128 



REPTILIA: SERPEN TES: COLUBRIDAE "^ * "^ "^ HYDROMORPHUS 



HYDROMORPHUS Peters 



1855 Hydromorphus Peters, Monats. Akad. Wiss. Berlin, 1855= 276. Type-species: Hydromorphus concolor 

 Peters. 



Distribution: Costa Rica and Panama. 



Content; Three species, according to most recent review of genus, by Nelson, Texas Jour. Sc i . , 

 18, 1566, 365-371. 



Key to the species Clave de especies 



1. Dorsal pigmentation extending to ends of 1. Pigmentacion dorsal se extiende al extreme de 



ventrals; anterior temporal excluded from los ventrales; temporal anterior excluido de 



orb it 2 la orbita 2 



Dorsal pigmentation ends on third scale row, Pigmentacion dorsal tormina en la tercera 

 ventral color begins at that level; anterior hilera de escamas, color ventral empieza a ese 

 temporal enters orbit below single postoculai — nivel; temporal anterior entra la orbita 

 clarl< i debajo del unico postoculai dark i 



2. Three prefrontals; scales in I5 rows at mid- 2. Ires pref rontales; escamas en I5 hileras al 



body dunn i medio del cuerpo dunn i 



One prefrontal; scales in I7 rows at midbody Un prefrontal; escamas en I7 hileras al medio 



concolor del cuerpo concolor 



HYDROMORPHUS CLARK I Dunn 



15*2 Hydromorphus dark i Dunn, Notulae Naturae, Acad. Nat. Sci. Phila., 108: 2. Type-locality: Agua 



Clara village, near Chagres River, Panama. 

 1566 Hydromorphus dark i — Nelson, Texas Jour. Sci., 18: 368. 



Distribution: Known only from type-locality. 



HYDROMORPHUS CONCOLOR Peters 



I855 Hydromorphus c oncolor Peters, Monats. Akad. Wiss. Berlin, 1855= 277j text-fig. J, Type-locality: 



Costa R i ca. 

 1566 Hydromorphus concolor — Nelson, Texas Jour. Sci., 18: 3^8, figs. 2-3, 5-5' 



Distribution: Honduras and Costa Rica; not yet recorded from Nicaragua. 



HYDROMORPHUS DUNN! Slevin 



1542 Hydromorphus dunni Slevin, Proc. Calif. Acad. Sci., 23: A74. Type-locality: Vicinity north of 



Boquete, Provincia ChiriquT, Panama, 38OO ft. 

 1366 Hydromorphus dunn i — Nelson, Texas Jour. Sci., Ig: J&l , fig. 4- 



Distribution: Known only from type locality. 



