148 Mr. O. Thomas on 
clearly the coast species. S. quebradensis, Allen*, from 
Cumané4, has also many differences in colour, and possesses 
only three pairs of mamme +. 
18. Rhipidomys nitela, sp. n. 
a-f. Six ad. and imm. skins. 
Very similar to &. venezuele, but markedly smaller. 
General external appearance quite as in &. venezuele, with 
which it shares the general greyish fawn-colour, sharply 
defined pure white belly, brown ears, light feet with brown 
middle line of metapodials, and long, hairy, uniformly brown 
tail. Fur of these specimens rather shorter (hairs of back 
about 5 millim. in length), but this may possibly be seasonal. 
Skull: similar in shape to that of 2. venezuele, but much 
smaller throughout, narrower and rather more delicately 
built. Supraorbital edges square, not heavily ridged. Palatal 
foramina large, widely open, extending to the level of the 
first lamina of m’. 
* Scrurus (Guerlinguetus) estwans quebradensis, Allen, Bull. Am. Mus. 
N. H. xii. p. 217 (1899). 
+ The following squirrel, also presented by Mr. McConnell, may be 
here described :— 
Scwurus Macconnelli, sp. 0. 
A brownish olivaceous species, near S. quebradensis, but with eight 
mamme. Fur longer and shaggier than in S, Quelchiz, the hairs on the 
back about 11 millim. in length. General colour above grizzled brown, 
perhaps nearest to Ridgway’s ‘‘vandyke brown,” with an olivaceous 
tinge. Under surface rich fulvous or orange buffy, richest on the chest; 
chin and throat greyish ; bases of hairs slaty grey; lines of demarcation 
on sides not defined. Head like body; ears rather short, their colour 
quite like that of the head; a prominent buffy postauricular patch present. 
Outer sides of limbs like body, the digits greyer; inner sides washed 
with fulvous, like that of the belly, but duller and paler. Tail imperfect 
in the single specimen, but evidently of the same type of coloration as 
in S, Quelchii. Mammee 8. 
Nasals comparatively long, parallel-sided, their outer corners level with 
the premaxillary processes behind, the middle of their hinder edge pro- 
jecting angularly forwards. 
Dimensions of the type (measured in skin) :— 
Head and body (c.) 190 millim.; hind foot, s. u. 44, c. u. 48; ear (dry) 17; 
nasals 14°5 (diagonally) x6°4; front of lower premolar to tip of incisors 
13:5. 
Hab. Mt. Roraima, near its base. 
Type. B.M. no, 1.1. 28.1. Collected October 1, 1898, and presented by 
F, V. McConnell, Esq. 
This species has somewhat the appearance of 8. quebradensis, but 
may readily be distinguished by its possession of eight mamme, as in 
S. Quelcehit, from which it differs by its shaggier fur, browner colour above 
and more fulvous below; it is also distinguished from all its neighbours 
by its marked postauricular patches. 
