2O2 Bulletin American Museum of Natural History. [Vol. XI I r 



each i ; Bonda 3 ; Masinga Veija (500 feet), 3 ; Minca r 

 (1000-2000 feet), 5. It is readily distinguishable from either H. 

 anomalus or H. melanoleucus by its decidedly paler coloration^ 

 which is even more strongly shown by the young in first pelage 

 than in the adults. The young of H.jesupi is grayish brown ; of 

 H. anomalus blackish brown. The similarity in size between the 

 three South American species is shown in the following table of 

 measurements. It should be noted that measurements of H~ 

 jesupi are all from females, and should be compared with those 

 of the females of the other two species. From this comparison 

 it is evident that H.jesupi is rather larger than either H. anomalus 

 or H. melanoleucus. 



NOTE ON Heteromys melanoleucus GRAY. The small collection 

 of mammals recently received from Mr. F. W. Urich, of Port-of- 

 Spain, Trinidad, contained, among others of much interest, 31 

 specimens of Heteromys melanoleucus Gray (Proc. Zool. Soc. Lon- 

 don, 1868, 204). Of these 23 were collected at Los Palmales, and 

 the others at the nearby locality Quebrada Secca, in the moun- 

 tains about 90 miles south of Cumana, at an altitude of about 3000 

 feet, in December, 1898. 



Gray gave the habitat of his H. melanoleucus as " Honduras," 

 but, as shown by Mr. E. R. Alston, incorrectly, the specimen on 

 which it was based having been sent by Dyson from Venezuela. 1 

 The exact locality of the specimen is not known, but is presum- 

 ably near the coast in northern Venezuela. 



As shown by the measurements given above, the external di- 

 mensions agree very closely with those of H. anomalus from 

 Trinidad. There is practically also no difference in color, but 

 the well made skins give the impression of a much stouter 

 animal. This is well substantiated by the skulls, which are very 



1 Ann. and Mag. Nat. Hist. (5) VI, 1880, 118 ; Bioi. Centr.-Am., Mamm., 167. 



