SIGMODON. 225 
the body; feet grayish brown; tail naked, blackish above, paler 
beneath. 
Measurements. Total length, 275; tail, 115; hind foot, 30. 
Skull: basal length, 29; zygomatic breadth, 18; length of nasals, 12; 
length of upper tooth row, 5.5. 
hispidus chiriquensis. 
boruce chiriquensis (Sigmodon), Allen, Bull. Am. Mus. Nat. Hist., 
TOO4. Pp. 66. 
BoOQUERON CoTTOoN Rat. 
Type locality. Boqueron, Chiriqui, Panama. 
Genl. Char. Similar to S. h. saturatus, but bulla more pyriform 
and postpalatal opening much broader. 
Color. Like S.h. boruce but darker; upper parts dark yellowish 
brown varied with black; under parts buffy; nose and sides of upper 
lip ochraceous buff. 
Measurements. Total length, 280; tail vertebra, 105; hind foot, 
peiear, 20. 
hispidus saturatus (Sigmodon), Bailey, Proc. Biol. Soc. Wash., xv, 
1@O2, P: ITI. 
Teapa Cotton Rat. 
Type locality. Teapa, State of Tabasco, Mexico. 
Geogr. Distr. States of Chiapas, Tabasco, and southern Vera 
Cruz, Mexico. 
Genl. Char. Size of S. h. berlandier1; tail shorter. 
Color. Above dark reddish brown; beneath dull cinnamon 
brown, sometimes whitish; hands and feet yellowish brown; tail 
above black, lighter below. 
Measurements. Total length, 250; tail vertebrae, 103; hind foot, 
31.2. Skull of type: basal length, 29.5; nasals, 12.7; zygomatic 
breadth, 19; mastoid breadth, 13.5; alveolar length of upper molar 
series, 6. (Bailey, |. c.) 
hispidus furvus Bangs, Bull. Mus. Comp. Zool., 1903, XXXIX, p. 158. 
Ce1Ba Cotton Rat. 
Type locality. Ceiba, Honduras. 
Genl. Char. Similar to S. h. saturatus, but darker. Skull with 
audital bulla wider and flatter, basioccipital longer and narrower. 
Color. Upper parts between mummy brown and_ burnt 
umber, varied with brownish, black-tipped hairs, redder on rump; 
under parts ochraceous; feet and hands dark brown; tail black, the 
under side slightly paler; ears blackish. 
Measurements Total length, 265; tail vertebrae, 105; hind foot, 
with claw, 32; ear from notch, 18. Skull: basal length, 31.4; 
