320 PLATOGEOMYS. PAPPOGEOMYS. 



NEGLECTED POCKET GOPHER. 



Type locality. Mount Cerro de la Calentura, eight miles northwest 

 of Final de Amoles, State of Queretaro, Mexico. Altitude, 9,000 feet. 



Genl. Char. "Size small for a Platygeomys; general appearance 

 and characters as in P. planiceps, but color paler and duller (less 

 chestnut); size smaller; rostrum and nasals shorter; frontal flat inter- 

 orbitally (not elevated on each side over t the orbits) ; zygomatic 

 arches parallel (instead of strongly divergent anteriorly) ; jugal light 

 and slender, its faces not strongly developed." 



Measurements. Type. "Total length, 310; tail vertebrae, 96; 

 hind foot, 42." (Merr., 1. c.) 



65. Pappogeomys. Ancient Pocket Gophers. 



Pappogeomys Merr., Mon. Geomyidas, N. Am. Faun., No. 8, 1895, 



p. 145, pis. and figs. Type Geomys bidleri Thomas. 

 Molars with enamel pattern of Geomys, and the incisors unisulcate, 

 as in some other genera, i. e., Cratogeomys, etc. Sphenoid fossa 

 shortened by the orbitosphenoids ; mesethmoid higher than long, and 

 with the lower edge extending between wings of vomer posteriorly; 

 zygomata slender; upper premolar with but three enamel plates; 

 first and second upper molars with two enamel plates each; last 

 upper molar has a single exterior sulcus; upper incisor with a single 

 deep median sulcus. 



KEY TO SPECIES. PAGE 



A. Size small; tail naked; occiput extending con- 

 siderably beyond lambdoidal suture. 



a. Above rusty chestnut, beneath paler ........... P. bulleri 320 



b. Above pale plumbeous tinged with chestnut ; 



beneath paler ............................ P. albinasiis 321 



320. bulleri (Geomys}, Thomas, Ann. Mag. Nat. Hist., 6th Ser., x, 

 1892, p. 196, August. 



nelsoni Merr., Proc. Biol. Soc. Wash., 1892, p. 164, September. 

 BULLER'S POCKET GOPHER. 



Type locality. Near Talpa, west slope of Sierra de Mascota, State 

 of Jalisco, Mexico. Altitude, 8,500 feet. 



Geogr. Distr. State of Jalisco, Mexico. 



Genl. Char. Size small; tail naked; occiput extending consid- 

 erably behind lambdoidal suture; nasals narrow; premaxillae short, 

 rounded posteriorly, and just reaching plane of orbits. 



Color. Above rusty chestnut ; under parts paler. 



