 2*25 mm. Locality : Kosempo. One specimen, November. This species is very closel.y alhed to longifermis Loew, l)ut the color of the frons is very different from tliat of the typical longi-pennis, and the wings in hrimnifrons are also not so narow, while the venation also presents some considerable differences. s. Agromyza fiavisquama n. sp. Female: Black, shining. Prol)Oscis, squamae and their fringes, and the halteres yellow. Legs black, fore til)iae, and all the tarsi, except their apices, yellowish. Wings slightly grayisli, the veins very distinct, black- browii. Frons not quite one third the head width, opaque, only the ocellar region and the orbits at the bases of the bristles shining; orbits poorly defined, their inner margin hardly discernable from the central stripe ; four pairs of orl)ital liristles present, which decrease much in length anteriorly, anterior pair only incurved ; orbits without hairs in addition to the bristles, the FOKMOSAN AGROMYZIDAE. 319 latter situati'd on near to the eve iiiargin ; aiitemise iioruial iii size, tlie upper surface of the basal joint at just about the middle of profile, second joint with a short apical l)ristle on the dorsum, third joint slightly elongate, apex rounded, pilosit,y very short ; arista very little thickened at base, pubescence very short, length of arista slightly short of from its base to the base of upper orbital bristle ; face concave in profile ; cheek linear, not over one tenth the height of the eye, margin with slight hairs, the vibrissa slightly (Hfferentiated. !Mesonotum with 4 pairs of dorso-centrals, the two anterior pairs distinctly reduced in size ; discal setulse numerous, al)Out S rather iiregular rows between the anterior dorso-centrals ; the })air of bristles between the posterior dorso-centrals distinct. Abdomen ovate, the surface hairy ; ovipositor short and broad. Legs stout ; the two bristles on the mid tibia strong. Wings slightly elongate, venation as fig. 14. Length : 8*5 nun. Locality : Chip-Chip. One specimen, March. '.». Agromyza niveipennis n. sp. Male: Black, slightly shining. Frons opaque, brown- black, the orbits subopaque ; face brownish ; palpi and proboscis black. Bquamse and the fringes j^ellowish-white. Legs black, fore tibiae and the bases of all the tarsi brownish yellow. Wings whitish, the veins vitreous, with the exception of the costa, which is lirown. Halteres yellow, knob whitish. Head rather large, the frons slightly buccate, the face sUglith' retreat- ing; width of frons one third that of head, orl)its distinct, each about equal to one third the width of the central stripe, six pairs of orbital bristles present, which are situated on near to the inner margin, and decrease sligthly in length anteriorly, the orbits otherwise almost bare; antennae of good size, third joint slightly acute at the apex on the upper side, arista about 21/2 times as long as the third joint of the antennse, almost bare, and very thin except at the base; cheek linear at the anterior margin, becoming about twice as high at the posterior margin, where it is not more than one sixth the height of the eye, marginal bristles distinct, the vibrissa weakly differentiated. Mesonotum with 2 strong and 1 weak pairs of dorso-centrals, the pair of bristles between the posterior pair of dorso-centrals strong; discal setulse numerous, and in the line of the dorso-centrals rather strong. Abdomen broadly ovate; hypopygium very similar to that of jyarmcorms LoEW. Legs strong, the mid tibia with the posterior bristles distinct. Wing with the inner cross vein at the middle of the discal cell; the last section of the fourth vein about 21/2 times as long as the penultimate section, 320 J. E. MALLOCH. ■which is about equal in length with the last section of the fifth vein; costa to end of fourth vein. Length : 2"75 mm. Female : Similar in coloration to the male, differing only in being rather larger, in having the mesonotum less hairy, and the ovipositor dis- tinctly protruding, and almost identical with that of jiarvicornis. Locality: Takao, May 3, 1907. One male and one female. This species is very close to parvicornis Loew, differing chiefly in the structure of the head, the chsetotaxy of the mesonotum and the color of the wings. 