SYNAPTOMYS. 



Fig. 45. Synaptomys cooperi. 



No. 350 Field Columbian Museum Coll. Nat. size. 



Lower tooth row. Upper tooth row. 



Enlarged 5 times. Enlarged 5 times. 



Color. Above mixed grizzled gray and yellowish brown, lined 

 with black; under parts whitish. Tail brown above, whitish below. 



Measurements. Total length, 118; tail vertebrae, 17.5; hind 

 foot, 18. 



305. fatuus. [Synaptomys), Bangs, Proc. Biol. See. Wash., 1896, p. 47. 

 Type locality. Lake Edward, Prov. Quebec, Canada. 



Geogr. Disir. Lake Edward to Victoria County, New Bruns- 

 wick, and Godbout, Quebec, and west to Peninsula Harbor, north- 

 eastern Lake Superior, Ontario. 



Genl. Char. Similar to S. cooperi, but smaller; upper incisors 

 narrower. 



Color. Above grizzly yellowish brown mixed with black; under 

 parts whitish or slate gray, tinged with buff on the belly; feet drab. 

 Tail slightly paler beneath. 



Measurements. Total length, 124; tail vertebrae, 18; hind 

 foot, 18.7. 



306. helaletes. (5i7;a//<7/««.f), Merr., Proc. Biol. Soc.Wash.,i8g6,p.59. 

 Type locality. Dismal Swamp, Virginia. 



Geogr. Disir. Only known from type locality. 



Genl. Char. Similar to .S. cooperi, larger feet and head, longer 

 tail; rostrum and mandible broader. 



Color. Above yellowish brown and grizzled gray mingled with 

 black; under parts whitish gray. Tail brownish above, whitish below. 



Measurements. Total length, 125; tail vertebrae, 22; hind foot, 20. 



a.—gossii. {Synaptomys), Merr., Proc. Biol. Soc. Wash., 1896, p. 60. 

 Type locality. Neosho Falls, Kansas. 

 Geogr. Distr. Kansas, limits of range undetermined. 



