216 NYCTOMYS. 



192. sumichrasti (Hesperomys), Sauss., Rev. Mag. Zool., 2me Se"r., 



1860, p. 107, pi. 9, fig. 2. 

 SUMICHRAST'S VESPER RAT. 



Type locality. "Habite le versant oriental de la Cordiliere, " 

 State of Vera Cruz, ? Mexico. 



Geogr. Distr. Eastern Mexico, State of Vera Cruz to Isthmus of 

 Tehuantepec. 



Genl. Char. Ears long, higher than wide; nose pointed; hind 

 feet short. 



Color. Upper parts isabella or pale orange, clearer on flanks; 

 under parts, chin, and lower jaw on side of face pure white; tail 

 brownish red; feet pale yellowish brown. 



Measurements. Total length, 230; tail, 106; hind foot, 23. Skull: 

 occipito-nasal length, 58; Hensel, 49; zygomatic width, 30.5; inter- 

 orbital constriction, 10; length of nasals, 16; palatal length, 25; 

 length of upper molar series, 10. 



193. decolorus (Sitomys), True, Proc. U. S. Nat. Mus., xvi, 1894, p. 689. 

 FADED VESPER RAT. 



Type locality. Rio de las Piedras, Honduras. 



Geogr. Distr. Tehuantepec, Mexico, into Honduras, Central 

 America. 



Genl. Char. Similar to R. sumichrasti, but paler, tail shorter; 

 ear naked, prominent; soles naked; tail covered with long hairs. 



Color. Above brownish isabelline, middle of back washed with 

 gray; under parts and cheeks white; orbital ring dark brown; tail 

 chocolate brown; hands like back, feet dusky, toes whitish; ears 

 chocolate brown. 



Measurements. Total length, 193; tail vertebrae, 85; hind foot, 

 23; ear, 14. 



194. nitellinus (Nyctomys), Bangs, Bull. Mus. Comp. Zool., xxxix, 



1902, p. 30. 

 BOQUETE VESPER RAT. 



Type locality. Boquete, Chiriqui, Panama. Altitude, 4,000 

 feet. 



Genl. Char. Similar to R. decolorus, but larger and darker. 



Color. Above yellowish cinnamon, dorsal region darker; lower 

 sides shaded with orange buff ; orbital ring, and space between eyes 

 and nose black; under parts white; tail blackish, unicolor; hands 

 white; feet, toes, and sides of tarsus white; middle of tarsus dark 

 brown; ears dusky. 



