1879.] ^* 1 [Cope. 



Ophidia. 



33. Stenostoma phcenops Cope, Journal Academy Philadelphia, 1875, p. 

 128. 



34. Loxocemus bicolor Cope. 



35. Ceagras redimitus Cope, Journal Academy Phila., 1875, p. 141. 

 30. Ficimia olivacea Gray. 



37. Tantilla rubra Cope, loc. sup. cit. 144. 



38. Conophis sumichrasti Cope, loc. cit. 137. 



39. Coniophanes proterops Cope, 1. c. 138. 



40. Coniophanes jissidens Gthr. 1. c. 138. 



41. Spilotes corais melanurus D. and B. 



42. Bascanium mentovorium D. and B. 



43. Leptopliis diplotropis Gthr. 



44. Dryopltis fulgidus Daud. 



45. Himantodes cenchoa L. 



46. Oxyrrhopus delta L. 



Kemarks. 



This catalogue represents a part of the Mexican fauna properly so-called. 

 There is not a single non -Neotropical genus excepting liana and Basca- 

 nium. Of the remaining thirty genera, fifteen are characteristically Neo- 

 tropical ; twelve are peculiarly Mexican, two are cosmopolitan or nearly so, 

 and one (Celestus) is West Indian. 



IV. Costa Rica, Zeledon. 



This collection includes a number of species which I have named in my 

 monograph on the Herpetology of Costa Rica,* with some additional ones. 

 I now give the names of the latter only, enumerating them from the end of 

 my former list. 



3. (Edipus morio Cope. Inserted in the essay above cited as doubtfully 

 occurring in Costa Rica. From Cartago on the Plateau. 



45. Coleonyx elegansGray. Inserted in my list on the authority of Peters. 

 Zeledon's collection contains fine specimens, which he states were found 

 in ant hills on the table land near San Jose. 



131. Scolecophis zonatus Hallow. 



132. Coluber triaspis Cope. The Plateau near San Jose. The most 

 southern locality for this species and genus. 



133. Porthidium nasutum Bocourt. 



From Limon, on the East Coast. This species is very near the BotJi- 

 riopsis proboseideus Cope, and may not prove to be distinct from it. In 

 the latter there are two nasal plates, the supranasals are longer, more con- 

 cave on the external edge, and more widely separated than in P. nasutum, 

 and the frontal scales are carinate. They are smooth, or nearly so, in Mr. 

 Zeledon's specimen, which also has the rostral plate a little shorter than 

 in the B. proboseideus. The specimens of the latter are smaller than the 

 single P. nasutum. It is questionable whether a large series will sustain 



♦Journal Academy Philadelphia, 1875, 93. 



