MILLER AND REHN: NORTH AMERICAN MAMMALS. 27 
Sciurus poliopus effugius (Nelson). 
1898. Sciurus albipes effugius Nelson, Proc. biol. soc. Wash¬ 
ington, XII, p. 152. June 3, 1898. 
1899. Sciurus poliopus effugius Nelson, Proc. Washington 
acad. sci., i, p. 54. May 9, 1899. 
Type locality. — High mountains west of Chilpancingo, 
State of Guerrero, Mexico. 
Sciurus nelsoni Merriam. 
1893. Sciurus nelsoni Mekriam, Proc. biol. soc. Washington, 
VIII, p. 144. December 29, 1893. 
Type locality. — Huitzilac, State of Morelos, Mexico. 
Sciurus nelsoni hirtus Nelson. 
1898. Sciurus nelsoni hirtus Nelson, Proc. biol. soc. Wash¬ 
ington, XII, p. 153. June 3, 1898. 
Type locality.— Tochimilco, State of Puebla, Mexico. 
Sciurus colliaei Richardson. 
1839. Sciurus colliaei Richardson, Voy. H. M. S. Blossom; 
zool., p. 8. 
Type locality. — San Bias, State of Topic, Mexico. 
Sciurus colliaei nuchalis Nelson. 
1899. Sciurus colliaei nuchalis Nelson, Proc. Washington 
acad. sci., i, p. 59. May 9, 1899. 
Type locality. — Manzanillo, State of Colima, Mexico. 
Sciurus sinaloensis Nelson. 
1899. Sciurus sinaloensis Nelson, Proc. Washington acad. 
. sci., i, 2^. 60. May 9, 1899. 
Type locality. — Mazatlan, State of Sinaloa, Mexico. 
Sciurus truei Nelson. 
1899. Sciurus truei Nelson, Proc. Washington acad. sci., 
i, p. 61. May 9, 1899. 
Type locality. — Camoa, Rio Mayo, State of Sonora, Mexico. 
Sciurus socialis Wagner. 
1837. Sciurus socialis Wagner, Abhandl. math.-phys. Cl. 
k. bayerisch. Akad. Wiss. Miinchen, ii, p. 504. 
Type locality. — Vicinity of Tehuantepec City, State of 
Oaxaca, Mexico. 
