120 Transactions South African Philosophical Society. [vou. X11. 
Bt. Insertion median, basal joints nearly or quite contiguous. 
C3, Antenne 10-jointed. 
D?. Antennal club tri-jointed. 
E?. Anterior tibie tri-dentate. 
Labrum obliterated, clypeus strongly aculeate 
in the vertical part ; frontal part projecting as 
a laminate keel above the declivous clypeus.. Aipeiopsis. 
E*. Anterior tibis bi-dentate. 
Labrum transverse, very narrow, second and 
third joints of labial palpifused .. .. .. Pseudachloa. 
D*. Antennal club 6-jointed. 
Clypeus laminate, projecting much beyond the 
vertical acuminate labrum  .. .. .. .. «.. Tvrichinopus. 
C?. Antenne 9-jointed. 
Anterior tibiew tri-dentate; antennal club tri-jointed ; 
labrum triangular but with the suture nearly oblite- 
rated ; pygidium strongly drawn forwards .. .. .. Achloa. 
Ct. Antenne 8-jointed. 
Anterior tibiz tri-dentate; antennal club tri-jointed ; 
apex of pygidium reaching to the base of the femora Cdanomerus. 
Gren. ONOCHATA, Erichs., 
Nat. Ins., iii., 1847, p. 654. 
Mentum broad at the base, narrowed at about one-third of the 
length whence it is sub-parallel with the outer angles of the apical 
part slightly rounded, and the apex truncate, yet slightly sinuate 
in the middle, separated on the outer face from the ligular part by a 
somewhat broad, shallow furrow; labial palpi inserted nearly, but 
not quite on the sides, last joint somewhat long, wholly straight 
inwardly, and outwardly only for about half the length, whence it 
is obliquely attenuate towards the sharply acuminate tip; upper 
lobe of maxilla bluntly transverse at the tip, somewhat hollowed 
inside, inner lobe shorter than the upper, tooth-like, and also blunt 
at the tip; maxillary palpi long, apical one straight inwardly, more 
convex outwardly and slightly curved towards the apical part; 
mandibles arcuate and with the upper margin compressed at the 
tip; clypeus as long as the frontal part, slightly ampliated laterally 
from the base towards the basal angles which are only slightly 
rounded, truncate in the anterior part which is nearly laminate and 
projects much beyond the narrow, emarginate labrum, frontal part 
