550 PHTLLOSTOMID^. 



a, b. ad. sks. Oaxaca, Mexico. 



{hi an old gold-mine shaft, 30 to 40 yards from the surface.) 



c. ad. sk. Vera Paz, Guatemala. O. Salvin, Esq. [C.]. 



d, e. juv. at ad. c? , al. Ecuador. Mr. Eraser [C.]. 



f. ad. sk. Ecuador. Prince Bonaparte [C.]. 



g. (S ad., al. Peru. Lord Lilford [P-l- 



h. ad. sk. Coquimbo, Chili. Charles Darwin, Esq. 



(Skin of individual caught in the act of sucking the blood of a horse, 



referred to in Mr. Darwin's ' Naturalist's Voyage.' Type of D. 



cVnrbignyi, Waterhouse, and original of figure and description in 



the Voyage of the ' Beagle '.) 

 i. ad. sk. Chili. Mr. Bridges [C.]. 



;'. ad. sk. Sta. Catherina, Brazil. Purchased. 



k. ad. sk. Brazil. Purchased. 



I. ad. sk. Bolivia. Purchased, 



m. ad. sk. No history. 



n. skull. (Labelled Des?nodm (Torhignyi.) 



33. DIPHYLLA. 



Diphylla, Spix, Simiar. et Vespei-t. Brasil. p. 68 (1823) ; Wagjier, 

 Suppl. Schreh. Sciugeth. i. p. 38-3 (1844), v. p. 616 (1855). 



Muzzle and ears as in Desmodus ; lower lip reflected outwards in 

 front of the incisors, not grooved ; interfemoral membrane not de- 

 veloped in the centre ; calcaneum short : tail none. 



Dentition. Inc. ^, c. i^J, pm. ^, m. |^. 



The single molars in the upper and lower jaws rudimentary, and 

 not distinguishable by form from the premolars. 



This genus, like Desmodus, is represented by a single species only. 



1. Diphylla ecaudata. 



Diphylla ecaudata, Spix, op. cit. p. 68, pi. xxxvi. fig. vii. ; Wagner, I. c. 



Slightly smaller than Desmodus rufus, which this species re- 

 sembles in the form of the ear-conch, muzzle, and upper incisors. 

 The upper margin of the small leaf above the nasal apertures is 

 straight or very slightly concave, and posteriorly a raised (?)glandular 

 ridge forms a semicircle between and behind the eyes, somewhat 

 broader on the sides, but not thickened in the centre ; lower lip 

 reflected outwards in front of the lower incisors, forming a square- 

 sided naked surface ; angles of the mouth folded outwards, as in 

 Desmodus rufiis. Eorm of the ear-conch very similar to that of D. 

 rufus ; tragus broader above, with an obtuse extremitj', and a well- 

 defined lobule at the base of the outer margin. 



Metacarpal bone of the thumb much shorter than in D. rufus, 

 and almost contained within the membrane ; but the relative pro- 

 portions of the other bones of the finger very similar to those of that 

 species. 



Wing-membrane from the tarsus or metatarsus ; interfemoral 

 membrane margining the legs, not developed in the centre ; calca- 

 neum short, projecting. 



