ij83 COLtTBEIDiE. 



Synopsis of the Species. 



I. Anal divided. 



Scales in 19 rows ; a loreal and one 



prseocular 1. hirilandii, p. 286. 



Scales in 17 rows ; prseocular one, in 



contact with nasal 2. delcayi, p. 286. 



Scales in 15 rows ; prasoculars two, 



in contact with nasal 3. oecipitomaculatus, 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. cojiii, p. 289. 



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



1. Isclinognathus Mrtlandii, 



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



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

 'Tropidoclonion Jrirtiandii, Cope, Proc. Ac. Philad. 1860, p. 340. 

 Isclinogiiathus kirtlandi, Jan, Arch. Zool. Anat. Phys. iii. 1866, 



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

 Tropidonotus kirtlandii, Garm. N. Am. Mept. p. 28, pi. i. fig. 3 



(1883J. 

 Clonophis kirtlandii. Cope, Proc. U.S. Nat. Mug. 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, 

 shorter than the parietals ; one prse- 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 #om 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 vermioulations ; labials yellowish ; ventrals 

 yellowish, with a black spot at each outer end. 



Total length 430 millim. ; tail 90. 



United States, from Illinois to Ohio. 



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



2. Ischnognatlius dekayi. 



Coluber ordinatus {iion L.), Storer, Hep. Fish. 8f Eept. Mass. p. 223 



(1839). 

 Tropidonotus dekayi, Solbr. N. Am. Herp. iv. p. 63, pi. xiv. (1842) ; , 



Dehay, N. York Faun., Rept. p. 46, pi. xiv. fig. 30 (1842). 

 Ischnognathus dekayi, Dum. ^ JBibr. M^m. Ac. 8c. xxiii. 1853, 



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



iii. 1865; p. 240, and Icon. GSn. 30, pi. i. figs. 3 & 4 (1868). 



