& 



-i05 



On new JSeotropical Mammals. 269 



XXXV. — Descriptions of new Neotropical Mammals, 

 By Oldfield Thomas. 



Vampyrops dorsalis, sp. n. 



Like V. infuscus in size cancl dentition, but with a marked 

 dorsal line. 



Size intermediate between the large V. vittatus and the 

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

 General colour 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, paler than the back. 



Skull shaped as in the allied species. Incisors |, molars §. 

 Penultimate upper molars square or slightly concave behind, 

 last molars minute. 



Dimensions of the type (measured in skin) : — 



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



Skull : extreme length 27*5 ; basal length 22*7 ; greatest 

 breadth IG ; interorbital breadth 6'o ; palate length from 

 gnathion 15; breadth outside ni.' 11'8; front of canine to 

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



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



Type. B.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 

 lb89 * this bat would be placed with the Peruvian V. in/uscus, 

 Peters f, but difters 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 present 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 Artibeus and 

 Stenoderma, should be arranged in subgeneric groups in 

 accordance with the dental formulae. This might be done as 

 follows ; — 



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

 tus, Geoff. Other species : vittatus, Pet., infuscus, 

 Pet., zarhinus, H. All., dorsalis, Thos. 



* Ann. & Mag. Nat. Hist. (6) iv. p. 170 (1889). 

 t MB. Ak. Berl. 1880, p. 259. 



