532 Transactions South African Philoso2)hical Society, [vol. xii. 



Hyboschema contracta, Bohem., 

 Plate XL., fig. 17. 

 Heteronychus contractus, Insect. Caffr., ii., p. 4. 



Black, with a piceous tinge, and occasionally dark chestnut, not 

 very shining, glabrous, with the prosternum clothed with long, dense 

 fulvous hairs ; head covered with deep, round punctures, except 

 along the base, clypeus very acuminate and with the narrowed 

 median part transverse, reflexed and very slightly incised in the 

 centre but not dentate, there is a transverse not well defined cl}^eal 

 raised line ; prothorax convex, one-third broader than long, distinctly 

 attenuate in a sub-elliptical fashion laterally from the anterior angle 

 to about one- third of the length, and from there slightly ampliated 

 diagonally as far as the posterior angle which is sharp, basal part 

 marginate, the surface is covered with round punctm'es set equally 

 far apart but moderately close to each other ; scutellum broadly 

 ogival, impunctate ; elytra short, only longer by one-third than 

 the prothorax, very convex especially behind, produced diagonally 

 laterally from the humeral angle to past the middle where they 

 are ampliated especially towards the posterior part, they have 

 in the dorsal part five narrow striae, very slightly punctured, or 

 sometimes not punctured at all, and the three supra-marginal striae 

 consist of a series of deeper, round punctures, the intervals are 

 impunctate and plane ; pygidium finely aciculate along the margin, 

 finely shagreened laterally and with the slightly convex part smooth ; 

 inner claw of anterior tarsi constricted at base, long, curved, 

 simple and sharp at tip ; anterior tibiae sharply and strongly tri- 

 dentate ; median part of metasternum small, plane, and with a fine, 

 impressed longitudinal line. 



Length 13-17 mm. ; width 8-10 mm. 



Hab. Cape Colony (East London), Natal (Durban). 



Hyboschema sobrina, n. spec, 

 Plate XL., fig. 18. 



Black or dark chestnut on the head and prothorax, and with the 

 elytra lighter, opaque, glabrous ; head as in the preceding species, 

 but having a smooth, median space along the clypeus which is also 

 reflexed and not at all incised ; the prothorax is similar in shape 

 and punctuation ; the elj^tra are less ampliated laterally behind, 

 and as the outer margin is distinctly depressed the ampliation is 

 hardly noticeable, they are deeply striate, all the striae are deeply 

 punctate including the juxta-sutural one and the fifth and seventh 



