1915.] Allen, Review of the South American Sciuride. 193 
Microsciurus isthmius vivatus Goldman. 
Microsciurus isthmius vivatus GOLDMAN, Smithson. Misc. Coll., LX, No. 2, p. 4, 
Sept. 20, 1912.— Aten, Bull. Amer. Mus. Nat. Hist., XX XIII, p. 158, Feb. 26, 
1914. 
Type locality— Near Cana, Pirri range, eastern Panama; altitude 3500 
feet. 
Geographic distribution Known only from the type locality. 
Microsciurus mimulus TJhomas. 
Sciurus (Microsciurus) mimulus THomas, Ann. and Mag. Nat. Hist. (7), I, p. 
266, Sept. 1898. 
Microsciurus mimulus ALLEN, Bull. Amer. Mus. Nat. Hist., X XXIII, p. 158, 
Feb. 26, 1914. 
Type locality. Cachavi, Esmeraldas, Ecuador; altitude about 665 feet. 
Geographic .distribution.— Coast region of northwestern Ecuador and 
southwestern Colombia. 
Microsciurus palmeri 7'homas. 
Sciurus (Microsciurus) palmert Tuomas, Ann. and Mag. Nat. Hist. (8), IV, p. 234, 
Sept. 1909. 
Microsciurus palmeri Auten, Bull. Amer. Mus. Nat. Hist., XX XIII, p. 160, 
Feb. 26, 1914. 
Type locality.— Sipi, Rio Sipi, tributary of Rio San Juan, Choco dis- 
trict, Colombia; altitude 150 feet. 
Geographic distribution.— Coast region (Chocé district) of western Co- 
lombia. 
Microsciurus simonsi Thomas. 
Sciurus (Microsciurus) simonst THomas, Ann. and Mag. Nat. Filet, Cg Wat De 
294, Sept. 1900. 
Microsciurus simonst AtLEN, Bull. Amer. Mus. Nat. Hist., XX XIII, p. 161, 
Feb. 26, 1914. 
Type locality Porvenir, near Zaparal, Bolivar province, Ecuador; 
altitude, 1500 m. (5000 feet). 
Geographic distribution.— Known only from the type locality. 
