316 Transactions South African Philosophical Society, [vol. xiii. 



Gen. DIPLOA, Kolbe, 



Sitzungsb. Gesellsch. naturf. Freund. Berl., 1893, p. 65; 

 Kaf. Ost. Afrikas, 1897, p. 179. 



Lygyromorphus, Arrow, Ann. and Mag. Nat. Hist., viii., 1901, 

 p. 257. 



Mentum elongated, slightly ampliated laterally towards the apex 

 which is broadly notched, and without any visible traces of separa- 

 tion with the ligula ; the labial palpi are inserted in a very deep 

 lateral cavity similar to that of Myoderma, and the maxillae have also 

 the same shape, but they are more slender, and the galea is slightly 

 shorter and more ovate ; clypeus as long as the head and with the 

 central part of the anterior part projecting, but not reflexed ; 

 antennae short, club nearly equal in length to the pedicel ( ? ) ; 

 prothorax moderately convex, and moderately attenuate rounded 

 in the anterior part, nearly straight laterally, strongly bi-sinuate at 

 the base the outer angles of which are not rounded ; scutellum cordi- 

 form ; elytra slightly sinuate laterally below the humeral callus, and 

 slightly ampliated thence to the posterior part, convex behind; 

 pygidium broad, sub-vertical, slightly convex in the female ; pro- 

 sternum simple, hind coxae not greatly developed ( $ ) ; legs short, 

 anterior tibiae tri-dentate outwardly, but the upper tooth is almost 

 obliterated ; intermediate and posterior tibiae with a feeble tooth 

 on the upper edge, which is plainly crenulate ; apical part of the 

 hind tibiae dilated, upper spur compressed, blunt at tip in the 2 ', all 

 tarsi short, last joint of hind ones dilated at apex but not angular. 



The facies of the insect on which this genus is founded is more 

 that of a Melolonthidous than of a Cetonidous insect, and Mr. G. A. K. 

 Marshall informs me that it flies somewhat in the manner of the 

 former. The buccal organs are similar to those of Myoderma, but 

 the hind legs are more powerfully built, and the thickened hind 

 spurs imply digging or burrowing habits. 



DlPLOA PROLES, Kolb., 



Loc. cit., p. 65 ; 

 Kaf. Ost. Afrikas, 1897, p. 179, pi. 2, fig. 18. 

 D. rufiventris, Arrow, I.e., p. 257. 



Dark chestnut-brown, with the antennae flavescent ; clypeus as 

 long as the head, somewhat concave owing to the anterior margin 

 being plainly raised, diagonally produced in front from the rounded 

 outer angles to a broadly triangular projection, and, like the head, 

 covered with contiguous, sub-scabrose punctures from which spring 



