b'2 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 undcrparts 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, 

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

 in Field Museum of Natural History. 



Genus Heterogeomys (91). 

 Distinct Pocket Gophers. 



66ia. Heterogeomys lanius Elliot. 



Heterogeomys ianius IClliot, Proc. Biol. Soc. Wash., XVIII, 1905, 

 P- 235. 



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



Geogr. Dislr. Known only from type locality. 



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

 very heavy; nasals long, widening greatly anteriorly; zygomata 

 1 in ^nl anteriorly; palatal arch pointed but not acute; pterygoids 



