1908.] DR. KNUD ANDERSEN ON BATS. 279 



ever that the latter race is the truly indigenous form in the 

 region north of Panama, and that A. j. palmarum is a late 

 intruder from south into the same region. This point will be 

 further discussed in the "General Remarks," below p. 317. 



Size. — In the table of measurements p. 282, the specimens 

 examined have been arranged in four sections, viz. individuals 

 from (1) Venezuela, (2) Trinidad and St. Vincent Islands, 

 (3) Central America, and (4) S. Mexico. The table shows that 

 measm-ements of individuals from these four areas are identical. 

 The four specimens from S. Mexico (Oaxaca, Vera Cruz, Jalisco) 

 do not show the extremes of individual variation in size ; hence 

 the average measurements are not given. 



Sjjecimens examined. — 47 specimens (26 skins) and 32 skulls, 

 from the following localities : — 



British Museum : — Trinidad (4). — St. Vincent Island (1). — 

 Venezuela : Caripe (1) ; Tachira (1) ; " Venezuela " (1). — Panama : 

 Bogava, Chiiiqui, 250 m. (4). — Costa Rica : San Jose (3) ; Los 

 Cuadros, S. Pedro (1) ; Costa Rica (2). — Nicaragua: Matagalpa 

 (1). — Guatemala: Dueiias (4) ; Cahaban(l). — "Central America" 

 (1). — Jalisco : Huajimic, Tepic (1). — 18 skulls, from all the localities 

 enumerated. 



U.S. National Museum* : — Trinidad (1). — Venezuela: Macuto, 

 La Guaira (12). — Costa Rica : San Jose (3). — Nicaragua : Escon- 

 dido River, 50 miles from Bluefields (1). — Guatemala: Peten (1). 

 — Oaxaca: Santo Domingo (2). — Vera Cruz: Mirador (1). — 14 

 skulls, representing all these localities. 



Range. — Venezuela, including Trinidad and St. Vincent Islands, 

 through Central America, to Vera Cruz and Jalisco, Mexico. 



Allen and Chapman's A. palmarum, 1897. — In 1893 (l.s.c), 

 Allen and Chapman recorded an '■'■Artiheus sp. nov.V (skin with- 

 out skull) from Trinidad ; it differed " in coloration and in the 

 distribution of the fur on the wing-membranes from any of 

 the currently recognised species of Artiheus ;" forearm 63, third 

 metacarpal 61, tibia 25*4 mm.; "color above and below light 

 bi'own, much lighter on the head and anterior half of the body, 

 the hairs nowhei'e tipped with gray ; a broad white stripe above 

 and a faint whitish line below each eye." 



The same specimen, together with six others, also from Trinidad, 

 formed, in 1897 {l.s.c), the basis for Allen and Chapman's 

 A. palma7-um: — " Fi-om true Artiheus perspicillatus" the authors 

 wi'ite, " the present species differs notably in colour, particularly 

 in the presence of two prominent broad white head stripes, and 

 two narrower and shoi'ter whitish cheek stripes. It is also very 

 much larger, the forearm measuring 68 mm. against 56 in true 

 persjjlcillatus, with all the other dimensions proportionately 

 larger. The skull is much more massive, at least one-third 



* U.S. N. M. uos.:— 6973 (37809), 7222, 13778, 13809 (37551), 51571, 73257-58, 

 101331, 102843, 102845-46, 102855-56, 102860-62, 102873-74, 102877, 102879, 

 103964. 



