1904.] OP THE GEXUS HIPPORRHIXUS. 31 



Upper surface with a deep and continuous central furrow, and a 

 broad coarsely- punctured carina on each side of it ; lateral sulci 

 deep, not meeting at base, subequal in length and breadth, the 

 intervening carina narrow and impunctate ; scrobes lateral, deep, 

 straight and parallel to the sulci ; inferior basal furrow present, 

 but comparatively shallow. Antennce with sparse white setse ; 

 scape just reaching eye; the first joint of funicle longer than 

 second in $ , about equal to it in c? . Prothorax a little broader 

 than long, apex much narrower than base, sides not much 

 rounded, broadest about middle, dorsal anterior margin slightly 

 convex, ocular lobes strongly developed. Upper surface convex, 

 closely set with low rounded tubercles, leaving a very narrow 

 (sometimes scarcely distinguishable) central furrow containing no 

 carina ; tubercles bare, shiny, each with a short subdepressed dark 

 seta, the interstices fairly closely covered with large round white 

 scales. Elytra broad, oblongo-ovate, shoulders sloping, sides but 

 little rounded, broadest about middle, apical processes very shoi-t 

 and tuberculiform in both sexes. Upper surface convex, with 

 very shallow sulci containing rows of distinct granules ; intervals 

 1, 2, 4, and 6 each with a regular and complete row of granules 

 scarcely bigger than those in the sulci ; 3, 5, and 7 each with a 

 complete row of large conical tubercles, which become smaller and 

 less conical towards the base on the disk ; tubercles bare, each with 

 a short subdepressed dark seta, the interspaces with scattered 

 large round white scales. Legs thick, with large scattered 

 punctures and sparse white scaling ; all the tibise sti-ongly serrate 

 internally ; posterior tarsi short, the three joints subequal in 

 length and breadth. 



Namaqualand : O'okiep {L. Peringiiey). 



Type in the South African Museum. 



Nearly allied to R. verrucellus Gyl. and H. ohesus Gyl., but 

 readily distinguished by the three rows of large conical tubercles 

 on each elytron. 



12. H. VERRUCELLUS Gyl. 



H. verrucellus Gyl. Schh. Gen. Cure. v. p. 784 (1840). 



Long. 16, lat. 7^ mm. 



Head convex, with scattered large coarse punctures and sparse 

 white scaling, forehead rugosely wi-inkled ; eyes rather promi- 

 nent ; anteocular furrows faint. Rostrzim with a deep dorsal 

 incision at base, shorter than pi'othorax, slightly curved and the 

 sides subparallel throughout, the genee being very little dilated. 

 Upper surface very rugosely punctured and with a deep and con- 

 tinuous central furrow containing no carina ; lateral sulci deep, 

 filled with white scaling, and separated by a narrow wavy carina, 

 the upper part slightly shorter and almost uniting at base ; 

 scrobes lateral, almost parallel to the sulci ; inferior basal furrow 

 deep. Anteymce with scape just reaching eye; the two basal 

 joints of funicle subequal. Prothorax about as long as broad, 

 apex much narrower than base, sides very slightly dilated to 



