48 Transactions South African Philosophical Society, [vol. xiii.' 



inwardly ; in the male the clasps of the genital organs are symmetrical, 

 somewhat narrow, and forceps-like. 



Length 7-7-J mm. ; width 5-5J mm. 



Hob. Southern Ehodesia (Sebakwe, Victoria Falls, Salisbury) ; 

 Transvaal (Zoutpansberg, Lydenburg) ; Mozambique (Beira) ; Natal 

 .(Frere, Durban). 



This species will probably prove to be identical with T. atratus, 

 Burm. 



Trochalus orbiculatus, n. spec. 



Very broadly ampliated, almost orbiculate, but not very much 

 convex, chesfcnut-brown or somewhat dark bronze, opaque, antennae 

 flavous; closely allied in general appearance to T. byrrhinus, but not 

 so convex ; the clypeus is nearly truncate in front, with the angles 

 sharp but not reflexed in one of my two examples ($ ), tri-dentate in 

 the other ( ? ), the median longitudinal keel is quite plain; the sculp- 

 ture is the same as that of T. byrrhinus ; the shape of the genital 

 organs is, however, very different : instead of two symmetrical 

 forceps-like clasps, there is on the right side an horizontal, laminate, 

 deeply emarginate, elongate process the upper margin of which is 

 deeply notched near the base, and the apical part recurved and 

 rounded. I have seen two examples only. 



Length 6J- 6f mm. ; width 5J mm. 



Hob. Transvaal (Lydenburg, Zoutpansberg). 



Trochalus modestus, Pering., 

 Trans. S. Afric. Philos. Soc, vol. vi., 1892, p. 32. 



Elongato -ovate, testaceous-red, shiny, not iridescent ; antennas 

 flavescent, with the club very long in the male ; the facies is that of 

 T. placens, but it is less convex, and the shape of the clypeus differs, 

 the anterior part projects also in the middle without being toothed, 

 very much as in T. placens, the outer angles are equally rounded, 

 but the lateral margin does not reach the anterior one, and is very 

 much raised above the constricted part ; the punctuation is similar, 

 but the elytra, which are also more parallel, are plainly striolate on 

 the dorsal and lateral parts. 



Length 6^ mm. ; width 4 mm. 



Hab. Ovampoland (Omrramba). 



Trochalus badius, Boh., 

 Ofv. Vet.-Akad. Forh., 1860, p. 115. 



Elongato-ovate, convex, dark chestnut with a sub-metallic and 

 opaline sheen ; antennae flavescent ; clypeus quadrate and truncate 