10. Agromyza plebeia n. sp. This species is so similar to niveipen,nis that it will be sufficient to indicate merely the points of difference. The color throughout is more brownish; the orbits have only 5 pairs of bristles ; the tarsi are paler in color ; the wings are not whitish, but have a slightly yellowish tinge, and their veins are distinct ; while in the female the third and fourth veins are more distinctly divergent than in iiiveipennis. Length : 2*5 mm. Locality: Takao, May 3, 1907. One male and one female. 1 i . Agromyza nigrita n. sp. Female: Deep black, slightly shining. Apex of proboscis brown. Knob of halteres clear yellow. Legs black, the tibiae slightly brownish. Wings clear, veins black. Squamse grayish the margins and fringe almost black. Frons opaque, the orbits distinctly glossy at bases of the bristles ; frons about one third the width of the head, parallel-sided ; orbits slightly differentiated from the center stripe, rather narrow, each about one fourth as wide as the center stripe ; four pairs of strong orbitals present, situated about the middle of the orbits longitudinally, decreasing in size anteriorly, the orbits otherwise bare ; frontal triangle not differentiated, ocellar region not shining; antennae moderate in size, third joint rounded, very indistinctly pilose; arista very little swollen at base, and for a very short distance, bare; length of arista equal to from its base to upper orbital bristle; face slightly retreating; cheek linear, but little higher posteriorly than ante- riorly, maginal bristles of moderate strength, vibrissa slightly differentiated. Mesonotum with four pairs of strong dorso-centrals, the anterior two pairs weaker than the posterior two pairs, the pair of bristles between the posterior dorso-centrals distinct, discal setulae not very close, but strong, about 10 rows between the anterior dorso-centrals. Abdomen short, broad at base FOKMOSAN AGROMYZIDAE. 321 the sides tapering iimcli to the apex ; ovipositor projecting, circular in cross section, not elongated. Legs strong, mid til)ia with distinct posterior bristles. Wing venation as fig. 12. Length: 2"75— 3'5 mm. Locahty: Pilam, August, 1912. Paratypes: Takao, April and May, 1912. Three females. \-2. Agromyza latipennis n. sp. Male: Black, shining. Apex of proboscis brownish. Halteres yellow, the knobs white. Legs black, the tibiae and tarsi brownish-black. SquamaB brown, the margins and the fringes dark brown. Wings clear veins black. Frons slightly less than one third the width of the head, almost paral- lel-sided, orbits slightly differentiated from the central stripe, glossy at the bases of the bristles, otherwise subopaque; ocellar triangle distinct, glossy ; four pairs of orbital bristles present, the two upper pairs backwardly directed the tw'O lower pairs inwardly directed, the bristles decreasing much in length anteriorly, the anterior pair mere hairs, orbits otherwise bare; antennae above the average in size, third joint rounded at apex, distinctly pilose ; arista tapering, rather thick, the pubescence distinct though short ; length of arista equal to from its base to upper orbital bristle ; face distinctly retreating; cheek linear, slightly higher posteriorly. Mesonotum w4th 3 pairs of dorso-centrals, the anterior pair weak ; cephalad of the anterior pair of bristles there is sometimes a setulose hair stronger than the discal setulae, which is posterior to the suture; the pair of bristles between the posterior dorso-centrals distinct ; discal setulae rather numerous, about 8 rows between the anterior dorso-centrals. Abdomen short and broad, the surface with rather long brownish hairs ; hypopygium glossy black. Legs normal in shape ; the tw^o bristles present on the posterior surface of the mid tibia. Wing very broad, veins fine and very distinct : fig. 18. Length : l"2o mm. Locahty: Takao, 300 m. alt., March 31, 1907. Female: Similar to the male in coloration and chaetotaxy ; the ovi- positor is highly glossy, and distinctly protruding. In size slightly larger than the male. Allotype and paratype : Same data as the type. 1 3. Agromyza koshunensis n. sp. Male: Black, shining. Frontal lunule white pollinose; center stripe of frons opaque, orbits and ocellar region shining; antennae and palpi black: Aniialej: Musoi Xationalis Huiinarui. XII. -A 822 J. R. MALLOCH. proboscis brown at apex. S(|uanue times FOHMOSAN AGIiOMYZIDAK. 