110. TBOPIDODIPSA8. -"'7 



caudals 51-74. Black, with 16 to 30 white (red), usually black- 

 dotted ai uuli, which may be interrupted <>n the l>clly ; snout and 

 chin black ; throat, and a bar across occiput or nape, white (red). 

 Total length 5i'o millim.; tail 140. 



M \ii-u ami Guatemala. 



A. Most of tho annuli interrupted on the belly. 



a. 2 (V. 170 ; C. 51). Mexico. (One of the types of T. fasciata.) 

 Ixjreal shield entering the eye, between two praeoculare, on one side, 



separated from the eye by the prseoculnrs on the other side. 



b. $ (V. 1!K); C. 50). Ynoaten. 

 Loreal bordering the eye on both sides. 



c. (V. 182 ; C. 56). " ? Zoological Society. 



Loreal shield entering the eye, between two prreoculars, on one side, 



separated from the eye by the prseoculars on the other side. 



B. Annuli all complete. 



d. cJ (V. 181 ; C. 68). Hacienda Cubilgiitz, north F. C. Sarg, Esq. 



of Coban, Vera Paz. [P.]. 



Loreal bordering the eye on both sides. 



e. J (V. 179 ; C. 66). Orizaba. 



Loreal bordering the eye, longitudinally cleft. 



5. Tropidodipsas annulifera. (PLATE XIV. fig. 1.) 



Eye moderate. Rostral a little broader than deep, just visible 

 from above ; internasals half the length of the prtefrontals ; frontal 

 as broad as long, slightly shorter than its distance from the end of 

 the snout, much shorter than the parietals ; loreal once and a half 

 as long as deep, entering the eye ; pnefronfal entering the eye ; no 

 praeocular ; two pbstoculars ; temporals 1 + 2 or 3 ; six or seven 

 upper labials, third or fourth or fourth and fifth entering the eye ; 

 four or five lower labials in contact with the anterior chin-shields, 

 which are once and a half as long as the posterior. Scales smooth, ' 

 in 15 rows. Ventrals 156; anal entire; subcaudals 52. Black, 

 with 20 white (red?) complete annuli, which are broader on the 

 belly than on the back ; throat, and a band across the occiput, white. 



Total length 430 millim. ; tail 90. 



Habitat unknown. 



a. (5 (V. 156 ; C. 62). ? Zoological Society. 



6. Tropidodipsas anthracops. 



Leptognathus anthracops, Cope, Proc. Ac. Philad. 1868, pp. 108 & 

 136. 



Physiognomy of T. sartorii. Frontal longer than broad ; loreal 

 longer than deep, entering the eye ; no pncocular ; two post oculars ; 

 temporals 1 + 2; seven upper labials, fourth and fifth entering the 

 eye, sixth largest. Scales smooth, in 13 rows. Ventrals 177 ; 

 anal entire; subcaudals 76. Black, with yellow rings continuous 

 on the belly, but not on the anterior parts above ; yellow scales 

 black-edged ; temples and nape yellow. 



Total length 480 millim. ; tail 130. 



Nicaragua. 



