212 DescrijJtive Catalogue [1896. 



at the apex than at the base, finely striate with the intervals plane, 

 light testaceous, with a broad infuscate sutural band reaching from 

 base to apex and extending on each side from the suture to the fifth 

 interval, and also on the sixth interval from about the median part to 

 the apex, third stria with a deep puncture at about the median part of 

 the disk; abdomen with the apical parts of the segments infuscate. 

 In the female the mandibles are short, the labrum is long, but not 

 incised, the head has a very deep and broad median impression, the 

 prothorax is not so broad in the anterior part, the basal part is also 

 broader, and the elytra have irregular infuscate patches. Length 

 8 -10 mm. ; width 2^-3 mm. 



Hab. Cape Colony (Oudtshoorn). 



Gen. HYSTEICHOPUS, Bohem., 



Insect. Caflr., i., p. 42. 



Ctenoncus, Chaud. 



Mentum broadly notched, with the lateral lobes generally acute 

 and having a broad median tooth about one-third the length of the 

 lateral lobes, either more or less rounded at the top or slightly bifid ; 

 ligula horny, long, narrow, convex, bi-setose at the tip; the paraglossae 

 membranaceous, setulose at the apex, a little longer than the ligula 

 and subacuminate at the tip, or a little shorter than the ligula, which 

 is itself not so much elongated ; labrum subquadrate, slightly 

 sinuate ; last joint of the labial and maxillary palpi, subfusiform and 

 rounded at the tip or subtruncate ; prothorax generally elongated 

 or subcordiform ; elytra plane, more parallel in the male than in 

 the female ; tarsi very bristly underneath, those of the male with two 

 series of laminif orm scales ; claws pectinate ; anal segment of the 

 male with one seta on each side, that of the female with two. 



These insects are found under stones or heaps of rubbish or 

 manure. Dr. F. Purcell informs me that H. sulcatus burrows in 

 sand. They are very quick in their movements. The facies is not 

 the same for all species ; some are winged, others are not ; yet their 

 i-elationship is indubitable. Onei species only is recorded from 

 Abyssinia. 



The shape of the paraglossae, of the last joint of the palpi, and 

 also of the median tooth in the mentum varies slightly, and the 

 species may perhaps, for the sake of easier identification, be 

 arranged as follows : — 



Synopsis of Genera. 



Ligula very long ; paraglossae longer than the 

 ligula ; last joint of palpi obtusely rounded at the tip ; 

 median tooth of the mentum long, rounded at the 

 tip ; wings under the elytra Sub-genus Hystriclwpus. 