323 setuhe. Ab- domen ovate; ovipositor stout; surface of alxlomen and ovii)ositoi- with numerous hairs. Legs slender; the mid ti!)ial bristles weak l)ut distinct. Inner cross vein at beyond end of first vein and at one third from end of discal cell; last section of fourth vein about (> times as long as penultimate section; veins 8 and 4 slightly divergent: last section of fifth vein two thirds as long as penultimate secti(Mi ; auxiliai-y vein compl(^t(\ Length : 2 nnn. Type: Tainan, Febiuary. This species belongs to the group in wliich the male has the vibirssal angle distinctly produced, and the vibrissae in the form of fasciculi. 328 J- R- MALLOCH. 21. Agromyza aliena n. sp. Female: Glossy black, becoming more brownish towards apex of abdomen. Center stripe of frons opaque black ; frontal lunule brown ; cheeks opaque, brownish; apex of proboscis pale brownish. Pleural sutures and below wing base yellowish brown. Legs brown-black. Wings slightly grayish, veins black. Squamae gray, fringe black-brown. Halteres black-brown, paler on the inner surface. Frons distinctly over one third the width of head ; orbits distinct, each about one fifth as wide as center stripe; 4 pairs of moderate-sized orbital bristles present, which decrease slightly in size anteriorly, the an- terior two pairs incurved ; several short hairs on orbits, in addition to the bristles ; frontal triangle indistinct, only glossy on a very narrow stripe below ocelli; antennae of moderate size, inserted below middle of profile, dorsal bristle on second joint distinct; third joint slightly longer than broad, rounded at apex; arista swollen at base, tapering, shghtly pubes- cent, its entire length almost equal to that of frons ; face concave ; cheek about one sixth as high as eye, marginal hairs numerous, vibrissa differen- tiated. Mesonotum with 3 pairs of dorso-centrals, the anterior pair weak; discal setulae numerous, but not long, about 10 rows between the dorso- centrals ; no strong bristles between the posterior dorso-centrals ; the setulae carried to the posterior margin. Abdomen broadly ovate ; surface with distinct hairs, which become bristle-like on the posterior and lateral margins ; ovipositor tapering, glossy black. Legs normal in shape ; mid tibia with the posterior bristles distinct. Inner cross vein at below end of first vein and at two fifths from apex of discal cell ; last section of fourth vein 4 times as long as penultimate section ; veins 3 and 4 distinctly divergent ; last section of fifth vein two thirds as long as penultimate section. Length: 2*75 mm. Type: Sokotsu, May, 1912. 22. Agromyza setigera n. sp. Female: In coloration identical with variihaUerata except that the halteres are unicolorous black- brown. Frons slightly less than one third the width of the head; center stripe opaque, orbits shining; each orbit about one fourth the width of center stripe, distinct ; 4 pairs of orbital bristles present, the three upper pairs strong, the anterior pair weak, incurved ; hairs on orbits weak, but numerous ; frontal triangle indistinct, only represented by a narrow glossy stripe below the ocelli; antennae as in varihalterata; cheek short, narrow, FORMOSAN AGROMYZIDAE. 