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 — 
No. Sex. Total length. Tail vert. Hind foot, Ear. 
10,369 & adult. 325 110 48 6 
10,368 & yg. ad. 320 105 50 6 
10,362 9 old ad. 330 110 52 5 
10,364type 9 old ad. 320 110 48 6 
10,366 ? ad. 320 100 46 v 
10,363 ? ad. 330 100 47 6 
10,365 ? yg. ad. 320 110 47 6 
10,367 f young 300 95 47 4 
Skull, type, 2 old adult, basal length, 54; occipitonasal length, 57.6; zygo- 
matic width, 36; mastoid width, 27.8; interorbital width, 11.8; length of 
nasals, 23; length of palate, to palatal notch, 37; upper molar series, 13; 
length of single half of mandible, 41. 
Remarks. —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 Volcan de Chiriqui. 
Heteromys repens,! sp. nov. 
Type.— Mus. Comp. Zodl., 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 Repens, unexpected, unlooked-for. 
