1904.] OP THE GENUS HIPPORRHINUS. 129 



incertus may be distinguished by the sparser and more elevated 

 granules on the prothorax, the ahnost entire absence of granules 

 on intervals 2, 4, and 6 of the elytra, and the much larger and 

 more distant granules on the remaining intervals. 



126. H. ARENARius Falir. 



H. arenarius Fahr. Of v. K. Vet.-Akad. Forh. p. 210 (1871). 



Long. 12, lat. 5^-6 mm. 



Head convex on vei'tex, forehead flattened and usually with a 

 shallow central fovea, punctuation close and deep b\it hidden 

 beneath the dense brown scaling ; anteocular furrows obsolete. 

 Rostrum not incised at base, about as long as prothorax only, 

 very little curved. Upper surface with three narrow and 

 slightly undulating carinas converging towards base, which is 

 higher than the j)lane of forehead, punctuation coarse but 

 hidden by the scaling ; lateral sulci distinct, the upper pair 

 broader and meeting at base ; scrobes lateral but not very 

 oblique ; inferior basal furrow very deep. Antennce piceous, 

 setose; scape curved, exceeding the anterior, but not the pos- 

 terior, margin of eye ; the two basal joints of funicle subeqvial. 

 Prothorax in S slightly broader than long, the length a little 

 greater than the width at base ; in 5 more transverse, the 

 length less than the width at base ; apex narrower than base, 

 sides moderately rounded, broadest about middle, dorsal anterior 

 margin trvmcate ; ocular lobes feebly developed. Upper surface 

 convex, closely set with small rounded granules, leaving a narrow 

 central furrow without a carina ; granules bare, interstices with 

 thick bi-own scaling. Elytra ovate in S , broader and more 

 convex in $ , shoulders sloping, sides moderately rounded, 

 broadest about middle, apical processes very short in $ , absent 

 in S . Upper surface convex, sulcate, the sulci containing rows 

 of large shallow punctures with minute intervening granules ; 

 intervals all equally i-aised, each having a single row of granules 

 bearing short depressed pale sette ; scaling dense, dark brown, 

 partly concealing the sculptinlng of the sulci. Legs with dense 

 scaling except on basal half of femora which is finely setose ; 

 the legs are markedly thicker in the d and the tibise are more 

 curved, the hind pair having a strong tooth before middle on the 

 interior edge ; posterior tarsi with the 2nd joint slightly narrower 

 than the others, 2nd and 3rd subeqiial in length, the 1st longer. 



Matabeleland : Bulawayo {J. P. Cregoe & F. Eyles). 



Type (a $ ) in the Stockholm Museum. 



The peculiar structure of the hind tibise will enable the S of 

 this species to be easily recognised ; the § has only a slight 

 indication of the tibial tooth. In size and general shape the 

 species has much the appearance of corniculatus Fahr. 



127. H. SERIEGRANOSUS Gyl. 



R. seriegranosits Gyl. Schh. Gen. Cure. v. p. 772 (1840). 

 Long. 11, lat. 4 mm. 

 Proc. Zool. Soc— 1904. Yol. I. No. IX. 9 



