158 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 



Sciurus (Echinosciurus) boothiae Gray. 



Seven specimens; Ceiba and Yarnca. 



This series is intermediate between true S. boothiae and S. boothiae belti 

 Nelson, two skins being typical of the former and two of the latter, with the 

 other three variouslj' intermediate. 



Sciurus (Baiosciurus) deppei Peters. 



Twenty-four specimens ; Ceiba and Yaruca. Among these skins there is a 

 wide range of individual variation in color, — from pure white to yellowish 

 rusty, below ; above, the tone differs considerably in different individuals. 



Nyctomys decolorus (Trde). 



Eleven specimens, three of which are young ; Yaruca, 1,000 feet. The type 

 locality of this species is Rio de las Piedras, northern Honduras. In cranial 

 characters the present series agrees very well with the type. In color, a com- 

 parison can hardly be made, the type being in poor condition. The present 

 form is quite distinct from N. nitellinus, lately described by me ^ from Chiriqui, 

 though possibly the two intergrade and are only subspecies. Comparing the 

 Chiriqui series with the present one, the following differences are evident : the 

 skull of N. decolorus is lighter and relatively wider posteriorly than that of 

 N. nitellinus ; N. decolorus has narrower and lighter nasals that end behind in 

 a rounding point (the nasals of iV. nitellinus are square posteriorly). In color 

 the two forms are nearer than I had supposed by an examination of the type 

 alone ; they differ chiefly in A'', nitellinus having a much more conspicuous and 

 larger black whisker patch and broader black orbital ring. 



Sigmodon hispidus borucae (Allen). 



Twenty-two specimens, all from Yaruca, 1,000 feet. 



In important characters these specimens do not differ from more southern 

 examples of B. hispidus borucae, from Costa Rica and Chiriqui, but in color they 

 average a little paler; individuals can be selected, however, from the two series 

 that correspond exactly. 



Sigmodon hispidus furvus, subsp. nov. 



Type (and only specimen) from Ceiba; Honduras, sea level, adult ^, No. 

 10,(i'65, Coll. Mus. Comp. Zodl., collected Jan. 16, 1902, by W. W. Brown, Jr. 



Characters. — Nearest to Sigmodon hispidus saturatus Bailey of Teapa, Ta- 

 basco, Mexico, but darker in color ; less rusty above ; tail blacker, and under 



1 Bull. M. C. Z., 1902, Vol. XXXIX., p. 30. 



