Si 1h Hee , ae “ a a, 2 Unirep Srates NaTIonaL 5, ON THE SERPENTS OF NEW-YORK: WITH A NOTICE OF A SPECIES NOT HITHERTO INCLUDED | IN THE FAUNA OF THE STATE. | tee BY SPENCER F. BAIRD, C. VAN BENTHUYSEN, PRINTER 1854. ON THE — SERPENTS OF NEW-YORK;_ WITH A NOTICE OF A SPECIES NOT HITHERTO INCLUDED IN THE FAUNA OF THE STATE. BY SPENCER F, BAIRD, SMITHSONIAN INSTITUTION LIBRARIES ALBANY : ©. VAN BENTHUYSEN, PRINTER. 1854. ey ae is ies Ba uit titi, Tey SM ae A AGIA an Hite. bs rar 4 ‘ : te , ay ae 5 ots ae pel oe ia - a p. ; ‘ F aa he: 4 ie ae ee a ne oe Gs “f , , a Ms . ~ > xs c = a 4 * J : 3 ; gd ; » ; : HAE S CoE. BO Be RES Be ides ead eee rs ) » tees Vance iG ON THE SERPENTS OF NEW-YORK ; WITH A NOTICE OF A SPECIES NOT HITHERTO INCLUDED IN THE FAUNA OF THE STATE. BY SPENCER F. BAIRD. WASHINGTON, D.C. Ar the suggestion of Dr. T. Romeyn Beck, Secretary of the Board of Regents of the University of New-York, I embrace the occasion of adding a serpent, not hitherto included in the Fauna of New- York, to present the principal characters of the genera of New- York Ophidians, with a brief synopsis of the species. The entire number described by Dr. Dexay, in the Fauna of New-York, amounted to fifteen, distributed into seven genera : to these Mr. GrerHarp, the able Curator of the State Cabinet, has added a six- teenth, Crotalophorus tergeminus. The species I now propose to notice is the Storeria occipito-maculata, one of the most abundant of all, though, on account of its diminutive size, usually over- looked ; thus making the seventeenth. My attention was first called to the existence of this species in the State by Dr. Avery J. Sxiiron, of Troy, who, in 1847, showed me the first specimen I had ever seen. Subsequently I found it very common on Lake Champlain, at Westport, N.Y. Usually associated with the Tropidonotus dekayi of Hotsroox ( Storeria dekayi, B. & G.), it has a strong resemblance to it in general appearance as well as size, and indeed has often been confounded with it, though easily distinguishable by well-marked characters. 1 2 The particular eatures of this serpent will be given in the synopsis of the New-York species. With the great increase in the number of known species of North-American serpents, it has become impossible to place all in the genera to which American herpetologists have hitherto assigned them. The magnificent work of Dr. Hotzroox, completed in 1842, gives forty-seven species as the result of his laborious investigations, continued for many years, among our Ophidia. Owing, however, to the immense accessions supplied by the many government expeditions, especially by the United States and Mexican Boundary Survey, this number has been greatly enlarged ; so much so, indeed, that at least one hundred and thirty species are known to exist in this country, north of Mexico. The necessity for greater precision in defining not only the specific, but also the generic features of this vast number, induced Mr. Grrarp and myself to take up the subject from the beginning, and remodel the whole. In the course of our investigations, we discovered that many genera, supposed to be common to Europe and America, had no such extended distribution ; a critical comparison of different species from the two countries, considered as of the same genus, resulting in the detection of differences in generic features. It may be proper to premise that the difficulties in the way of any accurate comparisons or investigations into this subject were greatly increased by the almost entire absence of systematic trea- tises on the Colubride, to which family most North-American species belong. The great work on Reptiles by Messrs. Dumeri and Brisron (Erpétologie Générale) has been delayed completion for fourteen years, confessedly on account of the difficulty of coming to any correct conclusion in regard to the classification of the Ophidia. It is only within a few months that M. Dumerit has presented his views of the arrangement of the serpents in a memoir read before the Academy of Sciences, Paris, no copy of which has yet reached this country. Jouy Epwarp Gray, under whose au- spices the valuable series of British Museum Catalogues has been prepared, has likewise omitted the Colubride. Other systematic writers, as Firzrncer, Oppei, Wacter, &c. have, it is true, given us something on this subject; but their arrangement has been 3 either too vague for practical use, or not adapted to the American species. We have had, therefore, no alternative but to recast the whole with the extensive material we had on hand. The characters upon which the genera adopted are founded, as published in the work containing the results of these investiga- tions*, consist