329 not one-eighth as high as eye; marginal hairs numerous; vibrissa well differentiated. Mesonotum, abdomen, and legs as in variihalteraia. Wing -with the inner cross vein at middle of discal cell and at below end of first vein; last section of fourth vein 31/2 times as long as penultimate section; last sections of veins 3 and 4 subparallel ; last section of fifth vein over two thirds as long as penultimate section. Length: 3-3-75 mm. Type: Tainan, April, 1912. Paratypes: Tainan, May, 1912; Takao, 300 m., April 18, 1907, two specimens; Koshun, September; Kankau, August, 1912. A female from Takao, April, 1907, has the last sections of the third and fourth veins slightly divergent, but in other respects agrees with the type. 2;). Agromyza variihalterata n. sp. Male: Glossy black. Frons, hicluding the triangle, opaque black, the orbits glossy; lunule white pollinose ; face and cheeks opaque black; apex of proboscis yellowish. Mesonotum and pleurae with slight brownish pollinosity. Abdomen with a slight indication of a greenish luster. Legs subopaque black. Wings clear, veins black. Squamse grayish, margins and fringe black. Halteres black, apex of knob whitish. Frons one third as wide as head ; orbits distinct, each about one third as wide as center stripe, 4 pairs of moderate-sized orbital bristles present, w^hich decrease slightly in strength anteriorly, the anterior pair incurved, orbits otherwise bare; frontal triangle not discernable; antennge normal in size, inserted below middle of profile, second joint with short dorsal bristle, third joint rounded ; arista almost bare, tapering, almost as long as frons ; cheek short and narrow, not more than one-eighth as high as eye, marginal hairs distinct, vibrissa well differentiated. Mesonotum with 2 pairs of dorso- centrals, otherwise as in aliena, except that the setulse are not carried as far posteriorly. Abdomen ovate ; lamella of hypopygium elongated, their length equal to that of the last abdominal segment ; hairs on abdomen not so con- spicuous as in aliena. Legs rather slender; fore tibia with a setula on the posterior surface at about the middle ; mid tibial bristles longer than in allied species, the upper one being much longer than the diameter of the tibia. Inner cross vein at before the end of first vein and at one third from base of discal cell ; last section of fourth vein about 21/2 times as long as penultimate section ; last sections of veins 3 and 4 gradually divergent ; last section of fifth vein three fourths as long as penultimate section : auxiliary vein complete. Length: 2*75 mm. Type: Koshun, March. 330 J. K. MALLOCH. ^4. Agromyza Sauteri n. sp. Male: Black, subopa(|iie, ahdonien sliglitly more shining than tlie thorax. Wings shghtly brownis^lj, veins very tli*t.inet, rilig4itly thiclvened, fuscous black. Squaniie, their fringes, and the halteres black-brown. Frons at vertex over one half the head width, slightly narrowed anteriorly ; orbits broad, each over one third the width of center stripe, distinct, 4 pairs of hair-like orl)itals present (on one side 5) which do not decrease much in size anteriorly, and are with the exception of the upper pair incurved; hairs on orl;its distinct and rather long; frontal triangle poorly defined, subtriangular ; antennse below the normal in size, upper margin of basal joint above middle of profile, third joint rounded ; arista thickened on its basal third, almost bare, its entire length about i% times as long as antenna, and equal to anterior breadtli of frons ; face receding ; frons buccate, very distinctly visil)le on its entire length above eyes when viewed laterally ; cheek about one fifth the eye height, marginal hairs distinct, vibrissa differentiated. Mesonotum with "2 pairs of dorso-centrals, which are subec^ual in length; disc with rather long setulae, which do not extend much beyond the transverse line of the anterior dorso-centrals. Abdomen subovate, surface with numerous hairs ; hypopygium normal. Legs normal ; mid tibia with the posterior bristles present, but weak. Iimer cross vein at just beyond end of first vein and at one third from apex of discal cell ; last section of fourth vein 5 time-i as long as penultimate section ; last section of fifth vein suljerjual with penultimate ^section ; sixth vein reaching three- fourths of the length to wing margin. Length : '2" 5 mm. Type : Chip-Chip, February. i25. Agromyza subfusca n. sp. Male: Black, shining, alulomen glossy. Frons opaque, triangle not glossy, barely shining. Legs shining black, fore tarsi brownish. \\'ings slightly grayish, veins thick, fuscous black. Squamae pale brown, fringes brown. Halteres with l)lack knol) and pale stem. Frons at vertex over one third the width of head, slightly narrowed anteriorly; orbits barely differentiated, opaque except at bases of the bristles ; 4 pairs of orbitals present, the 2 upper pairs strong, the 2 lower pairs weaker and incurved ; orbital hairs sparse and short ; frontal triangle elongate, reaching to slightly beyond middle of frons ; viewed from the side the frons is narrowly visible above the eyes; antennae small, inserted at middle of profile, third joint rounded; arista swollen at base, slightly FOR.MOSAN AOHOMYZlDAi;. 