10 CALUROMYS. 
Geogr. Distr. Nicaragua in Central America to Peru in South 
America. 
Genl. Char. Tail longer than head and body, furred for one- 
third of its length. 
Color. Upper parts, sides, and outer side of limbs brownish rust 
color; under parts soiled white; head brownish gray with a median 
dusky stripe from forehead to nose; orbital region brown; gray dorsal 
stripe from between shoulders to root of tail; gray line behind fore- 
arms and one on leg from knee upward; lower part of arms and 
Fic. Ill. CALUROMYS DERBIANUS. EARL OF DERBY’S OPOSSUM. 
hands white; feet dusky; tail brown on basal portion, naked part 
pinkish spotted with dark brown; ears pale brown, naked. 
Measurements. Total length, 765; tail, 425; hind foot, 47.5; 
ear, 30. 
laniger pallidws (Philander), Thomas, Ann. Mag. Nat. Hist., 7th 
Ser., Iv, 1899, p. 286. 
PaLeE Woo_Lty Opossum. 
Type locality. Bogava, Chiriqui, Panama. Altitude, about 750 
feet. 
Geogr. Distr. Southeastern Central America. 
Color. Above pale gray or pale rufous; face brownish; forearms, 
shoulders, and sides of hips pale gray; hind legs whitish or tinged 
with rufous; tail whitish gray, naked part mottled. 
Measurements. Total length, 587; tail, 398; hind foot, 43; ear, 32. 
Skull: ‘“‘Greatest length, 61; greatest breadth, 35; length of upper 
molars, 9.”’ 
