296 

 TANTILLA 



TANTILLA MEX ICANA (Cunther) 



1862 Elapomorphus mex icana Gunther, Ann. Mag. Nat. Hist., (3) 9= 51 > Pl- 9> ^ '9- !• Type-locality; 



Mex i CO. 

 I883 |_ Homalocran ion melanocephalum j var. fuscum Bocourt, Miss. Sc i . Mex., Rept.: 589' Type-locality: 



Guatemala . 

 19^2 Tantilla mexicana — Smith, Zoologica, 2]: 37- 



Distribution: Moderate elevations on Pacific slope from Chiapas, Mexico, to Guatemala. 



TANTILLA MOESTA (Gunther) 



1863 Homalocran ium moestum Gunther, Ann. Mag. Nat. Hist., (3) 12: 352- Type-locality: El Peten, 



Guatemala. 

 1866 Tantilla moesta — Cope, Proc. Acad. Nat. Sci. Phila., 1866: 126. 



Distribution: Lowlands of Yucatan Peninsula south to central El Peten, Guatemala. 



TANTILLA NIGRA (Soulenger) 



1914 Homalocran Ium n iqrum Boulenger, Proc. Zool. Soc. London, 1914: 8I6, pi. 2, figs. 2-2a. 



Type-locality: Choco of Colombia. 

 1929 Tantilla nigra — Amaral, Mem. Inst. Butantan, 4: 221. 



Distribution: Choco of Colombia. 



TANTILLA RETICULATA Cope 



I860 T[ antilla ] reticulata Cope. Proc. Acad. Nat. Sci. Phila., 1860: ]]. Type-locality: Cocuyas de 

 Veragua, "New Grenada". 



Distribution: Costa Rica; Institute Butantan has one specimen identified as this species from Rfo 

 San Juan, Colombia. 



TANTILLA RUFICEPS (Cope) 



I894 Poqonaspis ruficeps Cope, Proc. Acad. Nat. Sci. Phila., 1894: 204. Type-locality: Costa Rica. 

 1929 Tantilla ruficeps — Amaral, Mem. Inst. Butantan, 4: 221. 



Distribution: Still known only from type specimen. 



TANTILLA SCHISTOSA (Bocourt) 



1883 Homalocran ion schlstosum Bocourt. Miss. Sci. Mex., Rept.: 584, pi. 36, figs. 10-lOe. Type- 

 locality: Alta Verapaz, Guatemala, and Mexico. Restricted to Alta Verapaz, Guatemala, by 

 Smith, Zoologica, 2/, 1942, 39. 



1942 [ Tantilla ] schistosa — Smith, Zoologica, 2]: 39. 



Distribution: Mexico to Costa Rica. 



Content: Four subspecies, one ( phren it ica Smith) ex tral im i tal . 



Key to the subspecies Clave de subespecies 



1. More than 121 ventrals 2 1. Mas de 121 ventrales 2 



Fewer than 120 ventrals taylori Menos de 120 ventrales taylori 



2. Males w i th fewer than I36 ventrals; ventrals 2. Machos con menos de I36 ventrales; hembras 



plus caudals fewer than I69 in females menos de I69 ventrales totales (ventrales 



3Ch i stosa mas cau dales) sch i stosa 



Males with more than I37 ventrals; ventrals Machos con mas de 13/ ventrales; hembras 



plus caudals more than I72 In females con mas de 1/2 ventrales totales (ven- 



costar Icens is trales mas caudales) costar icens i s 



