NEW PHILIPPINE MAMMALS— 3f EARNS. 459 



External measurements of two adult females from Mount Apo, Mindanao. 



No. 125244, 

 Measurement (from fresh specimens). U.8.N.M., U.S.N.M., 



topotype. 



Total length 



Tail to end of naked tip 



Length of hind foot 



Length of head 



Ear above crown 



Ear above notch 



APOMYS INSIGNIS, new species. 



GREAT APO MOUSE. 



Tah-l'o'-bo Oom-boug}/; Omh-hoi'-say Oom-bough^ (Bagobo). 



Type.—MnM female (skin and skull), Cat. No. 125230, U.S.N.M. 

 Collected on Mount Apo at 6,000 feet altitude, southern Mindanao, 

 Philippine Islands, July 8, 1904, by Edgar A. Mearns. (Original 

 number, 5711.) 



Characters. — Those of the genus, of which it is the largest known 

 species; caudal rings about 12 to the centimeter; tubercles of hind 

 feet small and widely separated, the largest measuring less than 5 mm. 

 in length; longest whiskers 60 to 65 nmi. in length. 



Color. — Upperparts mummy brown; underparts cinnamon-fawn, 

 with a white area in the middle of the chest, top of head and back 

 very finely mixed with black; end of muzzle and throat drab-gray; 

 fore leg seal brown externally; fore feet white; hind feet whitish drab 

 above; toes white, tufted at base of claws; naked soles and ear pur- 

 plish slate; tail purplish slate, paler below, but not distinctly l)icolor; 

 three of the fourteen specimens with extreme end of tail white; whis- 

 kers mixed white and black; wrists clay color below; ankles seal 

 })rown; pelage of upperparts slate color at base, of underparts (except 

 in the white area) slate-gray. Iris dark brown; claws horn color. 

 The white area of the underparts varies from a small stripe ))etween 

 the fore-legs to a broad, irregular ventral band ending near the vent. 

 In one case the white stripe is interrupted. 



The young are mouse gray, becoming washed with brown above and 

 cinnamon below as they grow older. 



Skull and teeth. — Braincase flattened as compared with the other 

 species of AjH>///y.s; anterior profile of skull flat and level; rostrum 

 thickened; nasals evenly tapering to an acute base even with the 

 fronto-maxillary suture; audital bullae less inflated and rounded; tcM^th 

 large. 



