1908.] DR. KNUD ANDERSEX OX BATS. 265 



As already pointed out above, A. j. yticataitlcits is similar 

 to A.j. parvi])es and jamaicensis in every respect but a small 

 average difference in size ; in the size of the skull and teeth it 

 comes extremely near to the former race, in external dimen- 

 sions it is indistinguishable from the latter. A.j. yidcatanicas 

 therefoi-e, cannot be considered a distinct species ; it forms, in 

 its chai-acters as in its geographical habitat, a transition between 

 the two races, and is in some cases practically inseparable from 

 either. 



Artibeus jamaicensis jamaicensis Leach. 



1821. Artibeus Jamaicensis Leach, Trans. Linn. Soc. xiii. pt. i. y. 75 (read 7 Marcli, 



1820).— Type locality : Jamaica. 

 1821. Madat(?us Leivisii Leach, t. c. pp. 81-82. — Type locality; Jamaica. 

 1851. Artibeus carpolegus Gosse, A Naturalist's Sojourn in Jamaica, pp. 271, 272 



(footnote), pi. vi. fig. 5. — Type locality : Jamaica. 

 1861. Arctibeus verspiciUattis (not L.) Tomes, P. Z. S. (26 Feb. 1861) p. 64-.— 



Jamaica (W. Osburn's specimens). 

 1865. Arctibeus carpolegus Gosse, W. Osburn, P. Z. S. (24 Jan. 1865) pp. 64-67.— 



Jamaica (habits). 

 1865. Arctibeus Jamaicensis Leach, Peters, MB. Akad. Berlin (13 July 186-5), 



p. 356. 

 1878. Artibeus perspiciUatus (partim, not L.) Dobson, Cat. Chir. Brit. Mus. 



pp. 519-20. — Jamaica, S. Doming-o, Mexico, Central America (partim). 



1889. Dermanura eva Coj)e, American Naturalist, vol. xxiii. no. 266, p. 130 (Feb. 



1889).— Type locality: St. Martins, W.I. 



1890. Artibeus coryi J. A. Allen, Bull. Am. Mus. N. H. iii. no. i. p. 173, of. 



pp. 171-72 (11 Nov. 1890).— Type locality: St. Andrew's I. 

 1896. Artibeus perspicillatus (not L.) Elliot, Field Col. Mus., Zool. Ser. vol. i. 



no. 3, p. 82 (May 189G).— San Domingo, VV.L 

 1902. Artibetis intermedins J. A. Allen (partim), Outram Bangs, Bull. Mus. Comp. 



Zool. xxxix. no. 2, p. 50 (April 1902). — Bogava, Chiriqui (the smaller 



specimens). 

 1904. Artibeus insularis J. A. Allen, Bull. Am. Mus. N.H. xx. Art. 20, pp. 231- 



32 (29 June, 1904).— Type locality : St. Kitts, W.I. 



Diagnosis. — Similar to A. j. yucatanicus^ but the skull, on 

 average, a little lai'ger and more heavily built, the teeth a little 

 larger. Zygomatic width 16" 2- 18" 2 mm. (average 17 "4) ; maxillary 

 tooth-row 9'8-ll mm. (average 10"3) ; forearm 56"5-65 mm. 

 (average 60*1). 



General charactei's.— The angular emargination between cusps 

 5 and 7 of m" (reminiscent of the missing m^) is in 75 p. ct. of 

 the large number of skulls examined as strongly pronounced as 

 in any of those species (A. concolor, j^ianirosiris, hirsutios) which 

 possess an m** ; in only about 20 p. ct. it is distinctly reduced in 

 size, and in 4 or 5 p. ct. it has almost disappeared. The colora- 

 tion of the fur of the upper side of the body is generally of the 

 dark type, even in individuals witb somewhat worn teeth ; 

 specimens of the light colour type are rare among full-grown 

 individuals with unworn teeth, become rather more common 

 among those with somewhat woi-n teeth, and appear to be pre- 

 dominant among those with much worn teeth. The supraorbital 

 stripes are almost always undeveloped or faint, rarely distinct, 

 never (so far as the available mateiial goes) very strong ; the 

 infi'aorbital stripes are always undeveloped or faint. 



A. j. jamaicensis and closely allied forms. — ^N^eitherin structure 



