44 BULLETIN 43, UNITED STATES NATIONAL MUSEUM. 



Artibeus2)er>ipiciJ}aiits, Feters, MB., Akad. Berlin, 1865, p. 356; (l)Mayuard, Bull. Essex 

 lust., 1872, 137; Dobson Cat. Chirop. Brit. Mus., 1878, 519; Alston, Biolog. Cen- 

 trali-Anier., Mam., 1879-'82, 47.* 



Artiheus is intermediate betAveeu Uroderma and Dermannra and the 

 three genera are in close alhance. Peripheral characters such as those 

 of tlie auricle and nose-leaf are of doubtful value. The small third 

 lower molar separates ArUhvus from Dermannra., as the absence of the 

 third upper molar separates it from Uroderma. 



All of the three genera named can be distinguished from Vampyrops 

 by the shape of the tirst lower molar. In Vampyrops the protoconid 

 is greatly elevated, while the anterior border of the tooth is not pro- 

 longed. 



Diagnosis. — Nose-leaf smooth, with entire margins and a broad 

 longitudinal ridge, which is discernible on both anterior and posterior 

 surfaces; lower j)ortion, as a rule, not free at any part from the upper 

 lip. lufra marginal tubercles at the mentum more than three in num- 

 ber.t Mentum provided with a large central wart, on either side of 

 which is placed a smaller wart; the whole arrangement is surrounded by 

 a semicircular row of nodules. Interfemoral membrane scanty, deeply 

 emarginate, without tail. 



Molars broad without Ys and exhibit a disposition to become cuspi- 

 date on outer and inner border.^. Upper middle incisor broad and 



straight. 



o 2 1^ 



Dental Formula. — Molars,^; premolars,-; canines, . incisors,-^ X 2=30. 



Description. — General form massive; the body heavy; the head 

 with broad transverse diameter. Auricles small, separate. Each au- 

 ricle when laid against the face reaches the external cauthus. The 

 inner border is markedly convex and continued in a single curve with 

 the broad internal basal lobe. The outer border is straight, with a 

 number of transverse lines on couch. The hem is one-tbird the width 

 of the auricle at its broadest part and is continuous below with the 

 rounded broad external basal lobe. A conspicuous external basal ridge 

 is present. The tragus in height equals the distance from the tragus 

 to the eye. It is erect, slightly convex on inner border, almost straight 

 in the inner, and thickened along the median surface, which is usually 

 coarsely spinose iuferiorly. The basal notch broad, with a spine at the 

 upper border the basal lobe. A fold of skin extends obliquely from 

 the base to the face. The nostrils are oval and placed obliquely upward 

 and outward. The ends of the opening are free, but the sides are 

 remarkably foliated. The nose-leaf is thus divided by the nostrils into 

 an upper (supra narial) and a lower (infra narial) portion. Both of 



*Tlie synonomy in part has been copied from Dobson's Catalogue of the Chi- 

 roptera in the British Museum. 



1In two specimens of Dermanura cinerea examined, the sides of the nose-leaf 

 were concave, the posterior surface of the nose-leaf was without trace of longitu- 

 dinal ridge, and the infra-marginal tubercles were three in number. 



