42 BULLETIN : MUSEUM OF COMPARATIVE ZOOLOGY. 



brown below, with a narrow facial stripe on each side from near the posterior base 

 of the nose leaf to the ear. The forearm measurements of three of these specimens 

 are 65, 70, 71-5 mm., respectively, or a trifle larger than that given for the type 

 (65 mm.). The hair is nearly uniform in color to the base instead of having 

 lighter bases as in A. jamaicensis and A. planirostris. 



Artibeus palmarum Allen and Chapman. 



This is a distinctly larger species than intermedins, without the bluish cast to 

 the fur; it also seems to be decidedly more of a russet when adult. No. 10,471, 

 adult female from Bogaba, Panama, is the specimen referred to as A. intermedins 

 in Bull. Mus. Comp. Zool., 1902, vol. 39, p. 50, but a comparison with Costa Ricau 

 specimens shows that it is not that species. No doubt the range of A. palmarum 

 is more southern, from Panama eastward along the northern coast of South Amer- 

 ica. The type specimen of A. femur -villosum Bangs is also in the Museum collec- 

 tion, and as pointed out by Dr. J. A. Allen (Bull. Amer. Mus. Nat. Hist., 1900, 

 vol. 13, p. 89), is clearly A. palmarum as at present understood. This specimen is 

 from La Concepcion, Colombia, and the name might therefore be applicable to the 

 continental form, should it prove eventually to be distinct from that of Trinidad. 

 The difference in size between A. palmarum and A. intermedins may be inferred 

 from the fact that the third metacarpal of three specimens (from Bogaba, Panama, 

 and La Concepcion, Colombia) averages 66.6 (65-6S.S), as against 62.7 (62-66) 

 for four Costa Rican A. intermedins. Unfortunately the forearms are broken in the 

 skius of two of our adult palmarum. In one from Panama, however, this bone is 

 entire and measures about 77 mm. 



THYROPTERIDAE. 

 Thyroptera albiventer (Tomes). 



The status of this species has hitherto been doubtful, and Miller in his recent 

 synopsis of the genera of bats (Bull. 57, U. S. Nat. Mus., 1907, p. 192) says that 

 but " two species are now recognized," viz., T. tricolor of Brazil, and T. discifera 

 of northern South America and Central America. The same writer in a previous 

 paper (Proc. Biol. Soc. Washington, 1896, vol. 10, p. 109-112) summarized the 

 characters wherein the four described species are supposed to differ, but through 

 a lack of specimens was unable to determine the validity of any but T. discifera. 

 The Museum collection contains a mounted specimen (No. 6277) of this genus 

 from " Ecuador " that appears to be T. albiventer of Tomes, whose type came from 

 the Rio Napo, near Quito, Ecuador. It differs from T. discifera, its probable 

 nearest ally, in the color of the fur, which is about a Vandyke brown dorsally, but 

 below, that of the chin, throat, and central parts of the chest and abdomen is 

 whitish throughout, while that of the sides is a light Vandyke brown basally, with 

 whitish tips. In a specimen of T. discifera from San Julian, Venezuela, the entire 

 pelage is Vandyke brown, not darker at the bases of the hairs, while in our speci- 



