326 HETEROGEOMYS. MACROGEOMYS. 
part of optic foramen disappearing in advanced life; squamosal 
expansion slight; fronto-maxillary suture reaching orbit in front of 
lachrymal. (ex Merr., 1. c.) 
KEY TO THE SPECIES. vce 
A. Nasals long, narrowing rapidly posteriorly; 
zygomata not greatly spreading................ H.lispidus 326 
B. Nasals shorter, broader posteriorly; zygomata 
MGR y SprGndine.... .voeeeeete ss ss. os H. torridus 326 
326. hispidus (Heterogeomys), Le Conte, Proc. Acad. Nat. Scien. Phil., 
1852, p. 158, pls. and figs. 
HARSH-COATED PocKET GOPHER. 
Type locality. Near Jalapa, State of Vera Cruz, Mexico. 
Geogr. Distr. State of Vera Cruz, Mexico, at 4,000 to 4,500 feet 
altitude. 
Genl. Char. Size large; upper incisors with one deep sulcus each 
on inner side; nose pad and tail naked. 
Color. General hue above dark seal brown; under parts slightly ~ 
paler. 
Measurements. Total length, 345; tail vertebra, 92; hind foot, 
47.3. Skull: basal length, 55-57.5; Hensel, 51-53; zygomatic width, 
36-45; interorbital width, 1o—11.5; length of upper molar series, 
13.5-14; length of single half of mandible, 38—42. 
327. torridus (/Heterogeomys), Merr., Mon. Geomyide, N. Am. Faun.. 
No. 8, 1895, p. 183, pls. and figs. 
TrRopicAL Pocket GopHER. Tultusia in Guatemala. 
Type locality. Chichicaxtle, State of Vera Cruz, Mexico. 
Geogr. Distr. Lowlands, State of Vera Cruz, through States of 
Oaxaca and Chiapas, Mexico, into Guatemala. 
Genl. Char. Similar to H. hispidus; size large. Skull broad 
and heavy. 
Color. Dark seal brown, slightly paler below. 
Measurements. Total length, 323; tail vertebrae, 88; hind foot, 
52. Skull: basal length, 54-60; Hensel, 50-55.5; zygomatic width, 
37-43.5; interorbital breadth, 10.5—11; length of upper molar series, 
13—14.5; length of single half of mandible, 38-42. 
68. Macrogeomys. Large Size Pocket Gophers. 
l=; P.—; i= 20. 
Macrogeomys Merr., N. Am. Faun., No. 8, 1895, p. 185, pls. and 
figs. Type Geomys heterodus Peters. 
Size large; large naked nasal pad; tail naked; pelage silky. Skull: 
