130 OPHIDIA. 
4, Leptophis depressirostris. 
Philothamnus depressirostris, Cope, Proc. Ac. N. Sc. Phil. 1861, p. 557. 
Hab. Panama, Cocuyas de Veraguas (Mus. Acad. Phil.). 
5. Leptophis saturatus. 
Leptophis saturatus, Cope, Journ. Ac. N. Sc. Phil. viii. p. 183, t. 28. fig. 10 (1875) (head). 
Hapsidophrys saturatus, Cope, Bull. U.S. Nat. Mus. no. 32, p. 69. 
Hab. Nicaraeva (Cope); Costa Rica (Gadd). 
I have not seen a specimen of this species. 
6. Leptophis diplotropis. 
Ahetulla diplotropis, Giinth. Ann. & Mag. N. H. 1872, ix. p. 25, t. 6. fig. A. 
Hab. Muxico, Tres Marias Is. and Presidio in Western Mexico (forrer), Amula in 
Guerrero (H. H. Smith), Tehuantepec (Sumichrast), Santo Domingo de Guzman, 
and La Laguna in the Sierra de Alica (A. C. Buller). 
7. Leptophis prestans. 
Thrasops prestans, Cope, Proc. Ac. N. Sc. Phil. 1868, p. 309. 
Leptophis prestans, Cope, Journ. Ac. N. Sc. Phil. viii. p. 133 (1875). 
Thrasops (Ahetulla) sargii, Fisch. Wiegm. Archiv, 1881, p. 229, t. 11. figg. 7-9. 
Hab. Mexico, Amula in Guerrero, Teapa in Tabasco (H. H. Smith) ; British HonpDuRas, 
Stann Creek (Rev. J. Robertson); Guatemaua, Peten (Cope), Coban (Sarg) ; Costa 
Rica (Gadd). 
The number of postoculars varies from 2 to 4, and that of the upper labials from 8 
to 9; generally only the fifth, seventh, or ninth middle series of scales are keeled, the 
keels (structure) passing into mere black lines (colour). 
8. Leptophis bilineatus. 
Diplotropis bilineata, Ginth. Ann. & Mag. N. H. 1872, ix. p. 24, t. 6. fig. B. 
Leptophis bilineatus, Cope, Bull. U.S. Nat. Mus. no. 82, p. 69. 
Hab. Mexico, Tehuantepec (Swmichrast); Nicaracua (Cope); Costa Rica (Mus. Brit.). 
9, Leptophis zruginosus. 
Leptophis eruginosus, Cope, Journ. Ac. N. Sc. Phil. viii. p. 182, t. 28. fig. 9 (1875). 
Hab. Costa Rica (Gadd). 
Founded upon a young specimen, which may possibly be the young of the preceding 
species. 
