HETEROMYS. 373 



14.8; interorbital width, 9.2; length of nasals, 14.8; width of nasals, 

 4.2; upper molar series, 4.8; length of single half mandible, 17.2; 

 (Bangs, 1. c.) 



384. goldmani (Hctcromys), Merr., Proc. Biol. Soc. Wash., xv, 1902, 



P- 41- 

 GOLDMAN'S SPINY RAT. 



Type locality. Chicharras, State of Chiapas, Mexico. 



Genl. Char. Size large; tail longer than head and body, naked; 

 sole of hind foot with 6 pads. 



Color. Above dusky gray, head and back darkest; upper lip, 

 inner side of limbs, hands, and feet and under parts white; tail dusky 

 above, paler below, tip whitish; ears without white edges. 



Measurements. Total length, 347; tail vertebrae, 199; hind 

 foot, 40. 



a. leptuvus (Heteromys), Merr., Proc. Biol. Soc. Wash., xv, 1902, 



p. 42. 

 SHORT-TAILED SPINY RAT. 



Type locality. Mountains near Sant</T)omingo, State of Oaxaca, 

 Mexico. 



Genl. Char. Similar to H. goldmani, but smaller and not so black. 



Color. "Head and back, grizzled with fulvous; nose and ankles 

 dusky by contrast; hind feet and tail decidedly shorter; rostrum 

 broader, broadening gradually to zygomata with much less of the 

 usual notch." 



Measurements. "Total length, 340; tail vertebrae, 191; hind foot, 

 39." (Merr., 1. c.) 



385. griseus (Hctcromys), Merr., Proc. Biol. Soc. Wash., xv, 1902, 



p. 42. 

 GRAY SPINY RAT. 



Type locality. Mountains near Tonala, State of Chiapas, Mexico. 



Genl. Char. Size large; hind foot 6-tuberculate. 



Color. Above drab, grizzled with black; upper lip, hands, feet, 

 and under parts white; tail above dusky, beneath whitish, tip dark 

 all around; faint buff lateral line on head and body; ears without 

 white edging. 



Measurements. Total length, 325; tail vertebrae, 186; hind 

 foot, 38. 



386. adspersus (Hctcromys), Peters, Monatsb. K. Preuss. Akad. 



Wiss. Berl., 1874, p. 357. 

 SPOTTED SPINY RAT. 



Type locality. Panama. 



