306 



REPTILIA: SERPENTES: COLUBRIDAE * "^ TRETANORHINUS 



JRETANnRHINIIS Dumeril, Bibron and Dumeril 



I854 Tretanorhinus Dumlril, Bibron and Dumeril, Erp. Gen., ]i '}i8. Type-species: Tretanorh inus 

 var iabil is Dumeril, Bibron and Dumeril. 



Distribution: Extreme southern Mexico to Colombia and Ecuador; Cuba, Isla Pinos and Caymans in 

 the Antilles. 



Content: Four species, one extralimital ( variabilis , which includes four subspecies, waqleri (jan), 

 i nsulaep inorum Barbour, adnexus Bocourt and var iab i 1 i s Dumeril, Bibron and Dumeril, in the 

 Antilles). 



Key to the species Clave de especies 



1. Three longitudinal stripes dorsally; ventrals 1. Disefio dorsal de tres I'neas long i tud i nales; 



156 or more 2 ventrales 166 mas 2 



Two rows of alternating small dots dorsally Disefio dorsal de dos filas de pequeiios puntos 



(very rarely a single row of large dots); alternados (muy raro una unica fila de puntos 



ventrals I5I or fewei niqroluteus grandes); ventrales I5I menos n igroluteus 



2. Dorsal scales in 21 rows; three prefrontals; 2. Escamas en 21 filas; tres pref rontales; sub- 



subcaudals 7*-81 in females, unknown in caudales en hembras 74-81, desconocido en 



males taen iatus machos taen ia tus 



Dorsal scales in I9 rows; one prefrontal Escamas en I5 filas; una prefrontal (raramente 

 (rarely two); subcaudals 69-/4 in females, dos); subcaudales en hembras 69-74, en 



78-85 in males mocquard i machos 78-85 mocquard i 



TRETANORHINUS N IGROLUTEUS Cope 



1861 Tretanorhinus niqroluteus Cope, Proc. Acad. Nat. Sci. Phila., I86I: 298. Type-locality: Grey- 

 town, Nicaragua (in error, actually Aspinwall, Panama, according to USNM Catalogue). 



Distribution: From Tabasco, Mexico, through Guatemala and Honduras to Panama and Costa Rica. 



Content; Three subspecies. 



Key to the subspecies Clave de subespecies 



1. First and second scale rows dark in color; 1. Primera y segunda fila de escamas de color 



one loreal on each side 2 oscuro; solo una loreal a cada lado 2 



First and second scale rows light in color; Primera y segunda fila de escamas de color 



generally two loreals on each side claro; generalmente dos loreales a cada 



- n igroluteus lado n igroluteus 



2. Three preoculars-- lateral i s 2. Tres preoculares lateral is 



Two preoculars mertens i Dos preoculares mertens i 



Tretanorh inus n i qroluteus n i qrolu teus Cope 



1865 Helicops Aqassizi Jan, Arch. Zool. Anat. Fisiol., 3: 248. Type-locality: San Juan del 

 Norte, Nicaragua. 



1884 Helicops bifrenatus Bocourt. Bull. Soc. Philom., (7) 8: 134. Type-locality: Colon 

 (Aspinweld), Panama. 



1905 Tretanorhinus intermedius Rosen, Ann. Mag. Nat. Hist., (7) 15: 1/1, pi. 12, fig. 2. Type- 

 locality: Central America. 



1939 Tretanorhinus n i qroluteus niqroluteug — Dunn, Copeia, 1935' 216. 



Distribution: Lqw elevations of Caribbean slope from Panama and Costa Rica to extreme 

 eastern Guatemala. 



Tretanorh inus n igroluteus lateral is Bocourt 



I89I Tretanorhinus lateralis Bocourt, Le Naturaliste, (2) 101: 122. Type-locality: Belize, 



British Honduras. 

 1939 Tretanorh inus niqroluteus lateral is — Dunn, Copeia, 1939= 216. 



Distribution: At present definitely known only from British Honduras; probably also elsewhere 

 on Yucatan Peninsula. 



