1915.] MAEMOTA MOXAX GKOUP. 21 



cf . Sides of neck without conspicuous buffy patches. 



d. Tail cinnamon ochracea (p. 34). 



d\ Tail dark broTm or black. 



e. Colors pale (anderfur on back light pinkish cinnamon to light gray at 

 tips; belly not deep red). 

 /. Skull larger; condylo-basal length more than 90 mm monax (p. 22). 



f\ Skull smaller; condylo-basal length less than 90 mm. preblomm (p. 27). 

 e^. Colors dark (underfur on back pinkish cinnamon to orange-cinnamon at 

 tips; belly deep red). 

 /. Size smaller; condylo-basal length of c? skull less than 82 mm.; of $ 



less than 80 mm... canadensis (p. 30). 



f\ Size larger; condylo-basal length of 3' skull more than 82 mm.; of 9 

 more than 80 mm. 



g. Nasals relatively short and wide; width at posterior end in males 

 more than 11 mm ignava (p. 29). 



gK. Nasals relatively long and narrow; width at posterior end in males 

 less than 11 mm. 



h. Size larger; nasals longer, extending considerably back of posterior 



end of premaxillae rufescens (p. 25). 



Size smaller; nasals shorter, extending little, if any, back of pos- 

 terior end of premaxillae petrensis (p. 33). 



DESCRIPTIONS OF AMERICAN SPECIES AND SUBSPECIES. 

 Marino ta monax Group. 



[CMracters under species.] 

 MAEMOTA MONAX (Linnaeus). 

 [Synonymy under subspecies.] 



External characters. — Size medium;^ tail relatively short (about 20 

 to 25 per cent of total length); ears large; posterior pad on sole of 

 hind foot oyal in shape and situated near middle of sole (see PI. 

 Ill, fig. 3); mammae — ^P. f, A. ^, I. ^ = 8; head without white 

 markings (except around nose) ; sides of neck same color as upper- 

 parts; feet black or dark brown; fore legs overlaid with deep reddish- 

 colored hairs (hazel to burnt sienna) ; tail black, dark bro^\ai, or (in 

 ochracea) pinkish cinnamon. 



Cranial characters. — ^Skull with superior outline nearly straight, the 

 occipital region shghtly depressed and rostrum considerably but not 

 abruptly depressed from about posterior border of premaxillae; brain- 

 case broad and noticeably flattened; interorbital region relatively 

 broad; postorbital processes heavy, projecting nearly at right angles 

 to axis of skull or slightly forward; width of nasals at posterior end 

 usually decidedly greater than width of nasal branches of premaxillae; 

 temporal ridges often not meeting in old age, or sometimes meeting 

 but not united (rarely fused into a sagittal crest) ; floor of basi-occipital 

 nearly fiat, bordered on each side by low processes vv^hich converge 

 posteriorly and sometimes meet near inferior hp of foramen magnum; 



lAudubon and Baehman give the weight of one as 9 pounds 11 ounces; a writer in Forest and Stream, 

 LV, p. 424, gives the average weight of 15S as 10 pounds; heaviest, 13J pounds. 



