238 



REPTILIA: SERPENTES: COLUBRIDAE * "At PAROXYRHOPUS 



PAROXYRHOPUS Schenkel 



1500 Paroxyrhopus Schenkel, Verh. Naturforsch. Ges. Basel, 13' I68. Type-species; ParoxyrhoDus 

 ret iculatus Schenkel. 



Distribution: Southern Brazil, Paraguay, Colombia, 



Content: Two species. 



Key to the species Clave de especies 



1. Two postoculars; supraocular not turned down 1. Dos postoculares; supraocular no contorneando 



behind orbit; unicolor dorsally, sides atras y hacia abajo la orbita; dorsalmente 



variegated with small spots or reddish coloi — unicolor, lados variegados con pequeflas man- 



undula tus chas en color rojizo undula tus 



One postocular; supraocular has downward pro- Una postocular; supraocular con una extension 



jecting extension behind orbit; dorsum with que proyecta atras y hacia abajo de la orbita; 



large, brownish-black spots ret iculatus dorso con grandes manchas pardo negras 



ret icula tus 



PAROXYRHOPUS UNDULATUS (Jensen), new combination 



1900 Oxyrhopus undulatus Jensen. Vidensk. Medd. Naturhist. Foren. K jobenhavn, I899 (19OO): 106, fig. 2. 



Type-locality: Lagoa Santa, Minas Gerais, Brazil. 

 1913 Oxyrhopus lat ifrontal is Werner. Mitt. Naturhist. Mus. Hamburg, 3''' 3*^- Type-locality: Eastern 



part of Estado de Minas Gerias, Brazil. 

 1923 Paroxyrhopus a tropurpureus Amaral, Proc. New England Zool. Club, 8: 9"' Type-locality: Nova 



Baden, Estado do Minas Gerais, Brazil. 

 1929 Paroxyrhopus lat i frontal is — Amaral, Mem. Inst. Butantan, 4: 208. 



Distribution: Mato Grosso, Sao Paulo, Minas Gerais, and Goias, Brazil; Institute Butantan, Sao 

 Paulo, Brazil, has a specimen identified as this species from Amazonian Colombia. 



Comment: Dr. Joseph R. Bailey has pointed out this prior name for the species called Paroxyrhopus 

 lat ifrontal is by earlier authors. He also thinks it likely that the two species are not 

 distinguishable, but we retain both at this time. 



PAROXYRHOPUS RET ICULATUS Schenkel 



1900 Paroxyrhopus ret iculatus Schenkel, Verh. Naturforsch. Ges. Basel, I3: l69> 'figs. 5'5^' Type- 

 locality: Bemalcue, Paraguay. 



Distribution: Paraguay. 



