7G6 MONOGRAPHS OF NORTrT AMERICAN RODENTIA. 



SCIURUS GERRARDI Gray. 

 Gcrrard's Squirrel. 



Sciurus gerrardi GiiAY, Proe. Zool. Soc. Lond. 1861, 92, pi. xiv (New Granada). 



Macroxua gerrardi Gkay, Ann. and Mag. Nat. Hist. 3d ser. xx, 1867, 430. 



Macroxut brunneo-niger Castki.nait, MS.— Gray, Ann. and Mag. Nat. Hist. 3d ser. xx, 1867, 429 (Brazil). 



Macroxut santhotus Gray, Ann. and Mag. Nat. Hist. 3d ser. xx, 1867, 429 (Costa Rica). 



t Macroxua iyniius GRAY, Ann. and Mag. Nat. Hist. 3d ser. xx, 1867, 429 (Bolivia). 



Specific chars. — Intermediate in size between Sciurus variabilis and 

 Sciurus <?duans var. rufoniger. Length of body from end of nose to base of tail 

 about 9.50 ; of tail-vertebra; about 8 00 ; of tail to end of hairs about 10.00 to 

 10.50; of liindfoot about 2.25. Top of the head and middle region of dorsal 

 surface black or dusky ; rest of dorsal surface varied with yellowish-rufous and 

 black ; below, deep reddish-brown or bright reddish-orange ; outer sid-e of the 

 limbs sometimes like the ventral surface, sometimes like the dorsal surface; 

 in some specimens, dark fiery red-brown, darker than the ventral surface. Tail 

 rather full and bushy, the base of the hairs yellowish-brown, with narrow 

 rings of black; a broad subterminal black bar, broadly tipped with reddish- 

 golden, varying to dark fiery-red. Pelage short and sparse, especially below. 



To this species I refer three badly prepared skins from Nercua, New 

 Granada, and four specimens in alcohol from near Obispo, Panama, two of 

 which are evidently not of adult size. The three Nercua specimens vary in 

 color below from dark reddish-orange to dark reddish-brown. In two, the 

 middle of the back is black, the rest of the dorsal surface being varied with 

 yellowish-rufous and black, the former color prevailing. The hairs individu- 

 ally are dusky at the base, with a broad subterminal yellowish-rufous bar, 

 and tipped with black. In one of the specimens, the black band along the 

 middle of the back is narrow and not well defined. In one, the whole upper 

 surface of the head, including the sides of the nose, is nearly as dark as the 

 middle of the back ; in the others, the head is varied with yellow and black. 

 In one, the surface of the tail is reddish-golden; in another, red; and in the third, 

 dark cherry-red. Of the Panama specimens, one (No. 3224, adult male) is 

 deep red above, blackish on the occiput and rump, and pale red below, with 

 the tail black at the base and tip, and the middle half red. Another (No. 

 3H44, a young female) is dusky above, varied with reddish-yellow, and 

 bright fermgineous below, with the tail black, the middle half broadly edged 

 with red. No. 321G (also an immature female) is similar to the last, but is 



