7. LOPHOSTOMA, 473 



7. LOPHOSTOMA. 



Lopliostoma, D'Orhigny, Voy. dans VAm^riqw mirid. p. 11 (1847) ; 

 Qenais, Expid. du Comte de Castelnau, Zoohgie, p. 48 (1855). 



General form of the head as in Vampyrus, but the horseshoe- 

 shaped portion of the nose-leaf very narrow in front of the nasal 

 openings, and bound down to the muzzle ; chin with a central wart, 

 margined laterally by smaller warts ; ears large, as long or longer 

 than the head, separate or united at their bases ; tail short, per- 

 forating the large interfemoral membrane and appearing upon its 

 upper surface ; wing-membrane from the dorsal surface of the tarsal 

 or metatarsal bone of the outer toe; first phalanx of the middle 

 finger less than half the metg,carpal bone. 



7-1 .•,• T 4 1—1 2—2 „ 3—3 



Dentition, inc. j, c. j— j, pm. g^g, m. g^^. 



Second lower premolar minute, in the tooth-row or in the outer 

 angle between the first and second premolars. Skidl long and 

 narrow, the width between the temporal fossse equal to or less than 

 that of the muzzle across the nasal bones. 



Range. Brazilian Subregion. 



This genus is quite intermediate between Vampyrus and Phyl- 

 lostoma, resembling the former in the general shape of the skull, the 

 latter in the shorter muzzle and in the warts of the lower lip. 



Synopsis of the Species. 



a. Ears separate, not exceeding the head in 



length ; skuU nearly as wide between the 

 postorbital fossee as at the first upper pre- 

 molai-. 

 a'. Fur, above, unicoloured, dark brown ; fore- 

 arm 2"1, tibia 0"-85 ... 1. X. bidens, p. 473. 



b'. Fur, above, bicoloured, white at the base 

 of the hairs, towards the extremities 

 dark brown; forearm 1"45, tibia 0"-75 . 2. L. brasiliense, p. 474. 



b. Ears considerably longer than the head, 



united by a low band across the forehead ; 

 skull much naiTower between the post- 

 orbital fossse than at the first upper pre- 

 molar. 

 c'. Fur, above, brown, whitish at the base of 



the hairs; foreann 2"-2, tibia 1" 3. L. ambhjotis, p. 476. 



1. Lophostoma bidens. 



Vampyrus bidens, Spix, Simiar. et Vespertil. Brasil. p. 64, pi. xxxvi. 



fiff. 5 (1823). 

 PhyUostoma childreni, Gray, Mag. Zool. ^ Bot. n. p. 488 (1838). 

 Tylostoma childrenii, Ch-ay, P.Z. S. 1866 p. 114 

 Lophostoma bidens, Peters, MB. Akad. Berl. 1865, p. 509. 



Ears as long as the head, separate ; ear-conch much longer than 



