28 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
Sciurus socialis cocos Nelson. 
1898. Sciurus socialis cocos Nelson, Proc. biol. soc. Wash¬ 
ington, XII, p. 155. June 3, 1898. 
Type locality. — Acapulco, State of Guerrero, Mexico. 
* Sciurus griseoflavus (Gray). 
1867. Macroxus griseoflavus Awn. and mag. nat. hist., 
3d ser., xx, p. 427. December, 1867. 
1878. Sciurus griseoflavus Alston, Proc. zool. soc. London, 
p. 660. 
1885. Sciurus griseoflavus True, Proc. TJ. S. nat. mus., vii 
(1884), p. 595. 1*885. 
Ty'pe locality. — Guatemala. 
Sciurus griseoflavus chiapensis Nelson. 
1899. Sciurus griseoflavus chiapensis Nelson, Proc.. Wash¬ 
ington acad. sci., i, p. 69. May 9, 1899. 
Type locality". — San Cristobal, State of Chiapas, Mexico. 
* Sciurus yucatanensis (Allen). 
1877. Sciurus carolinensis var. yucatanensis Allen, Monogr. 
N. Arner. rodentia, p. 705. August, 1877. 
1885. Sciurus carolmensis yucatanensis True, Proc. U. S. 
nat. mus., vii (1884), p. 595. 1885. 
1897. Sciurus yucataneyisis Allen, Bull. Amer. mus. nat. 
hist., IX, p. 5. February 23, 1897. 
Ty"pe LOCALITY". — Merida, Yucatan. 
Sciurus thomasi Nelson. 
1899. Sciurus thomasi Nelson, Proc. Washington acad. sci., 
I, p. 71. May 9, 1899. 
Type locality". — Talamanca, Costa Rica. 
Sciurus adolphei (Lesson). 
1842. Macroxus adolphei Lesson, Nouv. tabl. r^gne animal, 
mamm., p. 112. 
1899. Sciurus adolphei Nelson, Proc. Washington acad. 
sci., I, p. 73. May 9, 1899. 
Type locality. — Realejo, Nicaragua. 
Sciurus adolphei dorsalis (Gray). 
1848. Sciurus dorsalis Gray", Proc. zool. soc. London, p. 138. 
