1900.] Catalogue of the Colcoptcra of South Africa. 531 



the sculpture is the same ; the inner claw of the anterior tarsi of the 

 male is not much developed, but is bifid at tip. 



Length 14 mm. ; width 8 mm. 



Ilah. Natal (Newcastle), Transvaal (Potchefstroom). 



HYBOSCHEMA, n. gen. 



Mentum gi'adually narrowed from the base to three-fourths of the 

 length, and broadly dilated from there to the apex where it is deeply 

 and broadly emarginate ; last joint of labial palpi much longer than 

 the two preceding put together, maxilUe with three strong, hamate 

 teeth on each side, at tip, the two upper ones being connate at base; 

 last joint of maxillary palpi long, fusiform, but more swollen in- 

 wardly than outwardly, and distinctly truncate at tip ; head without 

 clypeal or frontal ridge, clypeus very attenuate obliquely, apical 

 part straight and with the margin recurved but not dentate ; 

 prothorax a little attenuate laterally in front, base with an impressed 

 line along the margin ; scutellum sharply ogival ; elytra short, a 

 little broader than the prothorax at base, a little amphate laterally 

 towards the middle and covering the basal part of the pygidium 

 which is only slightly convex in the lower part, the striation on the 

 elytra is of the same sort as in the two preceding genera, but not 

 cicatricose ; the last abdominal segment- is very little constricted 

 laterally ; the metasternum and the prosternum are similar ; the 

 anterior tibias are tri-dentate outwardly without additional serrate 

 teeth, and the joints of the anterior tarsi, and also the shape of the 

 inner claw are similar ; the stridulating striae on the propygidium are 

 obliterated, but a noise is produced by the friction of the elytra 

 with the sides of the dorsal segments of the abdomen. 



This genus is differentiated from Pentodontoschema by the maxillae 

 being six-dentate, and also by the shape of the labial palpi ; the 

 facies is also shorter, the elytra are more ampliate, and the 

 stridulating striae are absent. 



Only two species occur in South Africa. They are closely allied, 

 and the genital armatures are very similar. 



Key to the Species. 



Elytra with very shallow, feebly punctate dorsal striae, intervals 

 plane contracta. 



Elytra with deeply punctate dorsal striae, alternate supra-lateral 

 intervals convex sobrina. 



