292 NEW SPECIES OF BAT ALLEN. 



show that the smaller size of the specimen, as well as the difiterence 

 of coloration of the new form, as compared with the old, were not due 

 to age.* 



As a result of this examination, I venture to describe the single ex- 

 ample as a type of a new species in the following language : 



Carollia castanea sp. nov. 



Smaller than C. brevicauda. Fur long and silky. Above, lustrous 

 light chestnut-brown at basal one-half and at the tip. The intervening 

 portion is yellow brown (old gold). Below, the same colors prevail, ex- 

 cepting that over the abdomen and pubis the brownish tip is absent and 

 the body of the hair not golden. There is uo hair on the forearm (the 

 parts are slightly rubbed), and scarcely any on the dorsum of the meta- 

 carpal bone of the thumb. The distribution of the hair on the wing 

 membrane is as in C brevicaurlaA 



The general form of the auricle as in C. hreiiicauda, but is proportion- 

 ately longer. The outer border is more emarginate. When the auricle 

 is laid on the head, it reaches a point as far as the end of the muzzle. 

 The tragus is obscurely acuminate; the inner border, therefore, not 

 straight, but the apical half abruptly narrowed. The outer border cren- 

 ulate rather than pectinate. The basal lobe and the process above it 

 well developed. The nose-leaf is more delicate than in C. brevicauda. 

 The height is 7"""; the breadth 4^°"". The lower border is much more 

 distinct than in G. brevicauda. The nostrils are rounded, well defined^ 

 and not continuous with a concavity on the outer border.f The warts 

 on the mentum are arranged in three obscurely disposed rows, the mid- 

 dle one being the larger, but none of them are elongate. The tail reaches 

 to a point opposite the knee. 



SkuU. — The general proportions of the skull are the same in the two 

 species. The brain case at the ])rocephalon is inflated and the temporal 

 crest does not extend over the inflated part. Hence the impressions 



* The teeth were all erupted, the epiphyses of theradii, metacarpals, and phalanges 

 were united to their shafts, but the tibia was slightly flexible and the foot was 

 covered by a looser skin than is seen in matured individuals. It is not always easy 

 to determine the age of bats. 



t The fur of C. brevicauda is described as follows : 



Above, moderately long only. The base is plumbeous, the tip brown, and the inter- 

 mediate part pallid — almost white. Below, the fur is short, plumbeous at basal half, 

 and of the peculiar mouse-gray so often seen in Phyllostomidre. G. E. Dobson (Cat. 

 Chir. Br. Mus., 1878, describes the fur as brown above and beneath. None of the nine 

 specimens examined were so marked. The brown aspect of the animal as seen in spirit 

 is much more apparent than when dried. The nose-leaf is covered with fine short 

 hairs on both sides. The back of the thumb is densely covered with short hair in 

 C. brevicauda. 



jThe nostrils are oval in outline, are not separable from the outline of the nose- 

 leaf above, and are continuous with a concavity (as one speaks of the mouth of a 

 pitcher being concave) on the outer border. The peculiarity just named is best seen 

 by holding the specimen so as to keep the vertex of the head upward and looking 

 downward from the tip to the base of the nose-leaf. 



