BANGS: CHIRIQUI MAMMALIA. 45 



nose and sides of head and neck where the skin shows through. Skull much 

 smaller and weaker throughout, with less spread to zygoma ; nasals, shorter ; 

 interorbital width greater ; molar-form teeth much smaller. 



Color. — Upper parts dull, dusky, chocolate-brown ; under parts grizzled, 

 the belly whitish: whiskers mostly colorless; feet, hands, and tail naked (in 

 dried skin) yellowish brown, the tip of the tail dusky. 

 Measurements — 



Total length. 



325 



320 



330 



320 



320 



330 



320 



300 



il length, 54 ; occipitonasal length, 57.6 ; zygo- 

 1th, 27.8; interorbital width, 11.8; length of 

 nasals, 23; length of palate, to palatal notch, 37; upper molar series, 13; 

 length of single haK of mandible, 41. 



Remai-ks. — In July, when Mr. Brown was at Bogaba, birds were moulting 

 and mostly unfit for specimens; consequently he spent considerable time 

 searching for suitable places for future work, trapping mammals, and collecting 

 a few examples of some of the rarer birds. On one of his long rides he came 

 upon a single isolated colony of pocket gophers. It was in the foot-hills, about 

 600 feet altitude, and was the only colony he found in the whole region. The 

 members of this colony were rather hard to trap, as pocket gophers sometimes 

 are, and unfortunately the only old $ secured was caught in the trap by the 

 head and the skull crushed. The species is very different from the large, black 

 species found so abundantly on the higher slopes of the Yolcan de Chiriqui. 



Heteromys repens,i sp. nov. 



Type. — Mus. Comp. Zool., No. 10,356, old ad. 9, Boquete, April 8, 1901. 4,000 

 feet. 



Six specimens, Boquete, 4,000 to 5,800 feet, February and April. 



Characters. — Apparently a very distinct species. Hind feet large, soles 

 naked, six pads. These characters at once distinguish it from the Costa Rican 

 H. salvini nigrescens Thomas. From H. adspersus Peters, from Panama, it 

 differs in its longer hind feet and strong cranial characters, the skull being 

 very much wider between the orbits ; the nasals longer than the ascending 

 branches of premaxilla (shorter in H. adspersus) : the supraorbital beading 



1 Reiiens, unexpected, unlooked-for. 



