Oct., 1916. Mammats, Cottins-Day ExpepITION—Oscoop. 213 
Skull with the facial region relatively short and the palate short and 
wide; teeth slightly smaller than in A. toltecus ravus, first upper molar 
reduced in size, especially as compared with the second which it exceeds 
only slightly. 
Measurements. Type: Head and body 45; hind foot 10; pollex 
with claw 7; forearm 35; third metacarpal 32.7; fourth metacarpal 32.3; 
fifth metacarpal 33; inner margin of ear conch 11; tibia 13; calcar 3.8. 
Skull of type: Greatest length 18.2; basal length 16.3; mastoid width 
9.5; zygomatic width 11; width of braincase 8.6; maxillary width across 
m.! 7.8; width across cingula of canines 5.4; length of palate 7.1; upper 
toothrow including canine 5.8. 
Remarks. No specimens of any of the smaller Artibeus have here- 
tofore been obtained from Brazil or elsewhere in central South America 
between Surinam, where A. quadrivittatus occurs, and Ecuador and Peru, 
where A. ioltecus ravus and A. glaucus have been found. Although 
obviously related to all of these and occupying an intermediate region, 
the present species is probably distinct. It is characterized chiefly 
by small size, and by its short-faced skull and reduced first upper molar. 
Four specimens are in the collection, all in alcohol ; hence no accurate 
description of the color is possible. Actual comparisons have been 
made only with two specimens of A. toltecus ravus from near the type 
locality. 
Artibeus jamaicensis lituratus Lichtenstein. 
One specimen, Santarem, Brazil. Collected by G. K. Cherrie. 
Molossus obscurus Geoffroy. Dusky Motossus. 
Eleven specimens, Trinidad (7), Todos Santos (1), Porto Velho (2). 
This common and widely distributed species is well represented. 
The specimens show no obvious distinctions from others from eastern 
Brazil.* 
CB lhe ingle Bh crassicaudatus, first noticed in this connection, may be 
briefly as follows:— 
Molossus oe tecticola subsp. nov. 
i oo yf, roy F pene No. eg om ae Museum of 
“we at History ected pee 1913 by Becker. 
Similar to M. crassicaudatus and M, obscurus, bu. very much 
incom ohne & tha apoe peste brownish Isabella color with the 
of the hairs whitish buff; under parts paler, a sort of vinaceous drab. Skull 
practically as in M. crassicaudatus. 
: Total length 103; tail 38; foot 11; meaees (Ory) 99- 
is a well marked form occupying the arid parts of eastern Brazil and al- 
though there is much color variation among from other parts of South 
America, it seldom approaches the degree rule phon by all speeimene af this 
form. Eight skins and thirty-five alcoholics have been examined. 
