1898.] PHYTOPHAGOUS COLBOPTBRA OF AFRICA. 225 



side and the pygidium black, clothed with whitish pubescence ; legs 

 either almost entirely black or the tibiae and tarsi more or less 

 flavous, sometimes entirely so ; prosternum A'ery narrow, with a 

 central longitudinal groove. 



Hab. Bstcourt, Natal (G. Marshall). 



Of this genus, four species have up till now been described by 

 Gerstaecker and Suffrian. The present insect seems very closely 

 allied to A, pktus Suffr., but is smaller, the thorax of totally 

 different shape (Suffrian gives the size of the thorax in A. pictus 

 as one half longer than broad, which is evidently meant to be the 

 opposite), the elytra with only a short transverse sutural spot 

 below the middle, not with a strongly dentate band as in A. pictus. 

 I have seen four specimens, which were obtained by Mr. Marshall. 



ACOIASTXJS TUBERCULATUS, Sp. UOV. 



Below piceous, clothed with white pubescence, above dark 

 fulvous with yellow tubercles, sparingly pubescent, apical joints of 

 antennae black ; thorax and elytra closely punctured, rugose, and 

 with tubercles, apex of elytra with a transverse smooth raised 

 space. 



Length 3 millim. 



Head closely rugose and clothed with white pubescence, fulvous, 

 or more or less black ; the eyes very large and closely approached 

 in the male, but slightly emarginate ; antennae slender, extending 

 to the middle of the elytra, black, the lower four joints flavous ; 

 thorax about one-half broader than long, narrowed in front, the 

 whole surface closely covered with rugosities and deep punctures, 

 partly of flavous colour, the rest fulvous and clothed with very 

 short white pubescence ; scutellum broad, pointed at the apex, 

 black, finely pubescent ; elytra wider at the base than the thorax 

 and sculptured exactly like the latter, Ukewise clothed with short 

 white pubescence, the apex with a transverse, smooth, raised space, 

 the shoulders in one specimen with a black spot ; underside 

 obscure fulvous or piceous, densely clothed with silvery hairs ; legs 

 fulvous, the anterior femora strongly thickened, their tibiae slightly 

 curved ; prosternum very narrow and elongate, convex, pubescent. 



Hah. Salisbury, Mashonaland, obtained by beating (&'. Marshall). 



Much narrower than the preceding species and resembling 

 entirely a species of Packyhrachys in general appearance ; the 

 prosternum is, however, of different shape, but has not the central 

 groove of the other species. A. malvm Suffr. seems closely allied, 

 but differs in having dark bands on the thorax and the elytra, and 

 scarcely a raised smooth space at the apex of the latter, nor does 

 Suffrian mention any pubescence of the elytra. 



Cryptocephalus unicinctus Jac. P. Z. S. 1897, p. 259, = C. africanus 

 Jac. Trans. Ent. Soc. Lond. 1895, p. 168. 



Cry2)tocephalus himacMlicollis Jac. P. Z. S. 1897, p. 259,= 

 C. angustofasciatus Jac. Trans. Ent. Soc. Lond. 1895, p. 169. 



I have noticed, unfortunately too late, that these two species 

 Pboc. Zool. Soc— 1898, No. XV. 15 



