SCIURIDAS—SCIURUS AUSTUANS. 
761 
ties, ranges from Southern Brazil northward to Costa Rica, and from the 
Atlantic coast westward to the eastern base of the great Andean chain. Var. 
@stuans ranges throughout Brazil, extending westward to Eastern Bolivia and 
northward to Guiana, but it seems to be nowhere common. 
Var. rufoniger 
extends over the northern states of South America, including Venezuela, New 
Granada, and probably portions of Ecuador, and thence southward to Eastern 
Peru. In Costa Rica, it seems to be one of the most abundant of the Sciuri. 
TabLe LII.—Measurements of eighteen specimens of SCIURUS ZSTUANS var. STUANS. 
* . 
8 Tail to end 8 
3 From tip of nose to— ee Length of— & 
Z gull ae 
5 Locality. : : ; s ee 
5 S g 3 S S i) 
Ep 5 ea eer || Seca) Sota tae 2 
= . % = : 3 3 = 5 
2 Be seme Ss Spu lisa ei |r weve thee = 
1S) a| sa A °o a e is i= is asl a 
4060 --| o | 0.97 | 1.70 | 2.12 | 7.75 | 7.00 | 9.00 | 1.25 | 1.90 | 0.60 | Alcoholic. 
4062 --| 9 | 0.95 | 1.77 | 2.20 | 7.65 | 7.25 10.55 | 1.22 | 1.88 | 0.58 |..-.do. 
4061 o | 0.90 | 1.60 | 1.95 | 6.280 | 6.80 | 9.15 | 1.25 | 1.23 | 0.60 --do. 
4059 do | 0.95 | 1.70 | 2.15 | 7.50 | 7.25 | 9.00 | 1.23 | 1.90 | 0.64 -. do. 
4063 |...-.- GID) ceindiocions See sacs ea cOn eS OTTER: O| 0.72 | 1.35 | 1.50 | 5.50 | 5.25 | 6.75 | 1.20 | 1.90 | 0.52 |....do. 
3850 | Rio de Janciro, Brazil..........-...----- OG| 0.72 | 1.35 | 1.72 | 5.85 | 6.45 | 8.20 | 1.25 | 1.85 | 0.67 .-do. 
4102 | San Matheos, Brazil ........- Q | 0.95 | 1.70 | 2.12 | 7.80 | 7.50 ]...... 1.25 | 1.93 | 0.70 | ...do. 
3960 | Rio de Janeiro, Brazil -| 2 | 0.90 | 1.85 | 2.23 | 7.60 | 7.50 | 9.00 | 1.37 | 2.05 | 0.68 |....do. 
3933 | Obydos, Brazil -| o' | 0.87 | 1.60 | 2.00 | 7.05 |. -...|....-. 1.15 | 1.80 | 0.57 |....do. 
1246 | Rio de Janeiro.........-...--.-.--2---- o | 0.80 | 1.67 | 2.00 | 7.30 | 6.75 | 9.10 | 1.20 | 1.75 | 0.62 -.do. 
1247 9 | 1.05 | 1.65 | 2.15 | 7.75 | 7.00 | 8.75 | 1.15 | 1.95 | 0.60 do, 
1250 -|OP| 0.83 | 1.60 | 1.85 | 6.30 | 5.75 | 8.05 | 1.17 | 1.90 | 0.57 -do. 
4235 9 | 0.92 | 1.53 | 2.00 | 7.05 | 7.00 |...-.. 1.35 | 2.05 | 0.70 |... do. 
4236 9 | 0.98 | 1.77] 205 | 810 | 7.50)...... 1.54 | 2.00 | 0. 67 do. 
4237 Q | 0.87 | 1.68 | 2.07 | 7.00 | 6.80 ]....-. 1.35 | 1.98 | 0.65 ‘do. 
4258 o | 0.80 | 1.50 | 1.98 | 6.50 | 7.80 ]...-.- 1.30) 2.10 | 0.72 |....do. 
1833 | Santa Rita, Brazil. -| o& | 0.92 | 1.50 | 1.96 | 7.50 | 7.20} 9.80 | 1.25 | 1.85 |...... Skin. 
Pe) |) UMS oe act CEO SE CEG esoROsaced ac 0.90 | 1.70 | 1.95 | 8.20 | 7.25 | 9.50 27 | 1.90 |..--.-}.-.. do. 
*In National Museum, Washington, D.C.; all the others in Museum of Comparative Zoélogy, Cambridge, Mass. 
