23. AETIBETJS. 521 



species inhabiting the same locality, and the last minute lower molar 

 is absent. 



Fur black above and beneath, with a slightly ashy tinge. No 

 white streaks on the face or along the spine. 



Length (of an adult c? ), head and body 2""15, interfemoral mem- 

 brane in the middle 0"-4, head 0"-8, ear 0"-65, tragus 0"-25, nose- 

 leaf 0"-4 X 0"-23, forearm l"-6, thumb 0"-4 ; third finger— metacarp. 

 l"-45, 1st ph. 0"-5, 2nd ph. 0"-8, 3rd ph. 0"-6 ; fifth finger— meta- 

 carp. l"-45, 1st ph. 0"-35, 2nd ph. 0"-48 ; tibia 0"-55, calcaneum 

 0"-2, foot 0"-4. 



Hob. Central America (Mexico ; Guatemala ; Costa Rica) ; Brazil 

 (Eio TJcayali). 



The small size of the animal and absence of the third lower pre- 

 molar is not due to immaturity, for a specimen in the collection 

 from Guatemala with much-worn teeth presents the same cha- 

 racters. 



I have examined the type of this species in the Paris Museum, 

 and can find no difference between it and specimens from Mexico 

 (Derrnaiiura toltecum, Sauss.). 



5. Artibeus quadrivittatus. 



Artibeus (Dermanura) quadrivittatus, Peters, MB, Akad. Berl. 1865, 

 p. 368. 



Very similar to A. cinereus, but the nose-leaf is narrower and not 

 so abruptly narrowed at the summit. Interfemoral membrane much 

 deeper, its narrowest part in the centre extending as far backwards 

 as a Hne drawn at right angles to the centre of the tibia ; its upper 

 surface thinly clothed with fine hairs, which also appear upon the 

 legs and upon the backs of the feet. 



Above brown, paler beneath ; the head with four longitudinal, not 

 very distinct, white streaks, arranged as in A. perspicillatus. 



The outer upper incisors in this species and in A. cinereus have 

 their external cusp nearly as large as the internal, while in A. j)er- 

 sjyicillatus the internal cusp is the principal part of the tooth. 



Length (of an adult c? )i head and body 2"-l, interfemoral mem- 

 brane in the middle 0"-55, head 0"-8, ear 0"-65, tragus 0"-23, nose- 

 leaf 0"-45 X 0"-25, forearm l"-55, thumb 0"-38 ; third finger— 

 tnetacarp. l"-45, 1st ph. 0"-55, 2nd ph. 0"-85, 3rd ph. 0"-6 ; fifth 

 finger— metacarp. l"-45, 1st ph. 0"-35, 2nd ph. 0"-5; tibia 0"-56, 

 calcaneum 0"-2, foot 0";4. 



Hab. Surinam ; Brazil. 



a. (S ad., al. Surinam. Purchased. 



b, c. ad. sks. Pernambuco. J. P. G. Smith, Esq. [P.]. 

 d. $ ad., al. No history. 



