by C. N. Barker. 175 
The transition, from the sub-marginal banded form of brevicollis to 
clathrata of Dejean, is by a graduated disposition towards elongation 
of the prothorax and elytra, and larger size. There is nothing else to 
separate them. The bands and rami are more broadly developed and 
their coloration is of a richer yellow. The markings are at their 
widest in specimens from Bechuanaland, which on account of their 
very transverse prothoraces are, in this respect, nearer to brevicollis 
than to clathrata. As a generalization, the further from the Cape 
Peninsular, either to the northward or eastward, the species is met 
with, the greater the disposition to elongation, which however does 
not go beyond making the prothorax less transverse, without making 
it longer than broad. The furthest point east I have yet been able to 
trace the form to, is at Committees Drift on the Great Fish River. 
Northward it occurs at Bothaville and Parys just south of the Vaal. 
Outside the S. African sub-region, it occurs at Mossamedes on the 
west coast and at Fort Machakos in British East Africa. In the 
S. African area it does not appear to occur north of the Vaal river, 
being replaced on that side by its analogously patterned ally (. 
bertoloni, Horn, race fasciculicornis, Mihi. 
The race intermedia, Klug., which replaces and at some points 
overlaps clathrata at its eastern limits, has, so far as our South African 
forms go, sufficient claims to entitle it to specific rank. Dr. Horn, 
however, considers it a geographical race of discoidea, Dej., a North 
African form which he ranks as a sub-species of C. brevicol/is, Wied., 
and with which, unfortunately, I am not familiar. In shape, color- 
ation and in details of pattern it is remarkably stable over its very 
extended range, which to my knowledge, includes the Fish River near 
Grahamstown on to the western side, to Beira on the eastern. It 
also occurs inland on the Upper Tugela River, Natal, and the Victoria 
Falls, Rhodesia, where it has followed up the courses of the big rivers. 
From clathrata De}., intermedia, Klug., differs in its narrower more 
elongate facies. The prothorax is longer than broad, straight sided 
and of nearly equal width at apex and base. The antenne are longer 
and more slender than in any of the preceding forms. The elytra are 
narrowly parallel in the males and elongate oval in the females. 
Supra-orbital striation is always present but fine, and the sculpture of 
head and prothorax is of a finer shagreen. The labrum in both sexes 
is narrow and moderately sub-triangularly produced. The elytral 
pattern narrow but complete; of a light testaceous colour, which in 
life shows dusky and contrasts but little with the light bronze ground. 
The punctuation of the elytra is coarse and more spaced than in 
