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, 1 1 ; mandible, 16.6 ; 

 maxillary tooth row, 8.8; mandibular tooth row, 9. 



a. obscurus (Molossus}, Geoff., Ann. Mus. Hist. Nat. Paris, vi, 

 1805, p. 155. 



longicaiidatus Geoff., Ann. Mus. Hist. Nat. Paris, vi, 1805, p. 155. 



acuticaudatus Desm., Mamm., 1820, p. 116. 



velox Temm., Mon. Mamm., i, 1827, p. 234. 



fuliginosus Gray, Mag. Zool. Bot., n, 1838, p. 501. 



olivaceo-fuscus Natt., Wagn., Abh. Akad. Munch., v, 1844, p. 202. 



jumarius Burm., Thier. Bras., I, 1854, p. 71. 



aztecus Sauss., Rev. Mag. Zool., 2me Ser., xn, 1860, p. 285. 

 DUSKY MASTIFF BAT. 



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;fifthfinger,metacarpal, 24; tibia, 13.9; foot, io;ear, 13.9; tragus, 2. 



578. tropidorhynchus (Molossus), Gray, Ann. Nat. Hist., iv, 1839 



p. 6. Sept. 

 PUG-NOSED MASTIFF BAT. 



Type locality. Cuba. 



Geogr. Distr. West India Islands. 



Genl. Char. Similar to M. r. obscurus, but smaller; forearm shorter. 



Color. Abcrve 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., 



1902, p. 395. 

 BLACKISH 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 

 broccoli 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; 



