204 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 69 



extend to near the inner base of the ears and a shorter lateral pair 

 normally reach upward from near the corners of the mouth. In the 

 possession of these markings and the absence of a dorsal stripe 

 Artibcus agrees with Vampyressa, but the ears are more pointed 

 and the disparity in size externally distinguishes the two genera. 

 Moreover, the skulls differ rather widely in detail ; the upper incisors 

 are bifid in both genera, but while about as broad as high in Artibcus 

 they are much higher than broad in Vampyressa. Some of the teeth 

 are vestigial and may be absent in certain species, the number for the 

 genus varying from 28 to 30 or 32. 



ARTIBEUS WATSONI Thomas 



Watson's Bat 

 Artibcus watsoni Thomas, Ann. Mag. Nat. Hist., Ser. 7, Vol. 7, p. 542, June, 

 1901. Type from Bugaba, Chiriqui, Panama. 



Watson's bat may be distinguished from its Panama congeners 

 by much smaller size and more distinct white facial stripes. The 

 forearm measures about 40 millimeters. The edges of the ears are 

 yellowish, much as in Uroderma bilobatum and Vampyrops hclleri. 

 The known range of the species is Panama and Nicaragua. Several 

 similarly small and apparently not very distinctly related species 

 inhabit northern South America. 



At Gatun a single individual was found clinging to the under side 

 of a banana leaf in an old field. The only other specimen obtained 

 by me was knocked down near the entrance to the tunnel of an old 

 mine at Cana. 



Thomas (1903a, p. 40), the original describer of the species, re- 

 corded additional specimens from Sevilla and Cebaco, both small 

 islands off the southern coast of western Panama. The same 

 material was examined by Andersen (1908, p. 289) and listed in his 

 monograph of the genus. Six specimens, collected by J. H. Batty 

 at Boqueron, were recorded by Allen (1904, p. 79) ; six specimens 

 from Chepigana are listed by Anthony ( 1916, p. 373) . 



Specimens examined : Boqueron, 6 ' ; Cana, 1 ; Chepigana, 6 1 ; 

 Gatun, 1. 



ARTIBEUS JAMAICENSIS JAMAICENSIS Leach 

 Jamaican Bat 

 Artibcus jamaicensis Leach, Trans. Linn. Soc, Vol. 13, 1821, p. 75. Type 

 from Jamaica. 



The Jamaican bat is doubtless common at the lower elevations 

 throughout Panama. It is a large robust species with rather indis- 



1 Collection Amer. Mus. Nat. Hist. 



