1908.] DR. KNUD ANDERSEIsr ON BATS. 301 



wanting (see table, p. 298), Whitish ear-edgings strong, or at 

 least distinct. No light tips to the wings. — The shade of colour 

 is not quite the same in all of the eight skins ; some of them 

 evidently show traces of a darker stage, but none are truly 

 intermediate. 



Measurements.— On p. 309. 



Specimens examined. — 12 skins, with skulls, from the following 

 localities : — 



British Museum: — N. Ecuador: Pambilar (3); Corondelet (5). 



U.S. National Museum * ;— N. Ecuador : Pambilar (2) ; 

 Corondelet (2) ; all specimens paratypes of " Dermanura rava." 



Range. — As yet only known from N. Ecuador. 



Miller's Dermanura rava, 1902. — Type locality: San Javier, 

 N. Ecuador. — Miller compared D. rava with D. cinerea {i. e. 

 probably Dobson's description of A. cinerezis, which, however, is 

 taken from examples of A.t. toltecus) and D. tolteca (i. e. A. aztectos 

 of the present paper ; I have seen the actual specimen referred 

 to by Miller, U.S. N. M. no. 52051), and found it differing in the 

 following particulars: smaller, the "colour much paler," "the 

 palatine foramina much more numerous," and persisting " as 

 two conspicuous rows of small perforations even in very old 

 individuals." — The type was collected by G. Fleming ; all the 

 British Museum examples are from the same collector and 

 practically the same locality ; and by the kindness of Mr. Miller 

 and the Authorities of the U.S. National Museum I have had 

 for examination four of his paratypes, so that all doubt as to the 

 identification of D. rava is excluded. 



Miller apparently laid much stress on the pale colour of 

 A. t. ravus, and the four specimens sent from the Washington 

 Museum are, in fact, all light-coloured ; but the British Museum 

 series shows that also a dark phase occurs in perfectly adult 

 individuals. Of twelve skins examined, three must be put aside 

 as being either immature or young adults ; of the remaining 

 nine, one represents the dark phase, eight the light. Taking in 

 consideration that the specimens were obtained in three difierent 

 places in N. Ecuador (between August 10th and October 26th), 

 viz., San Javier, Corondelet, and Pambilar, there seems to be 

 some reason for supposing that this strong preponderance of 

 light-coloured individuals is not quite accidental ; it may be that a 

 majority of adult individuals of this form are light-coloured. It 

 has been mentioned above (p. 299) that so far as the development 

 of the facial stripes is concerned, there is much the same difierence 

 between the northern A. t. toltecits and the southern A. t. ravtts 

 as between the northern and southern races of A. jainaicensis ; 

 if it proves true that a majority of individuals of A. t. ravtis 

 are light-coloured, there is another parallelism to A. jamaicensis; 

 as pointed out above (p. 256) 77 p. ct. of individuals of the 

 southern races of jamaicensis are light coloured, as against only 



* U.S. N. M. nos. 113333-34, 113337, 113339. 



