148 Transactions South African Philosophical Society. [Vvou. XII. 
pygidium triangular, truncate at the apex; abdominal segments, 
legs, and pectus densely villose ; anterior tibiz with two very long 
outer teeth, especially the apical one, and a very small inner spur ; 
intermediate and posterior tibie with an entire, sharp, ciliate, oblique 
carina, apical part of the posterior not much dilated, spurs long, 
sharp ; tarsi longer than the tibiz, not bristly underneath, claws 
long, curved, with the base angular, and a small juxta-basal vertical 
tooth. 
Female: Mentum moderately wide, broadly triangular at apex, and 
with the very short labial palpi inserted laterally, last joint very 
swollen, maxille straight, quite edentate, basal joint of maxillary palps 
very minute, second and third swollen at apex, fourth strongly fusi- 
form, clypeus semicircular with the margin reflexed and slanting in 
front, shorter than the frontal part and separated from it by a high 
transverse keel (C precalva), frontal part with a plain lateral ridge, but 
no distinct transverse basal one; antenne 9-jointed, club 3-jointed, 
ovate, last joint of pedicel laminate but very short; eyes very little 
exposed on the upper side, but facetted like those of the male; pro- 
thorax nearly twice as broad as long, not much attenuated in front, 
rounded laterally; scutellum very broad and long, sub-ogival at 
apex; elytra short, very widely ampliated in the posterior part the 
hind margin of which is straight, but moderately rounded laterally, 
not much convex and not covering completely the propygidium, and 
wingless; pygidium broadly triangular, vertical; abdominal seg- 
ments projecting beyond the margin of the elytra, but very deeply 
sutured ; metasternum somewhat narrow ; anterior tibize tri-dentate, 
the upper tooth very small, the lower one very long, tarsi very short, 
claws also short, weak, simple, hind tibize with faint traces of an 
oblique ridge in the intermediate only, not on the hind ones which 
are moderately ampliated at apex, hind spurs not much thickened. 
From the description of the generic characters of the two sexes it 
will be seen how different they are from each other. Mr. G. A. K. 
Marshall, who has discovered both sexes of one species in the 
Matoppos, near Buluwayo, has sent me the following account of its 
capture: ‘The male was flying about in some numbers in the hot 
sunshine close to the ground over a limited area, and while we were 
catching them, Sheppard called out to me that he had found about a 
dozen coming out of a hole in the ground. Shortly afterwards I 
found a similar bunch of them, but instead of coming out of the 
ground I found that they were burrowing into it after a single 
female. On digging her out I was very much surprised to find how 
utterly different she was from the males in every way. At first I 
thought I must be mistaken in my conclusions, but after a little 