of the numbers, shape, and position of the various plates on the head ; the smoothness or carination of the scales ; the division or unity of the most posterior of the abdominal scu- tell, and of those beneath the tail, and some other peculiarities. Owing to the difficulty and expense of procuring skeletons of the genera, we found it impossible, at the time, to derive much assis- tance from osteological characters : subsequent examination of some forms, however, has indicated a very decided harmony between the internal and external characters. It is true that some- times slight variations in the number and shape of the plates and rows of scales were detected, even in different sides of the same individual ; but generally the constancy in character was so re- markable as to lead us to rely quite firmly on this mode of ar- rangement, and to consider the deviations as abnormal conditions, such as are met with in the most constant types. This view is strengthened by the fact that any variation was rarely symme- trical on both sides; one side only varying, as a general rule. Of less rank we found to be the number of longitudinal rows of scales on the back and sides. As, too, in nearly every instance, we found the pattern of coloration to be, with very few exceptions, much the same, in the various species of the same genus, as de- termined by the preceding features, we felt warranted in giving the pattern (not the tint) as a secondary, perhaps tertiary charac- ter, of great convenience in grouping species into genera, or their subdivision. The number of genera into which the 119 species of N. American serpents described in the catalogue are divided is 35, or an average of nearly 3.4 to 1. The 47 species of Dr. Hotproox are divided * Catalogue of North-American Reptiles in the Museum of the Smithsonian In- stitution. Part I. Serpents. By S. F. Barrp and C. Girarp. 8vo. pp. 188. Smith- sonian Institution, Washington, January 1853. 4 among 15 genera, or 3.13 to 1. The 15 species described by Dr. Dexay in the Natural History of the State are arranged in 7 ge- nera, a proportion of 2.14 to 1; or, adding with the sixteenth species of Mr. Grsuarp, an additional genus, we have 2 to 1. It will thus be seen, that instead of a multiplication of genera in our work, their proportional number has actually been diminished. The 17 species of New-York Ophidia, as now given, belong to 14 of the genera of the Smithsonian Catalogue, or a proportion of 1.21 to 1; thus embracing two-fifths of the genera described, al- though the number of species is only one-seventh of those enume- rated as North-American. It is a matter of much interest to find so large a proportion of American genera included within the limits of the State. The generic features will thus become of use in the speedy discrimination of species, as but three of the genera have more than one species to each. To facilitate the appreciation of the generic character of the synopsis, as well as to aid in the determination of species, I have added to the present article two plates containing a view from above and on the side of each one of the seventeen species. All these outlines are entirely original, and in nearly all eases taken from New-York specimens. No. 9, or Scotophis alleghaniensis, 1 have lettered, so as to correspond with the following explanation of terms. All are the size of life, but the numbers 14, 15, 16, 17, which are twice natural size. EXPLANATION OF TERMS USED. Tae vertical plate (v) is the central one in the middle of the head above, having on each side of it the superciliaries (s,s), which form the upper part of the orbit. The two plates behind the vertical are the occipitals (0,0); the pair in front of it, the postfrontals (p,f). The prefrontals or anterior frontals (a,f) are situated in front of the postfrontals; and anterior to these, and terminating the snout, is the rostral (r). The plates immediately in front of the eye are the antcorbitals (a) ; those behind it are the postorbitals (p,o). In advance of the anteorbital is the loral (lo) ; between which and the rostral are the two nasals (7), with the nostril between them. The upper and lower labials (1,1) margin the upper and lower jaws : only one of eacl® series is marked. The temporal shields (¢) are situated between the upper labials and the occipitals. The infra- maxillary or mental scutellz or shields are just within the lower labials : these cannot be shown in the figure. The arrangement on the top of the head of one rostral, two pairs of frontals, one vertical with one superciliary on each side, and one pair of occipitals we have considered as typical or normal, from which but few of the genera described vary. Sometimes