332 PROCEEDINGS OF THE ACADEMY OF [1898. 



Fur and color. — In quality and distribution the fur resembles 

 that of G. soricina. It is 7 mm. in length on middle of back, 

 slightly longer on throat and shorter on belly. 



Color above dark hair brown, slightly tinged with Prout's brown, 

 the hairs everywhere very pale hair brown through basal two-thirds 

 or three-fourths. Belly light broccoli brown, becoming much 

 darker on chest and throat. 



Ears. — As nearly as can be determined from the dried specimen 

 the ears are essentially as in G. soricina, though considerably larger 

 and apparently with broader tragus. 



Skull. — Aside from its conspicuously larger size the skull of Glos- 

 soohaga longirostris differs from that of G. soricina in its relatively 

 longer rostrum, the sides of which are more nearly parallel, less 

 strongly arched brain-case, and in the narrowness of the backward 

 prolongation of the bony palate behind the plain of the last molar. 

 In G. soricina the width of the bony palate at the constriction im- 

 mediately behind the last molar is contained only twice in the dis- 

 tance from the latter point to the tip of the hamular. In G. longi- 

 rostris it is contained nearly two and one-half times. 



Teeth. — In the only known specimen of Glossophaga longirostris- 

 — an adult, though by no means aged individual — the incisors have 

 all been shed. Distinct traces of the alveoli can still be seen in the 

 mandible, but these are nearly obliterated in the upper jaw. 

 Whether this condition is normal, as in the genus Lichonycteris, 2 it 

 is, of course, impossible to say. In much older individuals of G. sori- 

 cina and G. truei 3 the incisors are invariably present, so far as my ob- 

 servation has gone. In relative size the premolars and molars are es- 

 sentially as in G. soricina. All, however, are very distinctly nar- 

 rower. Or, in other words, the teeth have shared in the general 

 elongation of the jaws without undergoing any proportional increase 

 in width. In the lower premolars where the characters are most 

 strongly marked, the width of each tooth is appreciably less than in 

 G. soricina, while the longitudinal extent of the three together 

 exceeds the same measurement in G. soricina by nearly one milli- 

 metre. 



Measurements. — Total length, 80 ; 4 tail, 18 ; 4 tibia, 16 ; foot, 10;* 

 thumb, 9 ; forearm, 39; longest finger, 80; ear, 14. 4 Skull: total 



2 Thomas, Ann. & Mag. Nat. Hist., ser. 6, XVI, p. 55, July. 1895. 

 5 H. Allen, Science, N. S., V, No. 108, p. 153, January 22, 1897. 

 'Collector's measurement. 



