324 Mr. W. L. Distaiu's Rhjnclwlal Notes. 



the anterior lateral processes robust, hroaci, directed out- 

 ■\vardly and a little upwardly, their apices subtruncate ; 

 ])Osterior pronotal process tricarinate, impinging on tegraina 

 immediately beyond scutelium, gradually narrowing to apex, 

 which is subacute, and passing posterior angle of inner 

 tegminal margin. 



Jjong, 8i mm.; exp. lat. pronot. ])rocess. 5 mm. 



Hub. Borneo; Alt. Matang {R. She/furd). 



Centrotus albilatus. 



Centrotus aViilatns, Walk. Journ. Linu. Soc. Loud., Zool. x. p. 184 

 (1868). 



Hah. New Guinea. 



Genus Tsiiaka. 



Tshaka, Dist. Insect. Transvaal, pt. i.\. p. 214 (1908). 



Tshaka undulatus, sp. n. 



Head, pronotum, scutelium, and body beneath black ; 

 legs more or less castaneous, the tarsi ochraceous ; tegmina 

 flavescent, the veins darker, especially ou the apical are;), 

 base and a small costal spot beyond middle black, a small 

 castaneous spot at posterior angle of the inner tegminal 

 margin ; pronotum strongly, centrally, longitudinally cari- 

 iiate, the posterior process tricarinate, undulate, impinging 

 on tegmina before the posterior angle of the inner tegminal 

 margin, and then recurved and running almo>t parallel with 

 it to beyond the posterior angle, the apex subacute ; lateral 

 pronotal processes robust, their apices slightly recurved and 

 subacute ; scutelium about as broad as long, its ape.\ 

 bispinous. 



Long. 5 mm.; exp. pronot. process. 4 mm. 



Hub. Mashoualand ; Salisbury (G. A. K. Marshall). 



Allied to T. natiiralis, Dist,, from the Ttausvaal, but with 

 the posterior pronotal process shorter, more robust, more 

 convexly arched over the scutelium, and the apical area more 

 recurved; tegmina shorter and proportionally broader. 



Plafybelus escaleranus, sp. n. 



Head, pronotum, scutelium, body beneath, and legs 

 blackish brown; a pule spot at each basal angle of the 

 scutelium ; tegraina subhyaliue, apical margin ochraceous, 