831 pubescent, its eiitii-e leii^tli al)Oui equal to 4 times that of antenna, and nearly twice as long as width of frons at anterior margin; cheek al)out one sixth as high as eye, marginal hairs rather strong, upcurved above, vibrissa differentiated; face almost straight. Mesonotum with 2 pairs of dorso-centrals, the anterior pair weaker than the posterior pair; discal setulae weaker than in Snider i, and carried almost to the posterior margin of disc. Abdomen broader than in Sauteri. Legs strong; mid tibia with the posterior setuh« weak. Inner cross vein at below end of first vein and at middle of discal cell; last section of fourth vein 81 ^ times as long as penul- timate section; veins 8 and 4 slightly divergent at apices; last section of fifth vein very slightly shorter than penultimate section ; sixth vein leaching over three fourths to wing margin. Length : 2"o mm. Type: Pilam, August, 191*2. A single example from Tainan, April, 1912, in which the outer cross vein is absent on one wing, appears to belong to this species. 2(). Agromyza atomella n. sp. Male: Glossy l)lack. Frontal stripe opaque. Squamte biown, fringe blackish. Wings clear, veins black. Frons one-third the width of head, convergent anteriorly ; oibits distinct, narrow, 4 pairs of orbitals present, the upper 2 pairs moderately strong, the lower 2 pairs weaker, incurved ; hairs on orbits weak ; frontal triangle broad, reaching to middle of frons; antennae normal in size ; arista as long as length of frons ; cheek about one sixth as high as eye, marginal hairs weak, vibrissa slightly differentiated. Mesonotum with 2 strong pairs of dorso-centrals; discal setulae of moderate strength. Abdomen broadly ovate. Mid tibiae with the posterior setulae weak. Liner cross vein at one third from apex of discal cell and at slightly beyond end of first vein; veins 8 and 4 suljparallel on apical sections ; last section of fifth vein about three fourths as long as penultimate section. Length: 1—1*75 mm. Type: Pilam, August, 1912. Para types: Tainan; Takao ; Pilam; Anping. Twenty specimens. This species is variable in the situation of the cross vein, and the course of the third and fourth veins, which are sometimes divergent on their apical sections. 332 J. R. MALLOCH. 27. Agromyza nigrisquama n. sp. This species is very similar to the above, but differs in being com- paratively larger, 2*5— 2'75 mm, the wings are more elongated, with the cross veins more consistently approximated, the cheek about one-third the height of the eye, and in its more robust form. Type: Tainan, April, 1912. Paratypes : Tainan, Takao, and Chip-Chip. Twenty-two specimens. OCHTHIPHILINAE. Leucopis apicalis n. sj). Male: Black, densely covered with silvery pollen. Frons brownish, covered with silvery pollen ; antennae and arista yellow, the latter darkened apically, and the former brownish at base; palpi brown- black; proboscis yellow at apex. Mesonotum in too poor a condition in specimens to say de- finitely if striped, but from the fact that the setulse are arranged in rows I infer that it should have at least distinguishable vittse. Basal segment of abdomen without spots, second and succeeding segments with a narrow median and very small lateral black spots. Legs yellow, coxae brownish, femora, except bases and apices, black, middle of all tibiae brownish, apical tarsal joint on all legs brown. Wings milk-white, veins almost colorless. Frons one-third the width of head ; antennae of moderate size, third joint as long as broad, upper apical