Synopsis of the Voles of the Genus Phenacomys. 85 



skinning): total length, 138 ; tail vertebrae, 31 ; hind foot, 19" (Merriam). 

 Type of /'. celatus " (from alcoholic specimen before skinning) : total 

 length about 130; tail vertebrae, 32; hind foot, 17.5" (Merriam). In 

 adult male from Godbout, Quebec (topotype of celatus), in alcohol : total 

 length, 137 ; tail vertebra?, 32 ; hind foot, 18. Ten adults from Hamilton 

 Inlet, Labrador: average, total length, 151; tail vertebrae, 37; hind foot, 

 20; maximum, total length, 160; tail vertebrae, 44; hind foot, 21. 



Specimens examined. Total number, 19. 



Labrador: Fort Chimo, Ungava, 1 (type); Hamilton Inlet, 16; Gros- 

 water Bay, 2 (skulls). 



Quebec: Godbout 4 (including type of celatus}. 



General remarks. Phenacomys ungava is distinguished from P. latimanus, 

 the only other known species with yellowish face, by its larger size and 

 strongly ridged interorbital region. The specimens from Hamilton Inlet 

 average considerably larger than the type of P. ungava or the two adults 

 from Godbout, Quebec, but as they agree in all other characters it seems 

 unwise to separate them on the basis of the material now at hand. This 

 series shows individual variation sufficient to cover the supposed differ 

 ences betw r een P. ungava and P. celatus. 



Phenacomys longicaudus True. 



Phenacomys longicaudus True, Proc. U. S. National Museum, XIII, p. 303, 

 November 15, 1890. 



Type locality. Marshfield, Coos County, Oregon. Type in U. S. National 

 Museum (young adult No. MtH)- 



Geographic distribution. The species is at present known from two speci 

 mens only, the type and one from Meadows, Lane County, Oregon. It 

 probably ranges throughout the densely forested coast district of Oregon- 



General characters. Size large ; tail about 40 percent of total length ; 

 color rusty brown or drab. 



Color. Type (taken in August, 1890) ; head, back, and sides rusty 

 brown, slightly duller along middle of back, the fur everywhere dark 

 plumbeous at base and sprinkled with long blackish hairs, which, how 

 ever, are not noticeable except on close examination ; ventral surface 

 rusty white, the plumbeous bases of the hairs showing through irregularly ; 

 tail unicolor, dark brown both above and below ; feet dusky. The Lane 

 County specimen ( 9 No. f I? , U. S. National Museum, Biological Sur 

 vey collection), taken on April 13, 1891, is wholly unlike the type in color. 

 Head, back, and sides pale yellowish drab, the fur light bluish plumbe 

 ous at base and sprinkled with inconspicuous dark hairs ; belly grayish 

 white, the bluish bases of the hairs showing through irregularly ; tail in 

 distinctly bicolor, light slaty gray above and at tip, whitish mixed with 

 gray below ; feet silvery white. 



Skull. The skull of the type is in fragments, and that of the Lane County 

 specimen cannot now be found, hence the cranial characters of Phenacomys 

 longicaudus are at present unknown. 



19 HJOL. Soc. WASH., VOL. XI, 1897 



