42 Transactions South African Philosophical Society. [vou. xu. 
The type of the genus, as restricted by Brenske, is 7. rotundatus, 
Casteln., from Senegambia. Until all the numerous species included 
hitherto into this genus have been revised, it is impossible to say 
which belong to Trochalus, Ablaberoides, or other kindred genera,* 
or to obtain an idea of their distribution in Africa, to which 
continent they are restricted. In South Africa they are widely 
distributed, several of the species described by Fahreus as from 
Natal, or what is now the Transvaal, have been recorded by me from 
Damaraland and from Ovampoland in the neighbourhood of the 
Cunene River, but only one species is recorded from the south- 
western part of the Cape Colony, 7. @rugineus, and it ranges from 
? Cape Town and Mossel Bay to Natal and the Transvaal. 
Burmeister described six species from South Africa. Although I 
have not been able to compare, or to have my examples compared 
with the types, I have identified with tolerable certainty three 
of these species described again under another name by Fahreus, 
and which have therefore priority ; another species is probably the 
very type of the genus Ablaberoides of Blanchard; the fifth, having 
a 4-jointed antennal club, may prove to belong to the genus Micro- 
trochalus, in which case it would be a female and not a male as 
suggested by Burmeister; I have not been able to identify the 
sixth, which I suspect, however, to be identical with another species. 
Key to the Species. 
A?, Vertex with a transverse groove running parallel with the base of 
the head. 
B?. Clypeus strongly constricted laterally. 
a*, Anterior tibiee bi-dentate. 
Clypeus tri-dentate in front, and with the lateral margin 
reaching the outer angle of the reflexed anterior margin.. vagus. 
Clypeus not tri-dentate in front, lateral margin reaching 
the centre of the anterior'‘oné .. .. .. .. «.. -«-. damarus. 
at, Anterior tibiw tri-dentate. 
Clypeus angular in the centre of the anterior margin, 
lateral margin reaching the outer angle... .. .. .. chloris. 
* Gerstaeker has described (Gliederthier-Fauna d. Sansibar Gebietes) 3 pecies 
of Vrochalus ; from his descriptions and also from his comparisons, 7’. chryso- 
melinus, which he compares to 7’. picipes, Klug., it having no frontal keel, is not 
a Trochalus ; T'. corinthia, which he compares to 7. bohemani is most likely 
a species of Ablaberoides, but he is wrong in ascribing to 7’. bohemani a transverse 
impression behind the eyes; I have now before me the type of this species, and 
there are no traces whatever of the said impression. J’. swlcipennis is plainly 
a species of Ablaberoides, as proved by the shape of the clypeus. 
