204 Fretp Museum or Natura. History — Zo6étocy, Vor. XI. 
have found nests of this species suspended on a branch of interlaced 
marsh grass. (J. c¢., p. 215.) According to Howell the species is par- 
ticularly abundant in the marshes on the coast of Alabama. The 
young generally number from four to five and the majority are born 
in April. 
Subfamily NEOTOMINE. 
This is a small subfamily confined to North America. The molars 
are not tuberculate but the crowns have irregular enamel loops. 
Genus NEOTOMA Say & Ord. 
Neotoma Say & Ord., Jour. Acad. Nat. Sci. Phila., IV, Pt. 2, 1825, p. 
345. Type Mus floridanus Ord. 
Crowns of grinding teeth (molars) with irregular loops; first and 
second upper molars with middle enamel loops undivided (for illustra- 
tion see p. 173.); third lower molar with two transverse enamel loops 
bullz oblique and tapering anteriorly; eyes and ears large; tail covered 
with hair; size large for the family. Three subgenera are recognized, 
but only one of them, represented by a single species, occurs within 
our limits. 
Dental formula: I. Oe MO Re. 
I-I o-o0 3-3 
Subgenus NEOTOMA Say & Ord. 
Tail covered with hair but not bushy; “maxillary toothrow much 
narrower posteriorly than anteriorly; middle lobe of last upper molar 
not divided by inner re-entrant angle’? (Goldman). 
Neotoma floridana illinoensis Howe Lt. 
Ittinois Woop Rat. 
Neotoma floridana illinoensis HOWELL, Proc. Biol. Soc. Wash., XXIII, 1910, p. 28 
(Union Co., southern Illinois). Gotpman, N. Amer. Fauna, No. 31, 1910, p. 
23 (southern Illinois to northeastern Kansas). 
Type locality — Wolf Lake, Union County, southern Illinois. 
Distribution — Southern Illinois to northeastern Arkansas; limits of 
range not definitely known. 
Special characters — Cranial characters resembling floridana, but with 
zygomata more abruptly spreading and with posterior border of 
palate emarginate; approaches NV. f. rubida in size but general color 
grayer and tail more distinctly bicolor. 
