MOLOSSUS. 19 



Dysopcs Illig., Prodr. Syst. Mamm. et \v., 1811, p. 122. 



Ears close together, or united at base of their inner margins; 

 muzzle broad, obtuse or obliquely truncate; indistinct vertical wrin- 

 kles on lips, sometimes smooth; tragus short; first and fifth toes 

 thickest, backs of all with long curved hairs. Upper incisors with 

 their cusps close together in front. 



KEY TO THE SPECIES. 



A. Forearm over 50 mm. PAGE 



a. Above reddish brown M. rufus 619 



b. Above seal brown M. nigricans 620 



B. Forearm over 36 mm., under 50 mm M. obscurus 620 



C. Forearm not over 36 mm M. tropidorhynchus 620 



FIG. XCIX. MOLOSSUS RUFUS. 



No. 102789 U. S. Nat. Mus. Coll. Nearly liie sue. 



577. rufus (Molossii^, Geoff., Ann. Mus. Hist. Nat. Paris, vi, 1805, 



P- i55- 



ursinus, Spix, Simia. et Vespert. Bras., 1823, p. 58, pi. xxv, fig. 4. 



alecto, Temm., Mon. Mamm., i, 1827, p. 231. 



holosericeus , Natt., Weigm., Archiv. f. Naturg., 1843, p. 368. 



albus, Natt., Weigm., Archiv." f. Naturg., 1843, p. 368. 

 RUFOUS MASTIFF BAT. 



Type locality. Paraguay. 



Geogr. Distr. Southern Mexico, through Central America to 

 Paraguay and Bolivia, West Indies. 



Genl. Char. Glandular sac directed forward, opposite the an- 

 terior extremity of the sternum in the male ; ears shorter than head ; 

 antitragus circular; tragus small, acute; muzzle extending beyond the 

 jaw; short erect hairs between nostrils; lips smooth; wing membrane 

 from ankles. 



Color. General hue of body above and beneath reddish brown. 



Measurements. Total length, 128.2; tail vertebrae, 50.8; thumb, 

 10; forearm, 51; third finger, metacarpal, 50.8; fourth finger, meta- 

 carpal, 49.5; fifth finger, metacarpal, 26; tibia, 17.7; foot, 12.7; ear, 



