148 Transactions South African Philosophical Society, [vol. xiii. 



pygidium triangular, truncate at the apex ; abdominal segments, 

 legs, and pectus densely villose ; anterior tibiae with two very long 

 outer teeth, especially the apical one, and a very small inner spur ; 

 intermediate and posterior tibiae with an entire, sharp, ciliate, oblique 

 carina, apical part of the posterior not much dilated, spurs long, 

 sharp ; tarsi longer than the tibiae, 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, maxillae 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.prcecalva), frontal part with a plain lateral ridge, but 

 no distinct transverse basal one ; antennae 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 tibiae tri-dentate, 

 the upper tooth very small, the lower one very long, tarsi very short, 

 claws also short, weak, simple, hind tibiae 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 r 

 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 



