SQUIRRELS OF MEXICO AND CENTRAL AMERICA 8 1 



Salvador, as shown by the original description, was typical 5*. varie- 

 gatoides\ this, w^ith the specimen in the U. S. National Museum, 

 definitely determines the region where the species is found. 

 Specimen examined. — One : from La Union, Salvador. 



SCIURUS MANAGUENSIS Nelson. Rio Managua Squirrel. 



Scturus boothicE managuensis Nelson, Proc. Biol. Soc. Washington, xii, p. 

 150, June 3, 1898. 



Type locality. — Managua River, Guatemala. Type no. 62476 U. S. 

 National Museum. 



Distribution. — Humid tropical forests along Managua River, north- 

 ern Guatemala. 



Characters. — Size of S. boothioe but yellower on dorsal surface 

 and uniformly light buffy yellow below. Pelage rather dense ; hairs 

 of back coarse, stiff and shining; tail long and narrow. Teats p. \ 



Colors. — Upperparts, including top of nose and base of tail coarsely 

 grizzled dull yellowish or grayish brown; crown and middle of back 

 washed with shining black; sides of body and outside of legs more 

 suffused with yellowish ; feet of type bright buffy yellow only slightly 

 grizzled (much more grizzled in two other specimens) ; ears edged 

 with black and tipped with thin tuft of rusty hairs ; basal patches con- 

 spicuous dull buffy yellow ; sides of head and chin dingy yellowish or 

 grayish brown ; underparts, varying from rich, almost reddish buffy 

 to dingy yellow; tail above black, thinly washed with white; below, 

 with broad median area varying from grizzled grayish brown shaded 

 with yellowish, to yellowish brown, bordered with black and edged 

 with white. Hairs on back black, with broad median rings of dull 

 yellowish buffy, or sometimes grayish. 



Variation. — Two of the three specimens examined. Including the 

 type, are distinctly suffused with yellowish on back and bright yellow 

 below ; the third specimen is pale brownish gray above and much 

 paler, dingier yellow below, but has the lower surface of tail slightly 

 shaded with rusty and the feet and back with only a slight suffusion of 

 yellowish. 



Measurements . — Average of 3 adults from type locality (from dried 

 skins) : total length 537, tail vertebrae 370; hind foot 63.7. 



Cranial characters. — Premolars \. Skull very similar to that of 

 S. aureogaster but somewhat narrower ; inner anterior border of audi- 

 tal bulla) more indented, as in S. booth ict. Two adult skulls from 

 the type locality average : basal length 50.3; palatal length 37 ; in- 



