neio Afiicdfi Mimmuls-. 171) 



IleUophohius rubustus, sp. n. 



Larger tliaii //. argenteo-cinereus, wit!i a brou 1 hit norbital 

 ro;^ion. 



JOxtenial appearance quite a3 in Pcters's species. Hairs of 

 back about 12 mm. in k'n<,'tli. Ends of liair.s drab, darker 

 than Kidgway^s " ecru-(h-ab." 



Skull markedly larger than anj other in the collection, 

 either from Nyasaland (//. argenteo-cinereus) or East Atrica 

 (//. alhifrons, Kinini, <tc,). Nasals, instead of being evenly 

 convex on each side and therefore broadest at their centre, 

 contiiniing to increase in breadth to the tip of the prc- 

 m axillary processes, so that they are broadest close to their 

 hinder end, their sides being nearly evenly divergent through- 

 out ; posteriorly they slightly surpass the fairly broad ends 

 of the preniaxillary processes. Interorbital region very 

 broad, the orbital edges distinctly concave, succeeded behind 

 by well-marked posforbital ])rocesses. Intertemporal region 

 concave laterally. Bulla3 large, their diagonal diameter, on a 

 line from the paroccipital process to the glenoid fossa, 10"5 

 instead of ^'5 mm. 



Dimensions of skull (those of the dried skin not being 

 worth recording) : — 



Basal length \'l mm.; length from condyle to tip of in- 

 cisors 50 ; zygomatic breadth 34 ; nasals li x 5'5 ; interorbital 

 breadth ll'D; tip to tip of postorbital processes 13"6 ; inter- 

 temporal breadth 10 ; mastoid breadth 22 ; palatal length 29*5 ; 

 diastema 15'G; length of molar series (alveoli) ii. 



JJah. Mpika, N.E. Rhodesia. Alt. oOOO feet. 



Type. Adult skin, prubably male. B.M. no. 5. 11. 10. 2. 

 Collected and presented by 1^'. II. Melhuid, Esq. 



This mole-rat, having been obtained by Mr. Melland on 

 the western side of the escarpment which separates the basin 

 of Bangweolo from the valley of the Loangwa, is the first of 

 the genus received by the Museum from the Congo drainage 

 area. 



Noack's Ileliophohius inaruvgonsis * has a skull of about 

 the same dimensions as that of II. argenteo-cinereus. 



• Zool. Jahrb. Syst. ii. p. 2_'3, pi. ix. fig. 25 (1837). 



