280 Anna la of the South African Museum. 



roughly transversely scabrose ; the third joint of the antennae is 

 much longer than the fourth. 



This species is probably closely allied to 1). scabripennis, Gerst., 

 recorded from the island of Zanzibar and from Bagamoyo, but the 

 third and fourth antennal joints are not sub-equal in length. 



Length 17^-21 mm. : width 6^-8 mm. 



Hab. Southern Ehodesia (Sebakwe), D. Dods. Nyasaland. 



DORELOGENA, n. gen. 



Mentum and buccal organs of Praoyena, the rnentum, however, is 

 carinate in the centre of the outer face but not grooved ; the shape 

 of the head is nearly alike, the antennal crests being also very long: 

 the eyes are more transverse ; the five basal joints of the antenna? 

 are almost glabrous, the others briefly pubescent, and, with the 

 exception of the ultimate one, shorter, more massive, not projecting 

 inwardly more than outwardly at apex, the last joint is slightly 

 shorter than the two preceding taken together ; prothorax marginate 

 all round, wider than long, plane, bi-sinuate along the base ; 

 scutellum short, triangular ; elytra sub-parallel, slightly convex in 

 the posterior part, punctate-striate ; prosternum with a sharply 

 mucronate vertical process close to the basal margin ; legs and 

 abdomen as in Praogena. 



The distinctive generic characters are the shorter and more robust 

 antennal joints, the third of which is longer than the fourth, and the 

 prosternal process. The facies and colouring differ much from 

 those of Praogena. 



DORELOGENA CASTANEA, n. sp. 



Chestnut-brown, shining, not metallic ; head closely punctulate, 

 supra-antennal crests longitudinal, very long ; the five basal antennal 

 joints are almost glabrous ; the others covered with a very short, 

 dense pubescence ; prothorax roundly ampliated near the median 

 part, slightly diagonal from the median part to the outer basal angle 

 which is sharp, but not projecting, carinate all round, grooved along 

 the basal margin from a certain distance from the outer angle, 

 hardly convex, one-fourth broader than long, very closely punctu- 

 late with the intervals smooth and plane ; scutellum short, not 

 distinctly punctate ; elytra sub-parallel, only very slightly sinuate 

 laterally, plane, slightly convex in the posterior declivity, narrowly 

 striate, the strias with small punctures, intervals somewhat convex 

 but not tectiform and very closely punctulate ; abdomen strigillate- 



