1. CHILOUXCTERtS. 453 



thuml) 0"-3; third finger— metacarp. 2", 1st ph. 0"-4, 2nd ph. 0"-7, 

 3rd ph. 0"-8 ; fourth finger— motacarp. 2", 1st ph. 0"-42, 2nd ph. 

 0"-6; fifth finger— metacarp. l"-9, 1st ph. 0"-45, 2nd ph. 0"-6; 

 tibia 0"-8, foot 0"-45. 



Hab. Guatemala ; Costa Hica ; Columbia ; Brazil. 



This is the largest species of the genus. 



a- ad. sk. Cuidad Vieja, Guatemala. 0. Salvin, Esq. [C. 



b. ^ ad., al. Duefias, Guatemala. O. Salvin, Esq. [C, 



c. 5 ad., al. Columbia. Purchased. 



6. CMlonycteris davyi. 



Pteronotus davj'i, Ch-ay, Mag. Zool. 8f Bot. ii. p. 500 (18.38) ; Voyage 



of the ^Sulphur,' Mammalia, p. 24 (1844) ; Peteis, MB.Akad. Bei-l. 



1872, p. 361. 

 Chilonyeteris gymnonotus, Wagner, Wiegm. Archiv, 1843, p. 367 ; 



Abhandl. Miinch. Akad. v. p. 183, pi. iii. fig. 1 ; Suppl. Schreb. 



Saugeth. v. p. 680 (1855). 



Slightly larger than Ch. madeayi, but at once distinguished from 

 that and from every other known species by the origin of the wings 

 from the spine and by the nakedness of the back behind the 

 shoulders. 



General form of the head and ears very similar to those of Gh. 

 madeayi, but the outer side of the ear is marked by an obtuse-, not 

 acute-angled notch, and there are no pointed processes above the 

 nostrils, although on either side an obtuse process arises from the 

 margin of the muzzle in front (Plate XXIII. fig. 4). 



The horizontal cutaneous expansion projecting forwards from the 

 under surface of the lower jaw extends considerably beyond the 

 reflected margin of the upper lip in front, more so than in other 

 species, but otherwise quite similar in structure. 



Wings from the middle of the tibiae and from the calcanea. 



Above and beneath dark reddish brown, paler towards the ex- 

 tremities of the hairs. 



Teeth as in Ch. madeayi, but the basioccipital between the 

 cochlea is wider. 



Length (of the type, an adult (S ), head and body 2", tail 1", head 

 0"-7, ear 0"-6, tragus 0"-2, forearm l"-85, thumb 0"-25 ; third finger 

 —metacarp. l"-65, 1st ph. 0"-35, 2nd ph. 0"-6, third ph. 0"-5; 

 fourth finger— metacarp. l"-4, 1st ph. 0"-35, 2nd ph. 0"-4 ; fifth 

 finger— metacarp. l"-3, 1st ph. 0"-4, 2nd ph. 0"-35 ; tibia 0"-7, 

 foot 0"-4. 



Hah. Brazilian Subregion (Puerto CabaUo, Venezuela; Mato 

 Grosso, Brazil). 



Type in the collection of the Museum of the Army Medical De- 

 partment at Netley. 



a. cj ad., al. I'uerto Caballo. Purchased. 



h, c. J ad., al. Venezuela. Mr. Dyson [0.]. 



