Oa new Neotropical Mammals. 269 



XXXV. — Descriptions of new Neotropical Mammals. 

 By Oldfield Thomas. 



]\imj))/roj)s dorsalis, sp. n. 



Like I', irifttscus in size and dentition, but witli a mari^cd 

 dorsal line. 



Size intermediate between the large V. viltalus and the 

 much smaller V. lineatus, apparently about as in V. infuscus. 

 General eolour above dark smoky brown or blackish through- 

 out ; facial lines almost obsolete, a faint indication of the 

 supraorbital ones perceptible. Dorsal line white, prominent, 

 running from the nape to the rump. Under surface dull 

 grey, ))aler than the back. 



Sknll shaped as in the allied species. Incisors §, molars ;'l. 

 Penultimate upper molars square or slightly concave behind, 

 last molars minute. 



Dimensions of the type (measured in skin) : — 



Mead and body ^o millim.; forearm 49; ear (dry) 16. 



t^kull : extreme length 27'5 ; basal length 22'7; greatest 

 breadth IG ; interorbital breadth 6"o ; j)alate length from 

 gnathion 15; breadth outside m." 11"8; front of canine to 

 back of m.- 10'2j front of lower canine to back of m.^ 11'9. 



JIah. Paramba, N. Ecuador. Alt. 1100 m. 



Type. 15.M. no. 99. 12. 5. 1. Collected 14th April, 1899, 

 by K. Miketta. 



In the synopsis of the species of Vampyrops that I gave in 

 1S89 * thi.s bat would be placed with the Peruvian 1'. iufuscus, 

 Peters f, but differs from that species by the presence of a 

 distinct dorsal white line, as in the much smaller V. lineatus. 



Although I still think that in the })resent group the number 

 of the molars is not a character of generic importance, the 

 increase in the number of species known renders it not inad- 

 visable that the genus Vampyrops, as with Artiheas and 

 IStenodermaj should be arranged in subgeneric groups in 

 accordance with the dental formula?. This might be done as 

 follows : — 



A. Molars j|. Subgenus Vampyrops (s. s.). Type V. linea- 

 tvSy Geotf. Other species : vittalas, Pet., infuscus, 

 Pet., zarhinus, II. AH., dorsalis, Thos. 



• Ann. ."t Map. Nat. Hist. {(>) iv. p. 170 (IbfiH). 

 t MD. Ak. Bcrl. i860, p. 209. 



