292 



COLUBRIB^. 



cylindrical ; scales striated and keeled, wifcli apical pits, in 19 rows ; 

 ventrals rounded. Tail moderate or ratter long ; subcaudals in 

 two rows. Hypapophyses developed throughout the vertebral 

 column. 



Central America : North-western South America. 



Synopsis of the Species. 



Subcaudals 75-101 ; five or six upper 



labials 1. diadematus, p. 292, 



Subcaudals 100 ; seven upper labials, pos- 

 terior keeled 2. labiosus, p. 293. 



Subcaudals 37-67 ; seven or eight upper 



labials 3. atratus, p. 293 



<!_ 



1. Streptophorus diadematus. 



Ninia diademata, Baird ^ Oir. Cat. N. Am. Rept. p. 49 (1853) ; 



Cope, Proc. Ac. Philad. 1860, p. 340. 

 Streptophorus bifasciatus, Dmn. 8f Bibr. vii. p. 520 (1854) ; Giinth. 



Cat. p. 16 (1858; ; Cope, Proc. Ac. Philad. 1860, p. 77 ; Jan, Arch. 



Zool. Anat. Phys. ii. 1863, p. 26, and Icon. 04n. 12, pi. iii. fig. 3 



(1865) ; Booourt, Miss. Sc. Mex., Pept. p. 545, pi. xxxii. fig. 10 



(1883). 



Eostral about once and a haK as broad as deep, visible from 

 above ; internasals and supraoculars small ; frontal as broad as 

 long, as long as its distance from the end of the snout, shorter than 

 the parietals ; loreal once and a half to twice as long as deep ; two 

 postooulars ; temporals l-|-2 or 24-3 ; six (exceptionally five) upper 

 labials, third and fourth entering the eye, sixth longest ; four lower 

 labials in contact with the anterior chin-shields ; posterior chin- 

 shields small. Scales in 19 rows, all strongly keeled. Ventrals 

 136-156 ; anal entire ; subcaudals 75-1 01. Dark brown or 

 blackish grey above, usually with a light spot on each of the outer 

 scales ; upper lip and occiput yellowish ; the yellowish collar may 

 be interrupted in the median line ; belly and lower surface of tail 

 yellowish, with three longitudinal series of large black spots, or 

 black with a light border to each shield. 



Total length 415 miUim. ; tail 125. 



Mexico. 



a. $ (V. 142 ; 0. 83). 

 b-e. S (V. 140, 148; C. 



96, 101) & $ (V. 156, 



150; 0.84,75). 

 /. Hgr. S (V. 137 ; 0. 



92). 



g-h. Hgr. 3 (V. 140, 147 ; 

 C. 87, 97). 



Mexico. 



Huatuzoo, Vera Cruz. 



Teapa, Tabasco. 



Oaxaca. 



M. SaI16 [C], 



F. D. Godman & O. 



Salvin, Esqrs. [P.]. 



Mr.H.H.8mith[0.]. 



F.D. Godman &0. 



Salvin, Esqrs. [P.l 

 Mr. Hoege [0.]. 



