18/6.] MR. G. E. DOBSON ON THE MOLOSSI. 7<)Q 



1—1 



Inc. % ; pm. «—<> ; ears close together, tragus linear. 

 (Subgen. Molossus, Ptrs.) 



4. Molossus rufus. 



Molossus rufus, Geoffroy, Ann. du Mus. vi. (1805), p. 154 ; 

 Gervais, Exped. de Castelnau, Zoologie, p. 58, pi. xii. figs. 4 and 

 A a (skull and teeth); Peters, Monatsb. Akad. Berl. 1865, p. 575. 



Molossus ursinus, Spix, Sim. et Vespert. Brasil. (1823), p. 58, 

 pi. xxv. fig. iv. 



Dysopes alecto, Temminck, Monogr. Mammal, i. p. 231 (1835- 

 41). 



Dysopes holosericeus et albus, Natt., Wagner, Wiegm. Archiv, 

 1843, p. 3G8. {Vide Peters, Mon. Akad. Berl. 1866, p. 22.) 



Dysopes wsi/ms, Wagner, Suppl. Schreb. Saugeth.v. p. 709(1855). 



Ears much shorter than the head, their inner margins arising close 

 together, slightly in front of a line drawn between the eyes, from a 

 point on the forehead, from which a sharp ridge passes forwards on 

 the face to the nose : outer and inner margins of the ear-conch con- 

 vex, forming almost a regular semicircle ; antitragus circular, arising 

 by a narrow base from which it expands equally anteriorly and pos- 

 teriorly ; tragus minute, linear, acutely pointed. Extremity of the 

 muzzle obtuse, rounded, projecting beyond the mandible ; the nasal 

 apertures directed forwards and slightly outwards, separated by a 

 considerable interval (which is covered with short erect hairs dilated 

 at their extremities) from the margin of the lip, beyond which the 

 extremity of the nose scarcely projects ; lips thick, smooth, without 

 wrinkles. 



In the male, the opening of a large glandular sac directed forwards 

 is found opposite the anterior extremity of the sternum ; in the female 

 this sac is much smaller. 



Wings from the ankles. Fur very short, deep reddish brown 

 above and beneath. The face and ears are nearly naked. On the 

 upper surface, the wing-membrane is covered as far as a line drawn 

 from the middle of the humerus to the middle of the femur, and 

 short fur extends upon half the antebrachial membrane, and behind 

 the distal two-thirds of the forearm to the carpus, covering also the 

 angle between the fourth and fifth metacarpal bones ; behind, the 

 base of the interfemoral membrane also is covered. Beneath, the 

 fur of the body extends upon the wing-membrane almost as far out- 

 wards as a line drawn from the elbow to the knee ; and a band passes 

 outwards behind the elbow, becoming gradually wider towards the 

 carpus, till it occupies a space there extending from the forearm to 

 the middle of the metacarpal bone of the fourth finger, beyond which 

 it passes and occupies the angle between it and the metacarpal of the 

 third finger, being limited in its extent outwards by the muscular 

 band extending to the wing-membrane in this position; a small 

 space between the proximal extremity of the fifth metacarpal and 

 the short muscular band extending from the end of the forearm to 

 the wing-membrane is naked. 



Pkoc. Zool. Soc. — 1876, No. XLVII. 47 



