1898.] of the Coleoptera of South Africa. 309 



triangular sub-flavescent patch, and an elongate, also supra-marginal 

 one, in the posterior part, beginning at about three-fourths of the 

 length, and reaching the outer angle of the apical margin ; there is 

 no trace of a humeral patch. Length 15 mm. ; width 5 mm. 



I consider as the female of D. transitoria the example without 

 antennae from Lydenburg (Transvaal), here described. The elytra 

 are more elongato-ovate than in the male, the punctures more 

 shallow, as usual, the colour is not so dark on the upper side, the 

 post-median supra-marginal flavescent patch is well denned, whereas 

 it is hardly noticeable in the male. This species is easily distinguish- 

 able by the long sub-cylindrical pro thorax. 



COSMEMA LEYDENBURGIANA. 



Purple-black on the upper side, cyaneous laterally and under- 

 neath ; legs metallic green, with the greatest part of the tibiae and 

 the knees rufescent ; labrum navous (male), head as usual ; pro- 

 thorax narrow, cylindrical ; elytra deeply pitted from the base to a 

 short distance from the apex, suture carinate and prolonged in two 

 horizontal spines not diverging, apical part of the elytra slightly 

 sinuate and with the outer angle sharp ; there is no trace of humeral 

 supra-marginal patch, but there is a conspicuous post-median one, 

 and also an apical one which are distinctly pale yellow and rather 

 wide in comparison to the side. Length 10 mm. ; width 2f mm. 



Female unknown. 



This species resembles C. dolosa in the shape of the prothorax, 

 which is equally long, narrow, and cylindrical, but it is at once dis- 

 tinguishable from it by the shape of the sutural posterior spines, 

 which are divaricating and shorter in the male of C. dolosa, where 

 the apical margin is not deeply emarginate, nor is it acutely 

 angular outwardly ; the sculpture is nearly identical, but there is no 

 humeral white spot in C. leydenburgiana. 



COSMEMA DISCOIDALIS, Horn, 



Notes from the Leyden Museum, 1898, vol. xix., p. 237. 



" Allied to C.furcata, Boh. ; differs in the colour which although 

 hardly darker above, is brassy-green underneath ; the sculpture of 

 the head is a little finer, principally on the vertex ; the prothorax is 

 hardly longer, the median part of the outer sides is for a very short 

 distance more parallel, the transverse folds are a little more pro- 

 nounced, the shining juxta-sutural stria of the elytra is absent, but 



