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. 



borucae chiriquensis (Sigmodon), Allen, Bull. Am. Mus. Nat. Hist., 



1904, p. 68. 

 BOQUERON COTTON RAT. 



Type locality. Boqueron, Chiriqui, Panama. 



Gcnl. Char. Similar to S. h. saturatns, but bullae more pyriform 

 and postpalatal opening much broader. 



Color. Like S. h. boruccz 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 vertebrae, 105; hind foot, 

 32; ear, 20. 



liixjtidiiN sitturatus (Sigmodon), Bailey, Proc. Biol. Soc. Wash., xv, 



1902, p. in. 

 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. berlandieri ; 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 vertebras, 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, 1. c.) 



liixjndus fuTi-us Bangs, Bull. Mus. Comp. Zool., 1903, xxxix, p. 158. 

 CEIBA COTTON RAT. 



Type locality. Ceiba, Honduras. 



Genl. Char. Similar to S. h. saturatns, but darker. Skull with 

 audital bullae 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: 



