426 LEPUS. 
white above; hind legs white; tail above like rump, beneath, white; 
ears pale yellowish brown and black, edged with white. 
Measurements. Total length, 420; hind foot, 50; ear, 50. Skull: 
total length, 70; greatest width, 35; interorbital constriction, 18; 
length of nasals, 31; width of nasals posteriorly, 14; length of upper 
molar series, 12; length of lower jaw, 47. 
440. graysoni (Lepus), Allen, Mon. N. Am. Rodent., 1877, p. 347. 
Grayson’s Hare. 
Type locality. Maria Madre Island, Tres Marias Islands, State of 
Jalisco, Mexico. 
Geogr. Distr. Tres Marias Islands, State of Jalisco, Mexico. 
Genl. Char. Ear very short; colors pale. 
Color. Upper parts pale cinnamon brown mixed with blackish 
brown; sides and rump paler; throat brown, rest of under parts white; 
outer surface of legs reddish brown, inner surface whitish; ears yellow- 
ish brown mixed with black at base, blackish brown toward tip; tail 
above blackish brown, beneath white; orbital ring pale brown. 
Measurements. Total length, 388-433; tail vertebre, 19-25; hind 
foot, 88; ear, 57. Skull: occipito-nasal length, 75; Hensel, 60; zygo- 
matic width, 37; interorbital width, 18; median length of nasals, 24.5; 
lateral length of nasals, 30; posterior width of nasals, 14.5; anterior 
width of nasals, 9; palatal length, 30; length of upper tooth row, 13; 
length of mandible, angle to tip of incisors, 60; length of lower tooth 
row, I4. 
C. Tapeti. 
“Skull like that of Lepus, but the hinder supraorbital notch narrow, 
lobes short with a sharp inner edge; the front of the lower edge of the 
zygoma dilated, sharp-edged, porous above, hinder nasal opening 
rather narrow. ‘Tailnone. Earsshort.” (Gray,1.c.) 
KEY TO THESPEGIES: 
A. Ears very short; tail practically none. PAGE 
a. Upper parts cinnamon brown and black.......... L. gabbt 426 
b. Upper parts tawny ferrugineous and black..... L.incittatus 428 
441. gabbi (Lepus), Allen, Mon. N. Am. Rodent., 1877, p. 349. 
GaBB’s Hare. 
Type locality. Talamanca, Costa Rica. 
Geogr. Distr. Costa Rica. 
Genl. Char. Ears very short; tail practically none. 
Color. Above cinnamon brown and black; top of head yellow, 
ferrugineous, and black; sides of head yellowish brown varied with 
