304 -DR. KNUD ANDERSEN ON BATS. [Apr. 7, 



from a single example (skin and skull) obtained at Chichen Itza, 

 Yucatan. The following notes are based partly on Miller's 

 published account, but chiefly on more detailed information, 

 photographs of the skull (uj)per, lateral, and lower views), camera 

 lucida outlines of the molars and the profile of the skull, and 

 measurements of skull and external dimensions kindly given me 

 by Dr. Marcus W. Lyon, Jr., Washington. 



Shull. — General shape quite as in A. t. ravus. Judging from 

 photographs of the type skull of phceotis, I am unable to see 

 any appreciable difference from a series of skulls of ravus, but 

 Miller, who in the original description of phceotis compared its 

 skull with that of ravus, found " the rostrum broader and flatter 

 a,nd the median backwardly extending portion of the bony palate 

 wider." — The measurements, as taken by Dr. Lyon (see table 

 below, p. 309), are practically quite as in ravics. 



Teeth. — The teeth of the type are very much worn down, but 

 from photographs (twice natural size) and camera lucida outlines 

 of the molars it is quite clear that they accord with those of 

 A. toltecus ; cusp 7 of m\is large, as in this latter species. The 

 tooth-rows are somewhat shorter than in A. t. ravus : upper teeth, 

 c-m", 6 mm., according to Dr. Lyon, as against 6*5-7 m.m. in a 

 series of ravus, measured by myself. 



Colour. — Miller describes the colour of the fur as closely 

 similar to that of ^. t. 7Xivus, but the ears are '• much darker and 

 Avithout the whitish border." All the specimens of ravus I have 

 seen have distinct or strong whitish edgings to the ears (see 

 table above, p. 298). 



External dimensions. — I am indebted to Dr. Lyon for measure- 

 ments of the forearm, third digit, first phalanx of fourth digit, 

 -and first phalanx of fifth digit ; they are much as in .^. t. ravus, 

 only the metacarpals would seem to be a trifle longer (see below, 

 p. 309). 



Measurements. — On p. 309. 



Material examined. — Photographs of the type skull. 



Range. — Yucatan ; ? Vera Cruz (see below, p. 305, under 

 " Dermanura jucunda "). 



Remarks. — ^From the available information it appears that 

 A. phceotis is very closely related to A. t. ravus, difiering chiefly 

 in the somewhat shorter tooth-rows and lack of white edgings 

 to the ears. 



A species of Artiheus described below (p. 308) under the name 

 of A . nanus, has like phceotis f molars and cusp 7 of m^ large ; 

 the forearm measures 36*5-38 mm. (in p)hceotis 38), the upper 

 tooth-row 5"8-6*l mm. (in phceotis 6) ; in other words, in the 

 form and number of the teeth and, so far as the length of the 

 forearm is concerned, also in external dimensions, the two species 

 are alike ; further, nanus is known from the Mexican States of 

 Guerrero, Colima, Sinaloa, and Vera Cruz, phceotis from Yucatan 

 and, probably, Vera Cruz, so that the distribution of the species 

 is, partly at least, the same. Some words are therefore necessary 