one plate occupies the place of the two prefrontals; and in some genera a second median plate is seen between the rostral, frontals and vertical. On the side of the head we have sometimes but one nasal, and some- times either the loral or the anteorbitals may be wanting. Where the latter condition exists, it is sometimes difficult to determine which plate has dis- appeared. A clue is to be found in the shape of the remaining plate : if this be longitudinal, it is probably the loral; if vertical, or divided into two or more, one above the other, it is to be considered as anteorbital. The loral belongs to the postfrontals, and the anteorbital to the vertical, the posterior edges in the former and the anterior in the latter generally ranging. Thus when the vertical plate is very short, the anteorbital is also short or wanting entirely; and the same relation holds good between the loral and postfrontals. Of the five numbers given at the end of the descriptions, the first indicates the number of the abdominal seutelle from chin to anus; the second is that of the pairs of subcaudal scutellee; the third, the dorsal rows, or the number of rows of scales around the body (excluding the abdominal series) : the fourth number shows the entire length of the animal; and the fifth, the length of the tail in english inches. 6 In referring to the dorsal rows, the exterior one, or that next the scutellz, is considered to be the first, unless the contrary is stated. When there are two numbers separated by the symbol (+) at the beginning of the measurements, the first indicates the number of entire abdominal scutelle; the latter, of those that are bifid or divided. The subcaudal scutellz are to be considered as divided or in pairs, unless mentioned to the contrary. In enumerating the number of labial plates, those on one side of the jaws only are to be understood, and the terminal and median one on the symphysis of the upper and lower maxillaries is never included. On the upper jaw, that plate is at the end of the snout, and is the rostral. The descriptions are all based on specimens preserved in alcohol, unless otherwise stated. v. Vertical ; s. Superciliary ; ;'.».(Oecipital 5 pf. Postfrontal ; a,f. Anterior, or Prefrontal ; Rostral ; . nteorbital ; p,o. Postorbital ; n. Nasal; lo. Loral ; 1. Upper labial ; VY’. Lower labial ; t. | Temporal ; m. Mental. The seventeen species of Ophidia hitherto known to inhabit New-York are as follows* : LIST OF SPECIES. I. CroTaLus puRIssus, Linum ...... .. Rattlesnake. 2. CROTALOPHORUS TERGEMINUS, Holbr. Massasauga. 3. ANCISTRODON CONTORTRIX, B.§-G.. Copperhead. 4, Kura@nta saurivTa, B.g G. ....... Striped-snake. 5. . SIRTALIS, B. f G........ . Gartersnake. 6. Neropia sIPepon, B. §-G......... Watersnake. VT. (REGINA LEBERIS, Bod- Gis... 0 Yellowbellied-snake. 8. HETERODON PLATYRHINOS, Latr..... Hognose. 9. ScOTOPHIS ALLEGHANIENSIS, B. §-G. Mountain Blacksnake. 10. OpniBoLus GETuLUS, B. g-G....... Kingsnake. i. i EXIMIUS, Bid Guus oes Housesnake. 12. Bascanion constrictor, B.¢ G... Blacksnake, 13. CHLoROSOMA VERNALIS, B. GG. ... Greensnake. 14. Drapopuis puncratus, B.g-G..... Ringsnake. “ap Po. CELUTA AMGENA, BAG Geiss tines 6s Wormsnake. 16. SroRERIA DEKAYI, B.g-G......... Spotted-snake. i. & OCCIPITO-MACULATA, B... Redbellied-snake. In addition to these, some seven or more species will, im all probability, be hereafter detected in the State : these are, Crotalo- phorus massasauga, Kirtuanp (C. kirtlandii, Hotzroox), in the west ; Nerodia agassizii and Scotophis vulpinus, from the north- west ; Nerodia nigra, from the north ; Heterodon niger and Regina rigida, from the south, and Pityophis melanoleucus from the south- east. * The numbers attached to the species are the same as on the corresponding figures of the plates. 8 The following analytical table will be found to contain, in 4 condensed form, a key to the subsequent classification of genera. SYNOPSIS OF FAMILIES AND GENERA. Family I: Croranipm. Erectible poison fangs, in front; few teeth in upper jaw ; a deep pit on side of face, between the eye and nostril. Family II : Cotusripa. No pit nor poison fangs ; both jaws fully pro- vided with teeth ; no anal appendages. FAMILY I : CROTALIDA. Tail with a rattle with small scale-like plates... CroraLts. ‘ : " with large plates arranged as Top of head covered: +!) “tn @ofuber.:.2<+ccécseeee CRoraLoPHoRvs. f Ma Swat how. ta Vat hhe cs joretats:0 oic\ ota 0 <,cteleisielels alee o)tistele oie ANCISTRODON. FAMILY II : COLUBRIDA. 3 ( entire........ Kurania. ale Three. Postabdominal scutelle o|% e divided....... NERODIA. alec <3) sik ~ Eero] 2 aos GWiOitcislelehe oieieeis HMRC NAL ae tenia a LWOw CAMLCOLDIGAIS. « octee ms