191 



MASTIGODRYAS 



12. Upper lateral light stripe on scale rows four 



and five only 13 



Upper lateral light stripe on scale rows three, 

 four and five amaral i 



13. More than 110 subcaudals lA 



Fewer than 110 subcaudals melanoloinus 



14. Upper light stripe without border 15 



Upper light stripe with prominent dark bordei 



boddaert i 



15. Lateral light stripes prominent boddaert i 



Lateral light stripes obscure melanolomus 



12.Cinta clara lateral superior en hileras de 



escamas cuatro y cinco solamente 13 



Cinta clara lateral superior en hileras de 

 escamas tres, cuatro y cinco amaral i 



13. Mas de 110 subcaudales 14 



Menos de 110 subcaudales melanolomus 



14. Cinta clara superior sin borde 15 



Cinta clara superior con borde oscuro promi- 

 nent e boddaert i 



IJ.Cintas Claras laterales prominentes boddaert i 



Cintas Claras laterales confusas melanolomus 



MASTIGODRYAS AMARAL I (Stuart), new combination 

 plee i group 



1938 Eudrvas amarali Stuart. Copeia, 1538: ?• Type-locality: Margarita Island, Venezuela. 

 1541 Dryadophis amarali — Stuart, Misc. Publ. Mus. Zool. Univ. Mich., 45; 57, pi. 3, fig. 3. 



1966 Drvadoph i s amaral i — Roze, La Taxonom'a y Zoogeograf fa de Los Of idios en Venezuela; II6, Map 24. 



Distribution: Margarita Island and dry areas in northeastern Venezuela; Tobago Island. 



MAST IGODRYAS BIFOSSATUS (Raddi), new combination 

 b i f ossa tus group 



1820 Coluber bifossatus Raddi. Mem. Soc. Italiana Sc i . Modena, 18: 333. Type-locality: Rio de 

 Jane i ro, Braz i 1. 



1939 Dryadophis [ b i fossa tus j— Stuart . Copeia, I939: 55. 



Distribution: From northern South America in Venezuela and Colombia to southern Brazil, Bolivia, 

 Paraguay and northeastern Argentina. 



Content: Four subspecies; three according to latest revision by Stuart, Misc. Publ. Mus. Zool. 

 Univ. Mich., 1941, 49, and one described by Hoge, 1952. 



Key to the subspecies 



1. Body pattern of less than 48 constricted, 



broad, dark crossbands, or series of dark 

 dorsal and lateral blotches; total ven- 

 trals less than 2/8 2 



Body pattern of 5O-62 continuous dark 

 crossbands; total ventrals more than 2/6 — 

 str i atus 



2. Body pattern of dark crossbands unbroken 



laterally 3 



Body pattern of series of dark, dorsal 

 blotches separated from lateral series of 

 similar blotches tr iser iatus 



3. Broad crossbands, with lateral constriction 



but at least four scale rows wide at mid- 

 do rsum b if ossatus 



Crossbands triangular, very constricted 

 middorsally, never more than two scale 

 rows wide at middorsum v i llela i 



Clave de subespecies 



1. Diseflo de bandas transversas anchas, 



oscuras y constreT i das, en numero menor 

 de 48, series de manchas oscuras dor- 

 sales y laterales; ventrales totales menos 



de 278 2 



Diseno de bandas transversas angostas, con- 

 tfnuas y oscuras; en numero mayor de 49; 

 ventrales totales m^s de 278 str iatus 



2. DisePlo de bandas transversas oscuras, no 



interrumpidas lateralmente- 3 



Oisefio de series de manchas oscuras doi — 

 sales, separadas de series laterales simi- 

 lares tr iser iatus 



3. Anchas bandas transversas con constriccion 



lateral, por lo menos de cuatro escamas de 



ancho en el medio dorso b if ossatus 



Bandas transversas triangulares, muy cons— 

 trefiidas medio dorsalmente, donde nunca 



alcanzan mas de dos escamas de ancho 



v I llela i 



