620 MOLOSSUS. 
16.5; tragus, 2.5. Skull: greatest length, 23; basal length, 20; median 
palatal length, 7.2; interorbital constriction, 4.2: zygomatic breadth, 
14; breadth of braincase above roots of zygomata, 11; mandible, 16.6; 
maxillary tooth row, 8.8; mandibular tooth row, 9. 
a.—obseurus (Molossus), Geoff., Ann. Mus. Hist. Nat. Paris, vi 
L805, D- E55. 
longicaudatus Geoff., Ann. Mus. Hist. Nat. Paris, v1, 1805, p. 155. 
acuticaudatus Desm., Mamm., 1820, p. 116. 
velox Temm., Mon. Mamm., 1, 1827, p. 234. 
juliginosus Gray, Mag. Zool. Bot., 11, 1838, p. sor. 
olivaceo-juscus Natt., Wagn., Abh. Akad. Mtnch., v, 1844, p. 202. 
jumarius Burm., Thier. Bras., 1, 1854, p. 71. 
aztecus Sauss., Rev. Mag. Zodl., 2me Sér., x11, 1860, p. 285. 
Dusky MastTIFF Bart. 
Type locality. Paraguay. 
Geogr. Distr. Guatemala, through Central America to Paraguay 
and Bolivia, South America. 
Color. Varying from dark brown to fulvous; lighter on under 
parts; ears and membranes black. 
Measurements. Total length, 79.5; tail, 26.9; forearm, 41.9; 
thumb, 7.6; third finger, metacarpal, 40.6; fourth finger, metacarpal, 
39.6; fifth finger, metacarpal, 24; tibia, 13.9; foot, 10; ear, 13.9; tragus, 2. 
’ 
578. tropidorhynchus (Molossus), Gray, Ann. Nat. Hist., tv, 1839 
p: 6. Sept. 
PuG-NosED MastTIFF Bart. 
Type locality. Cuba. 
Geogr. Distr. West India Islands. 
Genl. Char. Similar to M.r. obscurus, but smaller; forearm shorter. 
Color. Above mummy brown; beneath Prout’s brown. 
Measurements. Total length, 83-90; forearm, 32-36; tail, 27-30. 
579. nigricans (Molossus), Miller, Proc. Acad. Nat. Scien. Phil., 
TOO2 DAGOS: 
BiackIsH MastiFF Bat. 
Type locality. Acaponeta, Territorio de Tepic, Mexico. 
Genl. Char. Larger than M. rufus, with a heavier rostrum and 
wider interpterygoid space and palate; teeth heavier. 
Color. Upper parts dark seal brown with a crescentic area of 
broccol brown on the shoulders; under parts seal brown washed with 
broccoli brown, strongest on the throat; ears and membranes blackish 
brown. A red phase also exists. 
Measurements. Total length, 145; forearm, 52.6; thumb, 9; 
