150 BULLETIN 18 7, UNITED STATES NATIONAL MUSEUM 



Dark bands on body less tlian 30 in known specimens, sometimes broken 

 and indistinct posteriorly ; dorsal keels weak 4 



4. Head rather elongate; ej'e larger, its diameter nearly or quite twice its 



distance from labial border ; posterior chin shields nearly or quite half 



as long as anterior chin shields or longer 7 



Head short ; eye small, its diameter about equal to its distance from 

 labial border ; posterior chin shields very short, about one-fourth length 

 of anterior chin shields, or less 5 



5. Ventrals 199 ; dark body rings 27 ; dark tail rings 9 macdougalli 



Ventrals 185 or less, dark body rings 24 or less, dark tail rings 8 or less 6 



6. Light bands, including nuchal collar, yellow in life; bands very regular, 



all complete about body and tail, 14 to 18 on body ; ventrals 173 in a 



male, 175 to 181 in 3 females sartorii annulatus 



Light body bands rod or orange, only nuchal collar yellow in life; 

 bands variable, usually at least some incomplete on ventral surface, 

 13 to 24 on body; ventrals 176 to 185 in 4 males, 176 to 183 in 5 

 females sartorii sartorii 



7. Ventrals 171 to 17G ; eye perhaps smaller ; posterior chin shields nearly as 



large as anterior ; body not compressed fasciata 



Ventrals 184 to 198 ; eye larger, its diameter fully twice its distance from 

 labial border; posterior chin shields about half size of anterior; body 

 somewhat compressed guerreroensis 



TROPIDODIPSAS FASCIATA Gunther 



Tropidodlpsas fasciata GtJNTHER, Catalogue of the snakes in the British Museum, 



1858, p. 181 (part) ; Biologia Centrali-Americana, Rept., 1894, p. 139, pi. 50, 



fig. B (in color).''' — Stuaet, Proc. Biol. Soc. Washington, vol. 55, 1942, pp. 



178-179.— Smith, Journ. Washington Acad. Sci., vol. 33, 1943, p. 373. 

 Leptognathus fasciatus Sumicheast, Bull. Soc. Zool. France, vol. 5, 1880, p. 184. — 



Cope, U. S. Nat. Mus. Bull., 32, 1887. p. 67. 

 Leptognatlvas subannulatus Mullek. Verb. Nat. Ges. Basel, vol. 8, 1887, pp. 274- 



275, pi. 1, fig. 5 (type locality, Mexico; type in Basel Mus.). 

 Cochliophagns torvieri Muller, Mitt. Zool. Mus. Berlin, vol. 11, 1923, p. 92 (type 



locality, "South America" [in error?] ; type, Berlin Mus. No. 8162). — Amaeal, 



Mem. Inst. Butantan, vol. 4, 1929, p. 32. 



Type. — Brit. Mus. Nat. Hist., five cotypes only three of which belong 

 to this species (Boulenger, Catalogue of the snakes in the British 

 Museum, vol. 2, 1894, pp. 295, 297). 



Type locality. — Mexico. 



Range. — The only definite localities known are Chichen Itza and 

 Yohdzonot, Yucatan; other records, from Cordoba, Jicaltepec, and 

 San Andres Tuxtla, Veracruz., are possibly valid. 



♦TROPIDODIPSAS FISCHERI Boulenger 



Virginia fasciata Fischer, Jahrb. Hamburg Wiss. Anst., vol, 2, 1885, pp. 95-97 (a 



homonym of Tropidodlpsas fasciata Giinther, 1858). 

 Tropidoclonium annulatMm Bocouet, Le Naturaliste, ser. 2, No. 126, 1892, p. 132 



(type locality, Volcan Atitlan, Guatemala ; type in Paris Mus.) (a homonym 



of Geophis annulatus Peters, 1870 [c/. T. s. anmilatus]). 



" The rings shown as red probably should be gray or -white. 



