706 



MR. G. E. DOBSON ON THE MOEOSSI. 



[Nov. 7, 



In the following analytical tabic of the species, and in the subse- 

 quent descriptions, reference is often made to the different parts of 

 the ear-conch shown and named in the woodcut below, which repre- 

 sents, in half-outline, the head of Molossus glaucinus. 



Fig. 1. 



<■ ' rr 



Head of M. glaucinus. 

 a, Antitragus ; b, keel of the ear-conch ; c, notch behind antitragus. 



Synopsis of the Species. 

 I". Muzzle obtuse, rounded in front; lips smooth, not 

 wrinkled ; tragus triangular or linear. 



a. Antitragus circular, as high as long. 



<>'. Tragus triangular with a broad base ; inner 

 margins of the ears arising by separate 



„ . . . 2 l—l 



points of origin ; inc. -, pm. ^—=. 



a". Ears obtusely pointed, forearm 1"*2 1. M. teiuminrkii, p. 707. 



b". Ears rounded above. 



a'". Centre of breast and abdomen white ; 



forearm l" - 35 2. M. planirostris, p. 707. 



b'". Centre of breast and abdomen not dif- 

 ferent from sides ; forearm 1"7 3. M. brachymdes, p. 70S. 



b'. Tragus linear, subacutely pointed, inner mar- 

 gins of the ears arising from the same point 

 or very close together. 



c". Inc.^, pm. -^ 4. M. rufus, p. 709. 



d". Inc. -, pm. g^q 5. M. nasutus, p. 71 I. 



b. Antitragus half-oval or half-cordate, longer than 



high, tragus linear ; inc. -, pm. ^S 6. M. abrasus, p. 712. 



II. Muzzle very obUquely truncate, its superior and 

 external front margins formed by the sharply cut 

 cartilaginous rim of the nostrils, lips smooth or 

 very slightly wrinkled; tragus quadrate; inc. 



2 2—2 



4- P m " 2=2- 



a. Ears longer than the head ; gular sac large ; first 



upper premolar external 7. M. perotis, p. 713. 



b. Ears shorter than the head, gular sac small ; first 



upper premolar in the tooth-row. 



a'. Upper lip smooth ; forearm 2" '3 8. M. glaucinus, p. 714. 



b'. Upper-lip slightly wrinkled ; forearm 1" -8 ... 9. M. bonariensis, p. 715. 



