40 BULLETIN : MUSEUM OF COMPAEATIVE ZOOLOGY. 



uallyinto 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 

 vertebrse, 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. 



ReTiiarks. — 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,i subsp. nov. 



Type. — Mu3. Comp. Zool., No. 10,236, 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 If. 21. X 1|. 



Figs. 20 and 21. Akodon teguina apneas. 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. 



