106 ISOTHRIX. CAPROMYS. 



Color. Top of head and median line of neck covered with dark 

 colored bristles, and from shoulders to rump by black-tipped spines 

 overlaying the general cinnamon-rufous color of the upperparts; 

 cheeks suffused with cinnamon-rufous; outer side of arms grayish 

 brown; outer side of legs blackish; underparts white; pectoral band 

 sometimes present ; inner side of metatarsus and three inner toes whit- 

 ish; outer side and two outer toes brownish; tail above blackish, 

 beneath whitish. Ex type in United States National Museum. 



Measurements. Total length, 391; tail, 153; hind foot, 54. 

 Skull: Occipito-nasal length, 55; Hensel, 40.4; zygomatic width, 

 29.2; intertemporal width, 13; length of nasals, 16.4; palatal length, 

 1 1. 8; length of upper molar series, 9.3; length of mandible, 29.1; 

 lower molar series, 10.2. Ex type in United States National Museum. 



Genus Isothrix. 



Isothrix Wagner, Arch, fur Naturgesc., 1845, Bd. I, p. 145. Type 

 Isothrix bistriata Wagner. 



Isothrix darlingi Goldman. 



Isothrix darlingi Goldm., Smith Misc. Coll., LX, 1912, No. 2, p. 12. 



Type locality. Marraganti (near Real de Santa Maria), Rio Tuyra, 

 eastern Panama. 



Color . Lips and muzzle mouse-gray ; white line at base of whiskers ; 

 nose and head on top to ears blackish; cheeks grayish brown, white 

 spot below eye; rest of upperparts ochraceous-buff and black under- 

 parts pale ochraceous-buff; limbs like upperparts; wrists, ankles and 

 feet grayish; tail blackish brown all around, covered with short, 

 upright whitish hairs. Ex type in United States National Museum. 



Measurements. Total length, 472; tail, 240; hind foot, 44. 

 Skull: Greatest length, 52.6; Hensel, 40.3; zygomatic width, 24.5; 

 intertemporal width, 13.4; length of nasals, 13.5; length of upper 

 molar series, 6.9; length of mandible, 27.6; length of lower molar 

 series, 11.3. Ex type in United States National Museum. 



Subfamily Caprornyinse. 

 Genus Capromys (103). 



Capromys pilorides relictus G. M. Allen. 



Capromys pilorides relictus G. M. Allen, Bull. Mus. Comp. Zool., 

 LIV, 1911, p. 207. 



Type locality. Casas Mountains, Nueva Gerona, Isle of Pines, 

 Cuba. 



