34 BULLETIN 43, UNITED STATES NATIONAL MUSEUM. 



femoral membrane; ears lateral, separate. Mosia, Mystacina, Aello, 

 Emhallonur((y Centronycteris, l^rocryptus, I>idi(lurus, T((2>Iiozohs, Noc- 

 tilio,Phyllo<lia, Chilonycteris, and Mormops are embraced in this oddly- 

 arranged gioui). In tlie same work, p. KJ, the anthor plat'es Mncfotus 

 near Megaderma and Rhinopoma as a snbgroup of the Phyllostomina: 

 "Ears close together over the forehead; forehead with a rather deep pit; 

 nose-leaf lanceolate, erect; tail elongate, prodnced beyond the inter- 

 femoral membrane; wings from the ankle ; lower joint of thumb mod- 

 erate." 



Wagner was of the opinion last named, that Macrotus exhibits affini- 

 ties with Megaderma. S. F. Baird followed this writer, and I naturally 

 accepted this opinion,* since my work was carried on und6r the guidance 

 of the eminent authority last named. Peters, in his revision of the 

 Phyllostomid?e,t definitely ^xed the position of the genus. 



Macrotus resembles Lonchorhina in the elevation of the nasal bones 

 and in the depression on the facial portion of the frontal bone, as well 

 as in the elevation of the skull at the vertex near the occiput and in the 

 large size of the tympanic bone. From Lophosto}na it is easily distin- 

 guished by the absence of the temporal crest, which is so conspicuous 

 in this genus, and by the form of the zygoma, which is higli and of 

 uniform diameter throughout. The frontal bone is without a depression 

 in the facial portion, and the nasal bones do not form a ridge, while 

 the dorsi-facial surface is cylindroid. PhyUostoma is distinguished in 

 having a small lachrymal process and a Hat, broad, dorsi-facial surface. 

 The temporal crest is defined, though not conspicuous. The zygoma 

 is of the same character as in Macrotus. The tympanic bone is much 

 smaller than in this genus. In a fragment of an immature skull of 

 Vampyrus anritus the skull is without temi)oral crest, the dorsi-facial 

 surface is cylindroid and without depression on the frontal bone. 



1. Macrotus californicus Baird. (Plates i, ii.) 



Macrotus cali/oniicus Baird, Pi'oc. Acad. Nat. Sci. I'hila., 1858, 117. lb., Rep. U. 



S. and Mexican Boundary Survey, pt. 2 (Maminals), 1859. 1, PI. 1, Fig. 2. 

 Macrotus waierhouiiii (in part), Dobson, Cat. Chirop. Brit. Mus., 1878; Alston, Biol. 



Centrali-Amer., Mam.. 1879-'82, 38. 



Diagnosis. — Auricle much longer than head. Basal lobes well devel- 

 oped. ISTose-leaf witli defined lower border. Fur (above and below) 

 base, white; terminal third, fawn; tip, gray. 



Description . — The auricle is ovate and longer than the head. The in- 

 ternal basal lobe is rounded and free, raised above the head and resting 

 against the interauricular membrane. The external basal lobe is large, 

 the greatest width equal to the distance between the eye and end of 

 the muzzle. A prominent wart, which lies above the rictus,f terminates 

 the lobe anteriorly. Two longitudinal ridges are seen on the inner 



* Monograpb N. A. Bats, 1864. 



tMB. Akad. Berlin, 1865. p. 2.56. 



IRictus will be used as a term interchangeable with angle of the mouth. 



