330 MACROOEOMYS. ZYGOGEOMYS. 



332. costaricensis (Macrogcomys), Merr., N. Am. Faun., No. 8, 



1895, p. 192, pis. and figs. 

 PACUARE POCKET GOPHER. 



Type locality. Pacuare, Costa Rica? 



Geogr. Distr. Range unknown. 



Genl. Char. Unique specimen immature. Skull similar to that of 

 M. dolichocephalus, but with broader nasals; zygomata standing at 

 nearly right angles to axis of skull, the anterior angle abruptly 

 rounded; jugal narrower; pterygoids shorter and broader; audital 

 bullae disk-shaped and separated by a groove from the bullae. 



Color. Above dark brown; under parts whitish; a large white 

 patch on top of head between eyes and ears. 



Measurements. Total length, 330; tail about 80; hind foot, 33, 

 without claw. Skull: basal length, 48.5; Hensel, 44.5; zygomatic 

 width, 33; interorbital width, 9; length of upper molar series, 13; 

 length of single half of mandible, 37. 



333. cherrii (Geomys), Allen, Bull. Am. Mus. Nat. Hist., 1893, 



P- 337- 

 CHERRIE'S POCKET GOPHER. 



Type locality. Santa Clara, Costa Rica. 



Geogr. Distr. Costa Rica; range unknown. 



Genl. Char. Nasal pad, tail, and hind feet naked; white head 

 patch. Skull differs from that of M. costaricensis in certain par- 

 ticulars, such as the jugal, which is large and long and is not covered 

 by the maxillary arm of the zygoma; in the horizontal part of the 

 zygomatic arch not being strongly convex upward, and has not the 

 constriction between the orbital and temporal fossa; and the orbito- 

 temporal fossae are broadest at the middle instead of being narrowest. 



Color. Above chocolate or sooty brown, except a large white 

 patch on crown; throat, breast, and inner side of limbs dusky grayish; 

 rest of under parts grayish buff; tail and feet naked, reddish. 



Measurements. Total length, 275; tail, 80; hind foot, 40. Skull: 

 basal length, 47.5; Hensel, 44; zygomatic width, 34; interorbital 

 width, 9.5; length of upper molar series, 12; length of single half of 

 mandible, 37. 



69. Z> gogfomys. Zygomata Porket Gophers. 



Zygogeomys Merr., Mon. Geomyidae, N. Am. Faun., No. 8, 1895, 

 p. 195, pis. and figs. Type Zygogeomys trichopus Merriam. 



