82 ORTHOGEOMYS. HETEROGEOMYS. 



Measurements. Total length, 270; tail, 88; hind foot, 32. Skull: 

 Occipito-nasal length, 47.2; Hensel, 40; zygomatic width, 29.6; inter- 

 temporal width, 6.3; length of nasals, 17.5; length of upper molar 

 series, 8.5; length of mandible, 29; length of lower molar series, 8.4. 

 Ex type in United States National Museum. 



Genus Orthogeomys (90). 

 Straight-headed Pocket Gophers. 



Orthogeomys cuniculus Elliot. 



Orthogeomys cuniculus Elliot, Proc. Biol. Soc. Wash., XVIII, 



iQ5> P- 2 34- 



Type locality. Yautepec, State of Oaxaca, Mexico. 



Geogr. Distr. Known only from type-locality. 



Genl. Char. Size medium; no nasal pad; hair scanty; pelage 

 rather harsh; tail long, naked; skull heavy; zygomata slender, nar- 

 rowest posteriorly; nasals long. 



Color. Upper and underparts vandyke-brown; flesh color of skin 

 visible through the scant pelage; hands, feet and tail flesh color. Ex 

 type in Field Museum of Natural History. 



Measurements. Total length, 330; tail, 95; hind foot, 44; ear, 7. 

 Skull: Total length, 59; Hensel, 50; zygomatic width, 26; inter- 

 temporal width, 12; palatal length, 26; median length of nasals, 23; 

 width anteriorly, 7; width posteriorly, 4; length of upper molar series, 

 8; length of mandible, 47; length of lower molar series, 8. Ex type 

 in Field Museum of Natural History. 



Genus Heterogeomys (91). 

 Distinct Pocket Gophers. 



66 1 a. Heterogeomys lanius Elliot. 



Heterogeomys lanius Elliot, Proc. Biol. Soc. Wash., XVIII, 1905, 

 P- 235. 



Type locality. Xuchil, State of Vera Cruz, Mexico. 



Geogr. Distr. Known only from type locality. 



Genl. Char. Size large; fur soft, woolly; color very dark. Skull 

 very heavy; nasals long, widening greatly anteriorly; zygomata 

 broad anteriorly; palatal arch pointed but not acute; pterygoids 



