191 Mr. 0. Tliomas on new Uallitlnix, Miil.is, tCr. 



IVinir'iisions of the type (measured in tlie flcsli) : — 



Head and body 112 mm.; tail 151 ; hind foot (s. u.) 2); 

 ear IT). 



Sknll : greatest lenjrth 82 ; basal lenjjtli 24-5 ; zygo- 

 matic breadth 17; nasals, length lO'T ; interorbital breadth 

 o-fi ; brain-case, breadth 15; palate length 124 ; diastema 8"2 ; 

 palatal foramina fi'.Sx 2-4 ; length of upper molar series 4-7. 



Jlah, Kio Verde, N.W. Ecuador. Alt. 1000 m. 



Ti/pt\ Adult male. B.M. no. 1. 1. 6. 4. Collected 

 6tli December, 1899. 



This l}Iiipidomi/.<t appears to be the Ecuadorcan represen- 

 tative of B. venezuclcBy but it is smaller than either that 

 species or li. latimanuft, Tomes. It may also be related to 

 my Ji. microtis of Bogota, but has larger cars. 



Rhipidomys paricola, sp. n. 



A vcrv small species of the R. dryas group. 



Size almost or quite the smallest of the genus. Fur 

 rather sparse, hairs of back about 6 mm. long. General 

 colour dark rufous grey, much duller than in R. dryas; sides 

 but little clearer rufous. Under surface dull creamy white, 

 not sharply defined laterally ; the hairs slaty basally, except 

 on the throat and the centre of the chest. Outer aspect of 

 limbs like body, inner whitish, the hind limbs not so wliite as 

 the anterior ones. Hands and feet dull buffy, the halkical 

 edges of the metatarsals lighter. Ears of medium size, the 

 anterior part of their backs blackish, contrasting with the 

 general colour. Tail slender, uniformly blackish, not well 

 haired for this genus, the scales scarcel}' hidden, and the tip 

 with but a slight pencil, of which the hairs are only about 

 2^ mn). long. 



Skull very similar to that of R. dryas. 



Dimensions of the type (measured in the flesh) : — 



Head and body lOO'mm.; tail 100; hind foot (s. u.) 22; 

 ear 17. 



Skull : greatest lengtli 25 ; basilar length 19*3 ; inter- 

 orbital breadth 47; })alatine foramina 4x2*1; length of 

 upper molar series 4'2. 



J lab. ]garape-Assu, near Parji. Alt. 50 m. 



Type. Female. B.M. no. 4. 7. 4. 63. Original number 

 1872. Collected 29th April, 1904, by Alphonse Robert. 



'J his species is evidently most closely allied to the Ecua- 

 dorcan R. dryns, liut may be readily distinguished by its 

 much duller coloration. The recently described R. rosilla is 

 also a member of the same group. 



