314 On a new Heliophobius. 
XXXVI.—A new Heliophobius from North-eastern 
Rhodesia. By Oupristp Tuomas. 
(Published by permission of the Trustees of the British Museum.) 
A RE-EXAMINATION of the mole-rats obtained in the 
Loangwa Valley and Angoni-land by Mr. 8. A. Neave, 
and referred to Heliophobius argenteo-cinereus by Mr. 
Wroughton, convinces me that the species should be dis- 
tinguished from the Nyasa form. It may be called 
Heliophobius angonicus, sp. n. 
Colour and length of fur about as in the Nyasa species. 
A small white frontal spot present in two specimens out of 
four. 
Skull distinguished from that of argenteo-cinereus by its 
much greater frontal breadth, and the greater development 
of the postorbital processes, the orbital concavity in front 
of them being consequently much more marked. Upper 
profile about as in argenteo-cinereus, though the occipital 
plane is more slanted forwards; a distinct vertical ridge 
developed in the middle line in all three adult specimens— 
not present in any of our considerable series of the allied 
species. Structure of posterior palate as in argenteo- 
cinereus, not as in spalaz. 
Dimensions of the type :— 
Head and body 154 mm.; tail 16; hind foot 30. 
Skull: cendylo-basal length 40°5 ; condyles to tip of 
incisors 44°2; zygomatic breadth 32; nasals, length 13, 
breadth anteriorly 3°3, at posterior third 5:2; interorbital 
breadth 9°4; tip to tip of postorbital processes 12°4; inter- 
temporal breadth 9:4; least breadth above meatus 18; 
mastoid breadth 21:3; palatilar length 23; upper tooth- 
series (alveoli) 8°2. 
Hab. East Loangwa Valley and Angoni-land. Type from 
the Bua River, Central Augoni-land. Alt. 8500 ft. Other 
specimens from Petauke 2400 ft., the Mala Country 2600 ft. 
(Neave), and West Nyasa at 12° 8., 84° KE. (Lloyd). 
Type. Adult male. B.M. no. 10.9.21.10. Original 
number 211. .Collected 31 May, 1910, by S. A. Neave. 
Presented by the Entomological Research Committee. 