margin slightly angulate, lower apical margin rounded ; arista not longer than anterior width of frons, basal joints elongated, occupying one-third of the entire length, swollen; cheek barely one third the height of eye. Mesonotum with normal hairing. Hypopygium rather large and knob-like. Legs strong, without bristles. Liner cross vein at beyond the end of first vein and slightly less than one-third from apex of discal cell; last section of fourth vein about 5 times as long as penulti- mate section ; veins 3 and 4 convergent at apices ; last section of fifth vein 1^ times as long as outer cross vein. Length: 2— 2"5 mm. Type: Tainan, February. Paratype: Same data. Female : Similar to the male in color and structure except that the ovipositor is inconspicuous, and the inner cross vein is situated nearer to the middle of the discal cell. Allotype: Same data as type. FORMOSAN AGROMYZIDAE. 333 Crypto chaetum grandicorne Rondani. Bull. Soc. Eiit. Ital., 187."., p. 172. A single example of this species, Polisha, December. PHYTOMYZIXAE. Napomyza atrata n. sp. Female: Glossy black. Fions opaque, frontal triangle and orbits glossy black; antennae, palpi, and proboscis l)lack, the apex of the latter brownish. Legs brownish-black, shining, tarsi yellowish. Wings slightly brownish, veins deep brown, fourth vein from the cross vein to its apex indistinct. Squamae grayish, fringes brown. Halteres whitish yellow. Frons distinctly less than one-third the width of head, orbits narrow, each about one-fourth as wide as center stripe, well differentiated ; 4 pairs of orbitals present, the upper pair- very strong, the others decreasing ra- pidly in size anteriorly, the front pair being reduced to mere hairs, orbits otherwise bare; triangle small, reaching very little beyond the anterior ocellus, Init well defined ; antennae small, third joint rounded ; arista al- most bare, slender, its length etjual to that of frons ; cheek linear, slightly broadened posteriorly, marginal hairs weak, vibrissa slightly differentiated. Mesonotum with '2 pairs of strong dorso-centrals, and generally a weak, anterior pair; discal setulae numerous, about ten rows between the dorso- centrals. Abdomen ovate, surface with short hairs ; ovipositor short, shghtly spatulate at apex, very similar in shape to that of Agromyza jyarvicornis LoEW. Legs of moderate strength ; mid tibiae with 2 very weak posterior setulae, as in most species of Agrontijza. Wing venation as fig 10. Length : 3 mm. Type : Kosempo, November. Male: Similar in coloration to the female, except that the tarsi are paler, and the wings are almost clear. In both the males Ijefore me the size is about 1'75 mm, and there is a yellow central organ to the liypopy- gium,. which is very distinctly protruded. Li one example the venation is similar to that of the female, while in the other the large cross vein is distinctly in front of the small one. Allotype: Takao, October 24, 1907. Paratype: Tainan, ^lay, 1912. This species has much tiie habitus of som(> of the species in the genus Agromyza, especially of the parricornis group, and is very different from the type species of Napomysa, which is slender in build, and resembles thus the 334 J. a- MALLOCH. species in Phytomyza, the great majority of which are slender species. I have located atrata in Napomyza, simply on account of its venation, which is, I am confident, not a relialjle guide to the natural affinities of the species in this family, but which is the most readily apprecialile, and, at present, the one most in use. Phytomyza Fallen. T a b 1 e f) f species. 1. Acrostichals absent snhaf finis n. sp. — Acrostichals present 2. 2. Glossy black species ; niesonotuni with three pairs of dorso-centrals, the an- terior pair very weak; antennte with the third joind produced into a short thorn-like point at apex on the upper side; small, robust species. spicata n. sp. — Black species, the thorax with dense gray pollen, abdomen shining black, with narrow pale yellow jiosterior margins to the segments : 4 strong })air3 of dorso-centrals on mesonotuni: antenn* without an acute apex to third joint : larger, slender species af finis Fallen. Phytomyza affinis Fallen. Dipt. Suec. Phytomyz. 