18. ISCHNOGNAXHUS. 287 



Storeria dekavi, liaird ^- Gir. Cat. N. Am. liept. p. 135 (1853) ; 

 Garm. N. Am. liept. p. 31, pi. i. fig. 1 (1883), and Hull. Essex- 

 List, xxiv. 1892, p. 105 ; //. Gann. Bull. lUin. Lab. iii. 1892, 

 p. 278. 



Iscliuoguathus dekayi, part, Bum. Sf Bihr. vii. p. 507 (1854). 



Storeria tropica, Cope, Proc. Am. Philos. Soc. xxii. 1885, p. 175. 



delcavi, var. anomala, Duges, Proc. U.S. Nat. Mus. xi. 



1888, p. 9, tig. 



Rostral broader than deep, visible from above ; nasal divided, in 

 contact with the pneocular ; intcrnasals broader than long, much 

 shorter than the pncfrontals ; frontal about once and a lialf as 

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

 shorter than the parictals ; one (rare two) praj- and two post- 

 oculars ; temporals 1 + 1 or 1 + 2; seven (rarely six) upper 

 labials, third and fourth entering the eye ; four lower labials in 

 contact with the anterior chin-shields ; posterior chin-shields as 

 long as the anterior and usually in contact with each other in front. 

 Scales in 17 rows, all keeled. Yentrals 120-145 ; anal divided ; 

 subcaudals 40-63. Pale olive-bro^vn, greyish or reddish above, 

 with or without a lighter vertebral stripe and two dorsal series of 

 small black spots ; crown of head often blackish ; a blackish 

 transverse blotch on each side of the nape ; frequently a black spot 

 below the eye; ventrals yellowish, usually with black dots on the 

 sides. 



Total length 370 millim. ; tail 75. 



North and Central America, from Canada to Guatemala. 



a. 2 (Y. 127 ; C. 48). Canada. Chatham Museum [P.]. 



b-d. 2 (V. 128, 125 ; C. Bloomington, In- C. Bollmau, Esq. fC.]. 



40, ?) & hgr. (V. 120 ; diaua. 



C. 43). 



e. 2 (V. 138 ; C. 46). Illinois. Smithsonian Instit. [P.]. 



/. (S (V. 135 ; C. 03). New Orleans. M. SaRS [C.l. 



ff-k. (S (V. 126; C. 51) & Texas. 



2 (V. 137, 137, 139; 



C. 50, 51, 47). 



I, m. c? (V. 136; C. 55) Duval Co., Texas. W. Taylor, Esq. rC.I. 



& 2 (V. 132 ; C. 56). 



M. 2 (V. 136; C. 47). Guatemala. 0. Salvia, Esq. [C.]. 



3. Ischnognathus occipitomaculatus. 



Coluber occipitomaculatus, Storer, Hep. Fish. S,- JRept. Mass. p '^30 



(1839). 

 venustus, Hallow. Proc. Ac. Philad. 1847, p. 278, pi. — and 



1849, p. 245. 

 Storeria occipitomaculata, Baird ^- Gir. Cat. N. Am. JRept. p. 137 



(1853); Baird, Serp. of N. York, p. 26 (1854) ; Gar7n. N. Am. 



Pept. p. 30, pi. i. fig. 2 (1883) ; H. Garm. Bidl. lllin. Lab. iii. 



1892, p. 278. 

 Isehuognathus dekayi, part., Dum. ^- Bibr. vii. p. 507 (1854). 



occipitouiaculatu.s, Gilnth. Cat. p. 81 (1858) ; Jan, Arch. 



Zool. Anat. Phijs. iii. 1805, p. 240, and Icon, Gen. 30, pi. i. fio- 2 

 (1868). ° 



