132 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
Subgenus Stnaptomys Baird. 
* Synaptomys cooperi Baird. 
1857. S[ynaptomys\ cooperi Bated, Mamm. N. Amer., p. 558. 
1885. Synaptomys cooperi Tkue, Proc. U. S. nat. raus., Yii 
(1884/, p. 596. 1885. 
Type locality.— Unknown, probably northern New Jersey. 
Synaptomys fatuus Bangs. 
1896. Synaptomys fatuus Bangs, Proc. biol. soc. Washing¬ 
ton, X, p. 47. March 9, 1896. 
Type locality. — Lake Edward, Quebec, Canada. 
Pegarded by Rhoads (Proc. acad. nat. sci. Phila., 1897, p. 306, 
June, 1897) as a form of S. cooperi. 
Synaptomys helaletes Merriam. 
1896. Synaptomys helaletes Merriam, Proc. biol. soc. Wash¬ 
ington, X, p. 59. March 19, 1896. 
Type locality. — Dismal Swamp, Norfolk Count}^, Virginia. 
According to Rhoads (Proc. acad. nat. sci. Phila., 1897, p. 305, 
June, 1897), this should stand as Synapjtomys cooperi stonei 
(Rhoads) [Synaptomys stonei Rhoads, Amer. nat., xxvii, p. 53, 
January 11, 1893; type locality, Mays Landing, Atlantic County, 
New .Jersey). 
t/ / * • 
Synaptomys helaletes gossii Merriam. 
1896. Synaptomys helaletes gossii Merriam, Proc. biol. soc. 
Washington, x, p. 60. March 19, 1896. 
Type locality. —Neosho Falls, Woodson County, Kansas. 
According to Rhoads (Proc. acad. nat. sci. Phila., 1897, p. 307, 
June, 1897), this should stand as Synaptomys cooperi gossi. 
Subgenus Mictomys True. 
1894. Mictomys True, Diagnoses of new^ North American 
mammals, p. 2. April 26, 1894. (Reprint: Proc. LT. S. nat. mus., 
XVII, p. 242. November 15, 1894.) Type.— Mictomys innuitus 
True. 
