40 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
ually into color of sides; toes and fingers, whitish ; upper surface of feet and 
hands, brownish; ears, dusky; tail, dusky all round for two thirds of its 
length, white all around for the terminal third. 
Measurements. — Type, adult 9, with unworn teeth, total length, 215; tail 
vertebrz, 130; hind foot, 23; ear, 15. Skull, basal length, 21.4 ; occipito- 
nasal length, 25.4; mastoid width, 11.6 ; length of nasals, 8.8; length of pal- 
ate to palatal notch, 10; length of palatal slits, 4.8 ; upper molar series, 4.2 ;. 
single half of mandible, 13.6. 
Remarks. — The type and only specimen of this remarkable little animal, 
is an adult 9, but with unworn teeth, so probably it is not full grown, and old 
adults would be still larger. Externally it bears a somewhat superficial re- 
semblance to the woolly Oryzomys, of the subgenus Erioryzomys. The single 
specimen was caught on the cold, barren summit of the Volcan de Chiriqui. 
Akodon teguina apricus,! subsp. nov. 
Type. — Mus. Comp. Zodl., No. 10,286, old ad. 9, Boquete, February 24, 1901. 
4000 feet. 
Five specimens, Boquete, 4,000 to 5,000 feet, February and April. 
Characters. — Colors not so black as in true A. teguina (the rump and thighs. 
in true A. teguina are blackish, in the new form they are scarcely darker than 
20. x 12. BL Soule: 
Fies. 20 anp 21. Akodon teguina apricus. Type. 
the rest of the upper parts) ; tail, longer; ears, larger; skull, heavier ; rostrum, 
heavier; molar-form teeth much heavier ; tooth rows not so parallel, — much 
more divergent anteriorly. Pelage, short, close, and fine with decided gloss. 
Color. — Upper parts vandyke-brown, slightly more dusky on top of head 
and along middle of back ; under parts dull cinnamon rufous; hands, feet, ears, 
and tail blackish. 
1 Apricus, exposed to the sun, hence, southern. 