3. li. (1813). A single specimen of this widely distributed species from Taihoku, April, 1912. Phytomyza spicata n. sp. Female: Glossy black. Frons, with the exception of the triangle and orbits, opaque black; apex of proboscis yellowish; palpi black. Legs entirely black. Wings clear, yellowish at base, veins 1, 2 and 3 brown-black. Squamse and halteres whitish. Frons shghtly less than one-third the wddth of head; orbits distinct, each about one-third the width of center stripe, 3 pairs of orbitals present, the upper pair strong, the others rapidly decreasing in length anteriorly and incurved; triangle well defined, broad, reaching to middle of frons; head, in profile, with frons declevitous, face concave; antennae inserted below middle of profile, small, third joint slightly longer than broad, its apex on upper side produced into a slight tooth ; arista tapering, not much swollen at base, nearly bare, its length about equal to that of frons ; cheek short, about one-third as high as eye, marginal hairs w-eak, vibrissa well differentiated; eye narrowed anteriorly, not round. Mesonotum with 3 pairs of dorso-centrals, the anterior pair well behind the suture, and very FORMOSAN Adllo.MYZIDAK. 8B5 weak; discal selula* Aveak, about S irregular rows between anterior dorso- centrals. Abdomen ovate: ovipositor stout. Leffs slender; tibia* without setulae. Second costal division 1 U times as k)ng as first ; third, one-thii'd as long as first ; ajX'X of costa at end of third vein and as far from apex of wing, measuring round the margin of wing, as the length of first costal division: fourth vein ending at wing tip. Length: r25 mm. Type: Tainan. May. l!tl-2. Paratyi)e: Takao. April :>:]. li»07. Phytomyza subaffinis n. sp. Female: Black. Head yellow; ocellar region, antenna*, and arista black; palpi brownish. Entire thoiax densely covered with gray pollen. Abdomen glossy black with the dorsum slightly gray dusted, and the posterior margins of the segments narrowly yellow. Legs black, knees narrowly yellow. Wings slightly grayish, veins distinct, Inownish, fourth slightly less conspicuous than fifth, first and third very distinct, though not thickened. Squamte and their fringes grayish. Halteres pale yellow. Frons two-fifths the head width: orbits distinct, each about one half as wide as center sti'ipe ; thiee pairs of orl)itals present, which decrease in length anteriorly, and in addition to these there are a few hairs nearer to the eye margin; antennte of moderate size, third joint rounded; arista thickened, tapering to shgthly beyond middle, bare, its length equal to that of frons; cheek one-third as high as eye, marginal hairs distinct, vil)iissa well differentiated. Mesonotum with 4 pairs of strong dorso-centrals, whi(di do not decrease much in length anteriorly : disc between the dorso- centrals bare, or rarely with one or two scattered setulae: no bristles between the posterior dorso-centrals. Abdomen elongate, surface with a few short hairs; ovipositor stout, as long as the last segment. Legs slender; tibice unarmed. Wings more elongate than in spicafa, but the costal divi- sions similar. Length: LTo— •2-5 nun. Type: Chip-Chip, February. Paratypes: Taihoku. Apiil. 1!»1'2: Chip-Chii». February. 1912. '.] spe- cimens; Tainan. February. Male: Similar to the female in color and cluetotaxy. The hypopygium is large and rather pi-ominent, its form very similar to that of the species in Agw}fui:((. Alloty[)e: Tainan. February. 336 J- K- MALLOCH. EXPLANATION OF FIGUKES. Plate IX. Fig. 1. Phi/llomyza dilatata, Head. <( 2. Phijllomyza luteipalpis. Head. « 3. Phyllomyza nudipalpis. Head. « 4. Agromyza fronfella, Wing. ' « 5. Agromyza subpusilla. Wing. « 6. Agromyza subpusilla, Head. « 7. Agromyza jlavojemorata. Head. « 8. Agromyza frontcUa, Head. « 9. Pseudorhicnoessa spinipes, Wing. « 10. Napomyza atrata. Wing. Plate X. Fig. 11. Agromyza lasiops, Wing. « 12. Agromyza. nigrita. Wing. « 13. Agromyza latipennis, Wing. « 14. Agromyza jlavisquama. Wing. « 15. Agromyza. flavofemorata. Wing,