682 Transactions South African Philosophical Society, [vol. xii. 



five patches of dark ones on each side ; posterior legs reddish ; head very 

 rugose, clothed with greyish hairs, clypeus sub-parallel and with the 

 angles of the apex sharp, but not dentate ; prothorax very distinctly 

 oblique laterally in the anterior part, and sub-parallel from there to 

 the base, deeply and closely punctate and having past the median 

 part two slight depressions filled by scales ; scutellum sharply 

 triangular, longer than broad and covered with rounder and broader 

 scales ; elyti-a ampliated laterally at about the median part, and having 

 a very strong humeral callus prolonged far towards the median part 

 of the elytra, the space alongside this humeral callus is depressed, 

 and across the suture there are two equi-distant transverse impres- 

 sions, and a supramarginal one beneath the apical part of the costate 

 prolongation of the humeral callus and in a transverse line with the 

 lower impression situated next to the suture, these three impressions, 

 and also a sulcate one on each side of the humeral callus, are filled 

 with a very short, appi^essed black tomentum ; pygidium and abdomen 

 clothed with yellow scales ; anterior tibiae tri-dentate, the two apical 

 teeth connate at base, the basal one stronger and somewhat remote ; 

 posterior femora swollen, simple, hind tibiae also simple, equally 

 swollen, and a little constricted at apex, inner spur distinct ; the four 

 basal joints of anterior tibiae sub-triangular, very closely set, basal 

 one almost obliterated, fifth joint twice as long as the four basal 

 joints put together, moderately swollen, and tri-dentate beneath, 

 claw shorter than the apical joint, curved and simple. 



Female not known with certainty. 



The two examples I have at my disposal are one captured by 

 Drege and from which the description is made, and another in which 

 the prothorax is entirely covered with elongate white scales and has 

 two post-median elongate patches on each side of the posterior part 

 formed by more closely set scales. This is probably the normal form, 

 because the second example is fresher than the one from Drege's 

 collection. 



Hah. Cape Colony (Namaqualand). 



Pachycnema alternans, Burm., 

 Handb. d. Entom., iv., 1, p. 61. 1844. 



Head and protliorax l)lack, elytra and hind tibiae reddish in both 

 sexes ; prothorax with a marginal band of yellowish white scales, a 

 median longitudinal line and three spots on each side of it ; elytra 

 with three longitudinal bands of similar scales ; propygidium and 

 pygidium clotlied with yellow scales ; head very rugose, clothed with 

 black hairs, clypeus very little narrowed towards the apex, long, sub- 



