218 ME. M. JACOBT (XN PHYTOPHAGOUS COLEOFTEKA [Mar. 6, 



flavous, the others black ; thorax rather strongly widened at the 

 middle, extremely minutely and rather sparingly punctured, only 

 visible under a strong lens, the sides feebly rounded, the posterior 

 margin with some strongly marked teeth near the angles and 

 preceded by a deep subquadrate fovea — the disc either black, with 

 the anterior margin narrowly, the sides more broadly and angularly 

 flavous, and a similar coloured spot at the middle of the base 

 (mas.) ; or flavous, with a broad anteriorly divided band, not 

 extending to the margins, on each side, and the margius themselves 

 narrowly, black (fern.) ; scutellum black ; elytra very slightly 

 narrowed posteriorly, regularly and strongly punctate-9triate, 

 flavous, rather opaque in the male, more shining in the other sex, 

 the shoulders with an elongate black spot, a smaller one of rounded 

 shape is placed near the scutellum, and two subquadrate spots, 

 which are joined together anteriorly, below the middle, the sutural 

 and apical margins are likewise narrowly black ; the underside and 

 the femora black ; tibiae robust and widened anteriorly, fulvous, the 

 outer margin of the anterior tibiae and the base of the four posterior 

 black, tarsi fulvous ; presternum prolonged laterally at the base 

 into points, flavous, the apex of the mesosternum and a spot 

 between the posterior coxae likewise flavous. 



Hnb. Salisbury, Mashonaland, on mimosa (G. Marshall). 



The markings of the elytra resemble somewhat those of C. erythro- 

 melas Suffr. and some other African species, but the shape of the 

 posterior angular band is quite different; nor do I know of a 

 similar structure in regard to the thorax, in which the lateral basal 

 teeth are preceded by a distinct notch or fovea ; the shape of the 

 presternum with its prolonged posterior angles is another peculiarity 

 of this species, of which I have three specimens before me. 



Cosstobius plagiatus, sp. n. 



Black, the antennas and the legs flavous ; thorax im punctate, 

 black, the anterior and lateral margins and two basal spots flavous ; 

 elytra very finely punctate-striate, black, a broad transverse band 

 before the middle and another at the apex flavous. 



Length 1| millim. 



Of narrow, cylindrical shape ; the head black, impunctate, the 

 eyes widely separated, not strongly emarginate, parts of the mouth 

 and the antennae flavous, the latter short, with the sixth and the 

 following two joints strongly dilated (the rest wanting); thorax 

 twice as broad as long, the sides feebly rounded, narrowed towards 

 the apex, the surface impunctate, black, very shining, the anterior 

 margin very narrowly and the lateral ones more broadly flavous, 

 the base with tvyo other bright flavous transverse spots, only 

 separated by a thin stripe of the ground-colour ; scutellum broad, 

 pointed at the apex, black ; elytra not wider at the base than the 

 thorax, scarcely perceptibly punctate-striate, the striae widely 

 separated, the black portion divided by a broad transverse bright 

 flavous band, which surrounds the shoulders at the outer margin 

 and does not quite extend to the suture, this band is placed before 



