404 Annals of the South African Museum. 



C : . Pronotum without silvery band or patches, but with a slight 



marginal white sinus. 

 Anterior lobe hardly serrate : 



Vertex and labrum closely granular . . . unicolor. 



Vertex and labrum with scattered granules . . immaculata. 



Sides of pronotum with slanting silvery bands. 

 C 1 . Anterior lobe of pronotum 4 times incised, 4 or 5 distinct 

 slanting silvery patches on each side : 



Humeral siims reddish or cretaceous, crest red . . discolor.. 



Humeral sinus and crest not red .... ocellafa. 

 B 1 . Anterior and intermediate tibiae tuberculate. 

 A-. Pronotum less tectiform. Anterior lobe of pronotum 6-serrate, 



sides with 5 supra-lateral silvery bands . . . intermedia. 



A 1 . Pronotum very highly arcuate. Anterior lobe of pronotum 



7-8 serrate, no supra-lateral silvery bands . . . longicornis* 



BULLA UNICOLOR, Linn. 



Syst, Nat, (x) i, 1758, p. 427. 



miens (pt,), Thunb., Vet. Ak. Hancll. 36, 1810, p. 57, pi. 2, fig. 1. 



(J . Uniform pale green Avith the edge of the crest flavescent or 

 yellow ; head, sternum, anterior part of pronotum and legs villose ; 

 prouotuni tectiform, the crest simple, that of the anterior lobe nearly 

 following the curve of the crest, and therefore not retuse ; face roughly 

 varicose and even granular ; anterior lobe of pronotum roughened and 

 granular, the folds somewhat indistinct, posterior lobes very roughly 

 coriaceous, no markings below the humeral ridge ; abdominal seg- 

 ments with or without ocelli-like lateral patches, anterior and 

 intermediate tibiae with indistinctly tuberculate impressions. 



Length 35-37 mm. 



? . Uniform grey or greenish, a narrow silvery white border along 

 the lateral siuuation, abdomen closely maculated with silvery grey 

 spots which are, however, occasionally absent ; second, third and 

 fourth basal segments with a lateral silvery, elongate patch; head 

 rugose granular ; pronotum very roughly punctate and with distinct 

 scattered granules denser in the lower lateral part, crest of the anterior 

 lobe irregularly denticulate, the incised folds plain. 



Length 30-34 mm. 



As usual the juvenile forms are more granular than the adults. 



The $ is shorter than the other species. The habitat of unicolor 

 extends inland from the sea-board, from Cape Town to Namaqualand. 

 In examples from there the pronotum and head are usually a little 

 more rugose than in examples from intermediate parts. 



