1908.] DR. KNUD ANDERSEN ON BATS. 241 



stated to be '' vier auf jeder Seite " ; if this is correct, the bat is 

 J-.j. lituratus. But three points make me hesitate to draw this 

 conclusion : — first, Prince Maximilian describes the incisors and 

 canines of Ph. obscurum tolerably well, but passes very lightly 

 over the molars ; if his examination of these latter has been 

 similarly cursory, he may very easily, indeed, have oveilooked the 

 rudimentary m^ : second, the length of the head and body is 

 stated to be " 3" " ; it would seem to be too small for an A. j. 

 liticrattis, but would agree very well with A. p. planirostris : 

 third, he describes in the same book a "jPA. superciliaticm," also 

 from Rio de Janeiro, which probably is A. j. lituratus, and it 

 might seem rather unlikely that he has described, a few pages 

 later, a specimen of the same form as Ph. obscurum ; this latter 

 argument is, however, rather weak ; the possibility is not quite 

 excluded that Ph. superciliat'um might be the light " phase," 

 Ph. obscurum the dark " phase " of one species ; but the other 

 evidence speaks against this assumption. Only a re-examination 

 of the type of Ph. obscurutn, if it still exists, can place the identi- 

 fication beyond doubt, 



Arttbeus planirostris trinitatis K. And. 



1893. Artiheus planirostris Spix, Thomas, Jouni. Trinidad Field Nat. Club, i. no. 7, 



p. 6 (April 1893).— Trinidad. 

 1897. Artiheus planirostris Spix, J. A. Allen & Chapman, Bull. Am. Mus. N. H. 



ix. Art-, ii. p. 15 (26 Feb. 1897).— Trinidad. 

 1906. Artiheus planirostris trinitatis Knud Andersen, Ann. & Mag. N. H. (7) xviii. 



p. 420 (1 Dec. 1906;.- Type locality: Trinidad. 



Diagnosis. — Similar to A. jo. 2}lccnirostris, but averaging smaller, 

 with slightly smaller skull and teeth. 



A. p. ti^initatis and jilanirostris. — A. p. trinitatis can only be 

 discriminated from its nearest relative, A. p. planirost7-is, by 

 average charactei-s. In A. p. trinitatis the forearm and meta- 

 carpals average about 4 mm., the tibia 1"5 mm. shorter ; the ears 

 are, generally, a little smaller ; the average difierence in the size 

 of the skull and teeth is very small. For further details see table 

 of raeasurements, below p. 246. 



Specimens examined. — 13 specimens (6 skins) and 9 skulls, from 

 the following localities : — 



British Museum : — Trinidad (5), — Tobago (2). — 5 skulls, repre- 

 senting both localities. 



U.S. National Museum * :— Trinidad (6).— 4 skulls. 



Range. — The islands of Trinidad and Tobago, W.I. 



Artibeus planirostris grenadensis K. And. 



1906. Artiheus planirostris (/renadensis Knud Andersen, Aim. & Mag. N. H (7) 

 xviii. p. 420 (1 Dec. 1906).— Type locality; Grenada, W.I. 



Diagnosis. — In the size of the skull and teeth very similar to 



* U.S. N. M. uos. 101898-99 104016, 104018, 104022-23. 



16* 



