260 BULLETIN 57, UNITED STATES NATIONAL MUSEUM. 
Wings, feet, tail, and membranes not 
(Spix) and P. fosteri 
dense brush below nostrils, 
peculiar. 
Species examined . — Promops nasutus 
(Thomas) . 
Remarks. — This genus is in many respects intermediate between 
Eumops and Molossus , though nearer the latter. It is at once recog- 
nizable by the distinctly flattened tragus, the highly domed palate, 
the presence of the rudimen- 
tary small upper premolar, 
and of a second lower in- 
cisor. 
Genus MOLOSSUS 
Geoffroy. 
1805. Molossus Geoffroy, 
Ann. Mils. d’Hist. Nat., 
Paris, VI, p. 158 ( rufus ). 
1811. Dysopes Illiger, Prodr. 
Syst. Mamm. et Avium, 
p. 122 (substitute for 
Molossus ) . 
1878. Molossus Dobson, Ca- 
tal. Chiropt. Brit. Mus., 
p. 107 (part). 
T ype-species. — Molossus ru- 
fus Geoffroy. 
Geographic distribution — 
Warmer parts of America, 
north to central Mexico and 
Cuba. 
Number of forms. — As 
now restricted the genus Mo- 
lossus contains M. rufus , M. 
ob scums , and the numerous 
local forms of these species. The M. fluminensis of Lataste may also 
be a member of the same group. 
Characters. — Dental formula : 
Fig. 
Molossus rufus. 
114885 
Sapucay, Paraguay. 
x 2. 
No. 
. l. 
1567-1-1 1-1 
1-1 
1 - -. 1. - 2 - 4 5 6 7 1 - 1’ C 1 - V- 2-2' 
3-3 „„ 
3UT 26 - 
Except for the absence of pm 2 and i 2 the teeth resemble those of 
Promops. The form of the upper incisor is, however, very charac- 
teristic, somewhat resembling that of Cheiromeles , the shafts scarcely 
projecting forward, and so reduced that their height is not equal to 
the width of the crown through the broad posterior heel. As in 
Promops , the upper molars usually show little or no distinct trace 
of hypocones, the large protocone occupying the entire inner side of 
