180 FIELD MUSEUM or NATURAL HISTORY ZOOLOGY, VOL. X. 



of his great toe. He made light of it and said he had often had the 

 same experience. The wound healed quickly and caused only slight 

 inconvenience. Later, one of our porters or cargueros was bitten on 

 the same spot, the great toe, while sleeping in the open air during the 

 journey from Moyobamba to Balsapuerto. 



Amorphochilus schnabli Peters. 



Two specimens, Hacienda Limon, near Balsas. 



Since the publication of the original description of this rare bat 

 by Peters in 1877, no additional records of it have appeared. Its 

 rarity in collections is perhaps due to its habit, as observed by us, of 

 flying at an hour when humans usually are asleep. The two individuals 

 obtained were taken on separate occasions but in each case the hour 

 was approximately three in the morning. Happening to awaken at 

 that time, we heard them flying about our room and quickly closing the 

 doors made them prisoners. 



These specimens agree closely with the excellent description and 

 figures published by Peters. The greatest discrepancy is in. the color, 

 which he gives as dark cinnamon brown. In a dry skin unaffected by 

 preservative the color of the upper parts is dark smoke gray tinged with 

 drab, the hairs being long (8-10 mm.), soft, and at their bases mouse 

 gray. The under parts are practically the same color as the back and 

 about the muzzle there is a tinge of brownish, perhaps extraneous. 



The form of the skull in general is very similar to that of Furipterus; 

 braincase slightly higher and narrower but palate broader, especially 

 anteriorly; rostrum slightly longer and broader with lachrymals more 

 expanded. In our specimen the braincase is relatively lower than in 

 the figures published by Peters. Consequently the distinction drawn 

 by Miller in his key to the genera of Furipteridae 1 does not hold, the 

 ratio between the height and length of the braincase being practically 

 the same in the two genera (see measurements). The teeth show 

 numerous slight departures from those of Furipterus. The outer upper 

 incisor is separated from the canine by a much greater space, about 

 equalling the basal length of the canine. The upper canine has its 

 posterior cutting edge entire and with only slight concavity toward the 

 tip; its cingulum is scarcely developed, the conspicuous anterior and 

 posterior cusps of Furipterus being absent. The posterior upper pre- 

 molar has only a slight indication of an inner cusp. The upper molars 



1 Families and Genera of Bats, p. 188, 1907. 



