54 ^Jr. K. Andersen on the Bats of the 



tlie forearm varies betv^cen 31 8 and 802 ram., in meilcana 

 between 35"2 and 38 ; in the southern form the average is 

 34" 4, in the northern 36. The metacarpals are shorter : in 

 the southern form the third metacarpal measures 25'8-29'8 

 mm., in niexicana 2!>-3"2"7. — In every other respect (in- 

 cluding the colour of the fur) the two races are alike. 



Specimens examined. — 32, from the fnljo wing localities: — 

 Pereque, S. Paulo (2); Sumidouro, Minas Gcraes (1); 

 S. Lorenzo, Pernambuco (2) ; Chapada, Matto Grosso (2) ; 

 R. Jurua, Amazonas (2) ; R. Perene, Junin, Peru (2) ; 

 Kanuku Mts., B. Guiana (7) ; S. Esteban, Venezuela (2) ; 

 Trinidad (2) ; Tobago (4) ; " Brazil " or uncertain localities 

 (6). — 18 skulls, from practically all the localities enumerated. 



Range. — From S. Brazil and Peru, through Guiana and 

 E. Venezuela, to Trinidad and Tobago. 



1 b. Micronycteris meyalotis niexicana, Miller. 



18'JS. Micrmiifderis nier/cilotis me.vieamis, Gerrit S. Miller, Proc. Ac. 

 Nat. Sci. Piiil. 18!)S, pt. ii. pp. 329-31 ; Nov. 8, 1898.— Type : $ ad., 

 in alcohol ; Plantinar, Jalisco, Mexico ; U.S. Nat, Mus. — Separated 

 by Miller on accuuut of its lunger wing. 



Subspecific characters. — Tooth-rows longer. Forearm and 

 metacarpals longer. 



Details. — See the typical lace, above. 



Specimens examined. — 1 1, from : — Bogota region, Colombia 

 (6); Duenas, Guatemala (2) ; Bay of Honduras (Ij ; ]Sle.\ico 

 (2). — 9 skulls, from all the localities enumerated. 



Range. — From Bogota, throtigh Central America, to 

 Mexico. 



Remarks. — The examples recorded by !Mr. iAliller were 

 from various places in S. ^Mexico (Oajaca, Colima, Jalisco) ; 

 the British Museum material shows that this laigcr race 

 has a much wider distribution. Judging from the series 

 available, it would seem that it reaches its climax (/, e. its 

 maximum size) in Central America. 



Truly intermediate specimens between the soutlu^rn race 

 and mexicana I have not seen ; but three skins from 

 Maipure, Orinoco, thus from a border region between the 

 areas of the two races, are perhaps intermediate in external 

 dimensions (forearm 35-35-8 mm. ; third metacarpal 287- 

 28"8) ; the skull of one of the individuals is, however, quite 

 pronounced mexicana (tipper teeth 7'8 nnn.) ; the two other 

 skulls have been lost. 



