156 Transactions South African Philosophical Society. [vou. X11. 
process truncate in front, occupying half the length of the claw, and 
with the other half curving above it nearly at right angles. 
This genus is closely allied to Achelyna. 
PLEISTOPHYLLA SINGULARIS, nN. spec. 
Head and prothorax brownish-red; elytra chestnut-brown, 
antennee and under side pale testaceous, the whole of the frontal 
part and the outer and basal margins of the prothorax are densely 
villose, and the pectus and femora are clothed with a very long, 
dense, light fulvous pubescence ; the whole of the head, the clypeus 
included, is covered with scabrose, nearly contiguous punctures ; 
prothorax closely and finely punctured, glabrous, somewhat im- 
pressed in the median projecting basal part; elytra glabrous, but 
with a small fringe of hairs, nearly parallel and with the humeral 
angles rounded, deeply and somewhat coarsely punctate, and having 
on each side four coste the inner one of which is more developed 
than the others ; scutellum glabrous, punctate, and having a median 
raised line; pygidium sparsely aciculate and having a fringe of long 
hairs not set close to each other; abdominal segments with a similar 
fringe ; anterior tibize bi-dentate outwardly. 
Length 104-114 mm. ; width 53-6 mm. 
Hab. Transvaal (Johannesburg). 
Gen. TRICHIODERA, Burm., 
Handb. d. Entomol., iv., 2, 1855, p. 437. 
Mentum wide, twice as broad as long, not incised laterally and 
partly fused with the ligular part which is sinuate on the sides, as 
broad as the mentum at the apex where it is broadly emarginate, 
with the angles rounded; labial palpi inserted on the outer face, 
tolerably massive, last joint swollen, ovate, acuminate; upper lobe of 
maxillee curved and hollowed inwardly, chisel-like at the tip but 
briefly denticulate there, inner lobe inconspicuous, ciliate at tip; 
mandibles triquetrous, somewhat sharp at the tip and shaped there 
like the upper lobe of the maxille, that is to say chisel-like; last 
joint of maxillary palpi long, slightly curved, sub-fusiform outwardly, 
not much acuminate ; head with a strong, slightly arcuate clypeal 
suture, and a finer one on the vertex, not carinate laterally above the 
eyes which are large, the clypeus is arcuate in front with the margin 
tolerably reflexed, the labrum is moderately narrow and incised in 
the centre of the apical part; antenne 9-jointed, third joint 
longer than the fourth, sixth very short, laminate, club formed of 
