1907.] Catalogue of the Coleoptcra of South Africa. 537 



beginning at the same distance from the base as the apex of the 

 scutellum and reaching the apical part, ending there in a conical 

 tubercle, on the outside of which is another tubercle, there is also 

 a conspicuous depression at the base on the inner side of the humeral 

 callus, the dorsal part and the base are covered with cicatricose 

 ovate punctures which are rounder on the sides and partly hidden 

 by the luteous coating ; pygidium with squamigerous, ovate, cica- 

 tricose punctures ; truncate at apex, plainly carinate in the centre, 

 and having in the male a moderately distinct elongated tubercle on 

 each side of the truncate apical part ; in the female this tubercle 

 is elongated, keel-like, triangularly tuberculated at apex, and the 

 surface is more densely squamose ; abdomen squamose ; legs deeply 

 cicatricose punctate, each puncture bearing a squamose hair. 



Length 10-11 mm ; width 5 mm. 



Hab. Southern Ehodesia (Salisbury, Sebakwe, Enkeldoorn). 



Mr. G. A. K. Marshall informs me that, like Trogodcs rotuncUcollis , 

 this species feeds on low plants which have been attacked by 

 Coccidce or Aphides. 



Gen. MYEMECOCHILUS, Wasm., 

 Illustr. Zeitschr. f. Entom., v., 1900, p. 83. 



Mentum strongly gibbose, apical part of the ligula scooped into a 

 very broad, deep, slightly slanting depression, last joint of labial 

 palpi reaching the inner edge of the excavation ; outer maxillary lobe 

 thick, dentate as is also the apex of the inner lobe ; head carinate 

 longitudinally in the centre ; clypeus long, parallel, very deeply and 

 triangularly incised in the centre in front and with the outer angles 

 acuminate ; eyes very large ; prothorax sub-angularly ampliate 

 rounded laterally before the median part, nearly straight thence, the 

 base quite straight and the basal angles sharp ; scutellum sharply 

 triangular, as broad at the base as long ; elytra only slightly broader 

 at the base than the prothorax at its widest part, nearly parallel, 

 highly uni-costate in the dorsal part, the costa projecting above the 

 vertically declivous part ; propygidium with the spiracles sharply 

 acuminate ; pygidium carinate longitudinally in the middle, at the 

 base, and with the central part produced into a rounded horizontal 

 tubercle projecting considerably beyond the apical margin ; meso- 

 sternal process not projecting beyond the coxae ; anterior tibiae 

 dentate at apex only, posterior and intermediate ones without any 

 spine on the upper part ; tarsi short, almost transverse, compressed 

 laterally. 



