48 Transactions South African Philosophical Society. [Vvou. X11. 
inwardly; in the male the clasps of the genital organs are symmetrical, 
somewhat narrow, and forceps-lke. 
Length 7-74 mm.; width 5-53 mm. 
Hab. Southern Rhodesia (Sebakwe, Victoria Falls, Salisbury) ; 
‘Transvaal (Zoutpansberg, Lydenburg) ; Mozambique (Beira); Natal 
(Frere, Durban). 
This species will probably prove to be identical with 7. atratus, 
Burm. 
TROCHALUS ORBICULATUS, Nn. Spec. 
Very broadly ampliated, almost orbiculate, but not very much 
convex, chestnut-brown or somewhat dark bronze, opaque, antennz 
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 (3), tri-dentate in 
the other (? ), the median longitudinal keel is quite plain; the sculp- 
ture is the same as that of 7. 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. J have seen two examples only. 
Length 64-62 mm.; width 6+ mm. 
Hab. Transvaal (Lydenburg, Zoutpansberg). 
TROCHALUS MODESTUS, Péring., 
Trans. §. Afric. Philos. Soc., vol. vi., 1892, p. 32. 
Elongato-ovate, testaceous-red, shiny, not iridescent; antennx 
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 7’. 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 64 mm.; width 4 mm. 
Hab. Ovampoland (Omrramba). 
TROCHALUS BADIUS, Boh., 
Ofy. Vet.-Akad. Forh., 1860, p. 115. 
Elongato-ovaté, convex, dark chestnut with a sub-metallic and 
opaline sheen ; antenne flavescent; clypeus quadrate and truncate 
