1898.] NATURAL SCIENCES OF PHILADELPHIA. 195 



Cranial characters. — Skull viewed from above (contrasted with 

 leucogaster), long and narrow, the brain case high, compressed, 

 elongate, ovate; the rostrum much narrowed and the nasals slender 

 and projecting decidedly beyond the anterior tips of the premaxil- 

 laries. No distinct supraorbital bead as contrasted with longipes 

 from Texas. Palate ending posteriorly with a convex edge as in 

 torridus, as contrasted with the strongly developed median spine of 

 leucogaster. 



Measurements (of type). — Total length 150 mm. ; tail vertebrse, 

 45; hind foot, 21; ear, from crown (dry), 11. Average of four 

 topotypes, iu same order as above : 152 — 46 — 22. Skull : total 

 length, 28.6 ; nasal length, 11.3; zygomatic expansion; 14.7; mas- 

 toid expansion, 12; interorbital constriction, 4.7 ; length of mandi- 

 ble 15.3. 



