84 Lyon New Phyllostone Bat from Isthmus of Panama. 



darker than the drab-gray of Ridgway. Side of head marked by a pair 

 of white bands, the upper band extending from the posterior outer edge 

 of the nose-leaf over eye nearly to posterior edge of ear; the lower ex 

 tending from angle of mouth almost to tragus. A fine white line less 

 prominent than the face markings extends along middle of back. 



Length of fur on middle of back about 5 mm., below, 3-4 mm. 



Nose-leaf and ears as in Uroderma bilobatum. The nose-leaf appears 

 smaller, but the specimen had been placed in formalin and afterwards 

 dried before reaching the Museum. The rims of the ears and the mar 

 gins of the attached portions of the nose-leaf are whitish; the ears and 

 nose-leaf themselves as well as the wing membranes are blackish brown. 



Skull and teeth essentially as in Uroderma bilobatum. The tooth-rows 

 of Uroderma convexum are decidedly convex and arcuate, and less nearly 

 parallel than those of U. bilobatum. All the teeth in U. convexum are a 

 trifle larger than the corresponding teeth in U. bilobatum; most conspic 

 uous are the greater widths of the upper premolars and molars, es 

 pecially the last molars. That portion of the palate posterior to the 

 last molar is decidedly shorter and narrower in U. convexum than in U. 

 bilobatum. The rostrum of the Panama bat is a trifle shorter and wider 

 than in the Brazilian specimen and the nasals are flattened instead of 

 being slightly pinched up. The sagittal crest is about the same size in 

 each species, but in U. bilobatum it divides anteriorly into two prominent 

 lateral ridges, each of which terminates in a more or less prominent 

 postorbital process; while in U. convexum these two ridges are lacking 

 and the postorbital processes but little marked. This may be partly due 

 to difference in age as the Panama specimen is somewhat younger. 



Measurements of the type, and of No. 4883 Acad. Nat. Sci. Phila., 

 from Chapada, Brazil: forearm, 43 (42); longest finger, 92 (92); tibia, 16 

 (15); foot, 10 (10.4); calcar, 5 (5); nose-leaf from tip of lance to lower 

 edge of rounded lobe just above lip, 9.4 (11); greatest width of lance, 4 

 (5); greatest width of rounded portion of nose-leaf, 5 (6); height of ear 

 from notch in front of antitragus, 9 (10 ; greatest width of ear, 8 (9); 

 greatest length of skull, 23.4 (24); greatest width of skull, zygomatic, 

 13 (about 13); front of incisors to posterior edge of palate, 11.4 (12.4); 

 length of palate posterior to last molars, 2.6 (3.4); front of upper canine 

 alveolus to posterior edge of last upper molar, 8 (8); greatest width 

 between outer surfaces of upper molars at alveoli, 9.6 (9.2); greatest 

 length of mandible 15 (15.6); front of lower canine at alveolus to pos 

 terior edge of last molar 8.4 (9.2). 



Remarks. Uroderma convexum is closely related to U. bilobatum and is 

 the only other known species of the genus as restricted by Rehn.* 



The two cannot be distinguished by external characters alone, unless 

 there should prove to be color differences. The two specimens from 

 Brazil, in alcohol, are too worn and bleached for making useful compari 

 sons. The species is based upon two specimens in alcohol, an adult fe 

 male the type, and another female of adult size, but young, No. 111,721. 



*Proc. Acad. Nat. Sci. Phila. (1900) p. 757, February 9, 1901. 



