new Mammals from South America. 271 



Skull essentially similar to that of Ph. Darwini, but 

 differing by its much smaller size. 



Dimensions of the type (in skin) : — 



Head and body 97 millim.j tail 86; hind foot (wet) 23; 

 ear (wet) 18. 



Skull: back of frontals to tip of nasals 18; greatest 

 breadth 13'5 ; nasals 1 1*3 X 3*5; interorbital breadth 46 ; 

 palatal length from henseliou 12*2; diastema 7 ; upper molar 

 series 4*4; extreme length of lower jaw 16*5. 



Bab. Mount Pichincha, Ecuador, altitude 3400-4000 

 metres. 



Type B.M. no. 98. 5. 1. 11. Collected October 1897, 

 and presented to the British Museum by Consul L. Soder- 

 strom. 



This species, for whose discovery we have again to thank 

 Mr. L. Soderstrom, of Quito, is evidently the Ecuadorean 

 representative of the Chilian Ph. Darwini, but may be readily 

 distinguished by its smaller size and much smaller ears. At 

 the request of Mr. Soderstrom I have named it in honour of 

 Mr. W. H. D. Haggard, Her Majesty's Minister at Caracas, 

 to whose kindness he has been at various times indebted. 



Akodon lenguarum, sp. n. 



Closely allied to A. obscurus, Waterh., but lighter in 

 general colour, less heavily lined on the back, and without 

 the dark yellowish suffusion of the upper and under surfaces. 

 Asa consequence the colour is a comparatively clear grey 

 above, though more yellowish on the rump, and lighter on 

 the sides, while the belly is whitish, the tips of the hairs 

 being white, with scarcely a tinge of yellowish. Hands and 

 feet uniformly pale grey above. Tail blackish above, whiter 

 below. 



Size and proportions about as in A. obscurus. 



Skull, as compared to a number of skulls (both older and 

 younger) of A. obscurus, rather more heavily ridged in the 

 supraorbital region, the interparietal rather smaller, the top 

 of the anteorbital projection more slanted downwards, and 

 both the palatal foramina and posterior nares narrower. 



Dimensions of the type (measured in the flesh by 

 Mr. Kerr) :— 



Head and body 115 millim. ; tail 76 ; hind foot 21 ; ear 14. 



Skull: greatest length 28*5; basilar length 24*3; greatest 

 breadth 16; nasals 9*7 x 3'3; interorbital breadth 4*9 ; inter- 

 parietal 2x8'8; palate length from henselion 12"8; diastema 

 8*4 ; palatal foramina 62 x 2 ; length of upper molar series 

 (c.) 4-7. 



