Descriptive Catalogue of the Coleoptera of South Africa, 233 
very plain longitudinal smooth line ; on the elytra the three costules of 
each are very plain, the three juxta-sutural patches are replaced by a mere 
yellow dot, but the outer marginal patches are only slightly smaller than 
in D. quadriguttata. 
Length 14-16 mm. ; width 5|-6|- mm. 
Hah. Cape Colony ; Namaqualand. 
This is very closely allied to the preceding one, and may prove to be 
only a varietal form, but it occurs only in Namaqualand, where it seems 
to be very constant. 
Decatoma adamantina, Pering., 
Plate XXIV., fig. 115. 
Trans. S. Afric. Phil. Soc, viii., 1888, p. 131, pi. 3, fig. 7. 
Black, clothed underneath v/ith a dense black pubescence, on the head 
and prothorax this pubescence is not very dense, and it is extremely 
short and almost invisible on the elytra except in the posterior part ; 
antennae yellow with the two basal joints black, patches and bands on 
the elytra yellow except the supra-apical patch which is red ; head and 
prothorax punctate, punctures round, smooth, and set moderately close to 
each other but not contiguous at the apex of the head and on the posterior 
part of the prothorax ; elytra with the three costules distinct, punctate 
shagreened on the black background, less shagreened on the yellow 
patches and bands which are disposed as follows : a basal dorsal large 
rounded patch coalescing or nearly coalescing with an equally large 
lateral patch, anterior band moderately broad, bi-sinuate in the fore 
border, tri-sinuate in the posterior and also dentate there, posterior band 
as broad as the anterior and equally bi-sinuate, but without the tooth ; at 
an equal distance from this band and from the apical border, and set in 
the inner part of the disk is an ovate red patch. 
Length 15-19 mm. ; width 5-7 mm. 
Hah. Cape Colony (Victoria West, Beaufort West, Kimberley). 
Decatoma histeio. Mars., 
Plate XXIV., figs. 116-117. 
Monogr., p. 58], pi. 6, fig. 8. 
Black, clothed on the under and upper sides with a very dense flaves- 
cent greyish pubescence, appressed but also dense on the elytra ; antennae 
black but with the joints 3 and 4 slightly rufescent ; head and prothorax 
very finely and closely punctate ; elytra with only the median dorsal 
costule usually distinct, the black background is closely and finely 
shagreened, the pale yellow bands and patches being deeply but not 
