Col eoptera from East Africa. 45 



Dityloderus, gen. nov. 



Female. — Head rather broadly concave between the 

 antennary tubercles. Epistome distinct. Last joint of palpi 

 narrowed towards the apex. Eyes rather small, emarginate, 

 with the lower lobes somewhat oblique. Prothorax bi- 

 spinose on each side, binodose on disk. Elytra subovate, 

 fused together, each with a short basal crest, a stronger mid- 

 dorsal crest, and a subserrate lateral carina, which reaches 

 from the shoulder almost to the beginning of the posterior 

 third of the elytron ; apices obliquely truncate and enclosing 

 an angle. Legs of moderate length ; posterior femora scarcely 

 reaching to the tip of the abdomen ; middle tibia? with an 

 oblique groove below the middle of their length ; claws of 

 tarsi divergent. Prosternal process simply arched, gradually 

 expanded behind, with its posterior margin slightly bowed 

 in. Metasternum very short. Intercoxal process of abdo- 

 men triangular in form. Antenna? scarcely reaching beyond 

 the middle of the elytra ; scape without cicatrix, reaching as 

 far as the anterior lateral spine of prothorax; third joint 

 about equal in length to the scape, the rest gradually short- 

 ening; anterior face of the fourth joint near its apex and of 

 each of the succeeding joints along its whole length pre- 

 senting poriferous depressions. 



The species for which this genus is constituted has some 

 resemblance to species of Phrissoma, but it is excluded from 

 the group Phrissomides owing to the absence of a cicatrix 

 from the scape of the antenna?, and according to Lacordaire's 

 system of arrangement must be placed in the group 

 Parmenides. 



Dityloderus fulicjinosus, sp. n. 



Niger, indumento fuliginoso obtectus ; prothorace utrinque bi- 

 spinoso, supra nodis duobus magnis iustructo; elytris utrisque 

 cristis duabus — una basali, secunda pone medium — et cariua late- 

 rali subserrata a huraero ad partem tertiam posteriorem extensa 

 instructis. 



Long. 1^, lat. ad humerum b' mm. 



Hub. N'Giriama, Brit. E. Africa {Dr. J. IV. Gregory). 



Black, cuvered with a dark brown indumentum. Pro- 

 thorax armed on each side with two spines arising from a 

 common elongated base, the larger spine at about the middle 

 of the length of the prothorax, the smaller between the 

 middle and the anterior margin ; disk furnished with two 

 large obtuse knobs, somewhat oblong-ovate in outline, and 



