92 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 69 



baited trap set at the foot of a large tree in the fairly heavy forest 

 that clothes Mount Tacarcuna. 

 Specimens examined : The type.* 



I 



Genus SCOTINOMYS Thomas. Brown Mice 

 The members of the genus Scotinomys are very small blackish or 

 dark brownish mice with soft pelage and tails shorter than the head 

 and body. Several species have been described and the group ranges 

 from southern Mexico to western Panama. Until recently ^ the 

 species were included in the genus Akodon which, by the segregation 

 of this Middle American group, becomes eliminated from the North 

 American fauna. Scotinomys differs from Akodon in dental details, 

 the molars being narrower and more elongated in the antero-posterior 

 direction. The lateral compression is especially noticeable in the 

 posterior portion of the first upper molar. An inner view of this 

 tooth shows the posterointernal reentrant angle extending as a deep 

 groove to the alveolar border and in advanced age three root divisions 

 are visible instead of two as in Akodon. The lower incisor lacks a 

 tubercular SAvellins: over the root. 



SCOTINOMYS TEGUINA APRICUS (Bangs) 



Boquete Brown Mouse 



Akodon feguina apricus Bangs, Bull. Mus. Comp. Zool., Vol. 39, No. 2, p. 40, 

 text figs. 20-21, April, 1902. Type from Boquete, Chiriqui, Panama 

 (altitude, 4,000 feet). 



Scotinomys t. apricus is based on five specimens collected by 

 W. W. Brown, Jr., at from 4,000 to 5,000 feet altitude near Boquete 

 on the basal slope of the Volcan de Chiriqui. 



The original description is in part as follows : 



" Colors not so black as in true A. tegnina (the rump and thighs 

 in true A. tcguina are blackish, in the new form they are scarcely 

 darker than 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. 



" 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. 



^ Collection Amer. Mus. Nat. Hist. 



*See Thomas, Ann. Mag. Nat. Hist., Ser. 8, Vol. 11, p. 408, April, 1913. 



