1908.] DR. KNUD ANDERSEN ON BATS. 237 



first character (molars |) excludes all species, except A. concolor 

 and hirsi'jtios ; the addition of the second and third charactei-s 

 (large skull and teeth, large external dimensions) excludes A . con- 

 color ; the addition of the fourth and fifth (tibia and distal inter- 

 femoral almost naked, general colour of fur of upper side not drab) 

 exclude also A. hirsiotus. 



Forms. — Four races of A. 2)l(i'nirost>-is are described below: 

 A. p. planirostris, trinitatis, grenadensis, and fallax. The three 

 former come very near to each other, the fourth is rather more 

 completely differentiated, but cannot be specifically separated. 



Artibeus planirostris planirostris Spix. 



1823. Phyllostoma planirosfre Spix, Simiarum et Vespertilionum Brasiliensiuni 



spenies novje, p. 66, pi. xxxvi. fig. 1. — Bahia. 

 1826. ? Phyllostoma obscurum Wied, Beitr. Natnrg. Bras. ii. pp. 203-205. — Rio 



de Janeiro. 

 1840. Phyllostoma perspicUlatmn (pavtim, iiec L.) Wagner, Schreber's Saugtliiere. 



Suppl. i. pp. 403-405. — Re-description of Spix's type of Ph. planirostre. 

 1865. Phyllostoma planirostre Spix, jPeters, MB. Akad. Berlin, p. 587. — Spix's 



type of Ph. planirostre re-examined. 

 1878. Artih BUS planirostris Spix (partim), Dobson, Cat. Chir. Brit. Mus. pp. 515-517. 

 1901. Artibeus planirostris Spix, Robinson & Lj'on, Proc. U.S. Nat. Mus. xxiv. 



p. 148. — La Guaira, Venezuela (specimens examined). 

 1904. Artibeus intermeclius All. (errore), J. A. Allen, Bull. Am. Mus. N. H. xx. 



Art. iv. p. 79 (29 Pebr. 1904) ; cf. Allen, t. c. Art. xx. p. 233 (29 June 



1904).— Chiriqui. 

 1904. Artibeus planirostris Spix, Thomas, P. Z. S. 1903, ii. p. 234 (1 April 1904). 



— Chapada, Matto Grosso (specimen examined). 



Diagnosis. — Total length of skull 27"5-30 mm. (average 28'5 

 mm.); zygomatic width 16"8-18'5 mm. (average 17'6 mm.); 

 for-earm 57'8-65"2 mm. (average 61*8 mm.). 



A . -p. •planirostris and trinitatis. — A . p. planirostris can only be 

 discriminated from its nearest relative, A . p. trinitatis, by average 

 characters. In A. p. planirostris the forearm and metacarpals 

 average about 4 mm., the tibia 1'5 mm. longer; the ears are, 

 generally, a little larger ; the average diflierence in the size of the 

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

 p. 246. 



Specimens from different localities. — In the subjoined com- 

 parative table of measurements (p. 240) I have divided the material 

 examined into three groups, viz. specimens from Brazil, Venezuela, 

 and S. Mexico. The table shows that the size of the skull a,nd 

 teeth and the external dimensions are identical in individuals 

 from these three regions. 



Specimens examined. — 26 specimens (12 skins) and 20 skulls, 

 from the following localities : — 



British Museum : — Brazil : Chapada, Matto Grosso, 700-900 m. 

 (1); Pernambuco (2); S. Lourengo, Pernambuco, 28-60 m. (8); 

 Igarape, Assii, Para, 50 m. (2); "Brazil" (1).— 10 skulls, from 

 all the localities enumerated. 



U.S. National Museum * : — Brazil : Bahia (1) ; Anilo, Maranhao 



* U.S. N. M. nos. 100201, 100203, 102457, 102894-96, 104565, 104567-69 104574 

 126554. 



