28o COLTJBEID^. 



iSi/noj^sis of the Sj:iecies. 



I. Anal divided. 



Scales in 19 rows ; a loreal and one 



pra3ocular 1. Icirilandii, p. 28G. 



Scales in 17 rows ; praeocular one, in 



contact with nasal 2. dela>/i, p. 286. 



Scales in 15 rows; pracoculars two, 



in contact with nasal 3. oceiintomaculatus, p. 287. 



Scales in 15 rows ; a loreal and two 



prseoculars 4. storerioides, p. 288. 



II. Anal entire. 



Scales in 15 rows ; no loreal 5. cojni, p. 289. 



Scales in 17 or 19 rows ; a loreal . . 6, lineatiis, p. 289. 



1. Isclinognathus kirtlandii. 



Regina kirtlandii, Kennicott, Proc. Ac. Philad. 1856, p. 95 ; S. 



Garm. Bull. Illin. Lah. iii. 1892, p. 275. 

 Tropidoclonion Jdrtiandii, Cope, Proc. Ac. Philad. 18G0, p. 340. 

 Iscbuognathus kirtlandi, Jan, Arch. Zool. Anat. Phys. iii. 1865, 



p. 239, and Icon. Gen. 30, pi. i. tig. 1 (1868). 

 Tropidonotus kirtlandii, Garm. N. Am. Rept. p. 28, j)l. i. fig. 3 



(1883). 

 Clonophis kirtlandii. Cope, Proc. U.S. Nat. Mas. xi. 1889, p. 391. 



Eostral broader than deep, just visible from above ; nasal divided ; 

 a loreal ; intern asals broader than long ; frontal once and a half as 

 long as broad, longer than its distance from the end of the snout, 

 shoi'ter than the parietals ; one praj- and two postoculars ; tem- 

 porals 1 + 1 or 1 + 2 ; six (exceptionally five) upper labials, third and 

 fourth (or second and third) entering the eye ; two pairs of chin- 

 shields, posterior separated from each other. Scales in 19 rows, all 

 very strongly keeled. Ventrals 129-133 ; anal divided ; sub- 

 caudals 50-59. Greyish brown above, on each side with a series 

 of large black spots and alternating series of smaller spots ; head 

 dark brown, with lighter vermiculatious ; labials yellowish ; ventrals 

 5'ellowish, with a black spot at each outer end. 



Total length 430 millira. ; tail 90. 



United States, from Illinois to Ohio. 



a-b. $ (V. 129, 133 ; C. 51, ?). Illinois. Prof. S. A. Forbes [P.]. 



,^[(-^^2. Ischnognathus dekayi. 



Coluber ordinatus {non L.), Storer, Rep. Fish. 4'- Rept. Mass. p. 223 



(1839). 

 Tropidonotus dekavi, Holbr. N. Am. Ilerp. iv. p. 53, pi. xiv. (1842) ; 



Bekcn/, N. York Faun., Rept. p. 46, pi. xiv. fig. 30 (1842)._ 

 Iscliuoguathus dekayi, Bum. Sf Bibr. Mem. Ac. Sc. xxiii. 1853, 



p. 468; Giintli. Cat. p. 81 (1858); Jan, Arch. Zool. Anat. Phys. 



iii. 1865; p. 240, ami Icon. Gen. 30, pi. i. tigs. 3 & 4 (1868). 



