130 BULLETIN 57, UNITED STATES NATIONAL MUSEUM. 



Number of forms. — Three species of Anthorhhut are now known. 



Character*. — Teeth essentially as in Mimon, the dental formula the 

 same, and the inner upper incisor similarly vertical; anterior upper 

 premolar (pm s ) scarcely larger than outer incisor; lower incisor 

 with crown about as wide as high, and cutting edge faintly trifid; 

 lower molars like those of Micronycteris. Skull not strikingly differ- 

 ent from that of Mimon, but rostrum with indication of median 

 groove, basisphenoid pits deep and distinct, and audital bullae large, 

 each covering more than half of cochlea, their height on inner side 

 much greater than width of basioccipital. Ears large, separate. 

 Tail about as long as femur, terminating at middle of very broad 

 interfemoral membrane. 



Specie* examined. — Anthorhina crenulata (Geoffroy), saidA.picata 

 (Thomas). 



Genus PHYLLOSTOMUS Lacepede. 



1799. Pliyllostomus Lacepede, Tabl. des Div., Sousdiv., Ordres et Genres des 

 Marnmif., p. 16 (hastatus) . 



1800. Phyllostoma Cuvier, Legons d'Anat Comp., Tabl. I (described in 

 Tabl. Elem. d'Hist. Nat, p. 105, 1798). 



1866. Alectops Gray, Proc. Zool. Soc. London, p. 114 (atcr=clongatum) . 

 1878. Phyllostoma Dobson, Catal. Chiropt. Brit. Mus., p. 484. 

 1901. Pliyllostomus Miller and Rehn, Proc. Boston Soc. Nat. Hist, XXX, 

 p. 282, December 27, 1901. 



Type-species. — Yespertilio hastatus Pallas. 



Geographic distribution. — Tropical America, north to Honduras. 

 Number of forms.— Eight forms of Phyllostomus are now known. 

 Characters. — Dental formula : 



- 2 3. 1. - - 3 4 5 6 7 .2-2 1-1 2-2 3-3 



1 2 -. 1. - 2 - 4T67 * 2^2' ° HH> P m 2^2' m 3^3= 32 - 



In form the teeth for the most part resemble those of J/kronyeteris, 

 there being no essential differences in the molars, canines, and upper 

 incisors of the two genera. Hypocone distinct though low in to 1 , 

 obsolete in m -. Paraconids as in Micronycteris. Premolars with 

 thick, rather short shafts, and slightly developed cingula. Middle 

 upper incisor simple, somewhat projecting, the front surface nearly 

 as long as high, the posterior surface slightly concave; lateral in- 

 cisor short and blunt, scarcely rising to level of indistinct cingulum 

 of canine and middle incisor. Upper canine, with a broad flatfish 

 groove on anterior face of shaft and a less developed one on antero- 

 outer face. Lower incisors forming a continuous, nearlv straight row 

 between cingula of canines, the outer tooth slightly" smaller than 

 inner; upper surface of crown slightly longer than height of ante- 

 rior surface; cutting edge faintly trifid, the middle lobe smallest 

 Skull heavy and robust, with broad, rather low and flatfish rostrum 



