1908.] DR. KNUD ANDERSEN ON BATS. 303 



SO that the only, apparently reliable, difference between the two 

 species is the denser hairing of the interfemoral and tibia in 

 A. toltecus. 



Dobson's Artibeus quadrivittatus. — Dobson's description of 

 A. qiuidrivittatus (1. s. c.) may be epitomised in the following four 

 sentences : — First, it is " very similar to ^. cinereus [i. e. A. toltecus 

 toltecus], but the nose-leaf is narrower and not so abruptly 

 narrowed at the summit " ; Dobson gives as breadth of the nose- 

 leaf in A. quadrivittatus 0""25, in "^i. cinereus " 0"'28, making a 

 difference of only 0"*02 or 0'5 mm. ; considering the not in- 

 conspicuous variation in the breadth of the nose-leaf in all other 

 species, it would, a j^Tiori, appear highly improbable that such a 

 small difference would prove to be reliable ; and as a matter 

 of fact there is no difference at all in this respect between 

 A. t. toltecus K,Ta.d A. quadrivittatus; in the former the lancet is 

 5"5-6"6 mm. broad, in the only alcoholic specimen I have seen 

 of the latter (also examined by Dobson) 6 mm. ; also the shape 

 of the lancet is the same in the two species. Second, " inter- 

 femoral membrane much deeper " ; this is only correct, if for 

 "much "we substitute "on an average somewhat." Thu^d, the 

 upper surface of the interfemoral " thinly clothed with fine 

 hairs," ; this is correct (but there is no corresponding character 

 in Dobson's description of his A. cinereus). Fourth, " the head 

 with foiu- longitudinal, not very distinct, white streaks, arranged 

 as va. A. perspicillatus [i. e. A. jamaicensis lituratusy , whereas in 

 his A. cinereits \A. t. toltecus] there are " no white streaks on the 

 face '* ; but the character is (as might be expected) individually 

 variable in both species (as it also is, more or less, in other forms 

 of the genus) ; in ^. t. toltecus the facial stripes are, as a rule, 

 wanting or rather indistinct, but specimens occur in which they 

 are well developed, and, on the other hand, of three examples of 

 A. quadrivittatus two have the facial stripes rather indistinct, 

 one strong. — This perusal of Dobson's descrij)tion, based on the 

 same material as examined by him, leads to the same result as 

 emphasised above : there is, probably, an average difference in the 

 length of the interfemoral, and an apparently well-marked 

 difference in the hairing of this membrane and the tibia, but I 

 am unable to find any other chai-acter by which these two ex- 

 tremely closely related species can be discriminated from each 

 other. 



Artibeus ph^otis MiUer. 



1902. Dermanura p7i(eotis Gerrit S. Miller, Jr., Proc. Acad. N. Sci. Philad. p. 405 



(12 Sept. 1902).— Type locality : Yucatan. 

 1906. ? Dermanura jucwndum D.G.Elliot, Proc. Biol. Soc. Wash. xix. p. 50 (1 May, 



1906).— Type locality : Vera Cruz. 



Diagnosis. — Similar to A. toltecus ravus, but with somewhat 

 shorter tooth-i"ows, and no whitish edgings to the ears. Forearm 

 about 38 mm. ; third metacarpal about 37 mm. 



I have not seen this species, which was described by Miller 

 Proc. Zool. Soc— 1908, No. XX. 20 



