230 Transactions of the Boyal Society of South Africa. 
suture a moderately large patch of the black background, the humeral 
patch is continued along the margin as a narrow band coalescing there 
with the anterior band the hind border of which is produced behind along 
the suture as a sub-quadrate projection, and is bi-sinuate thence to the 
outer margin, the post-median band is narrow, of nearly equal width 
throughout, and each border is plainly bi-sinuate ; the apical flavescent 
pubescent patch is distinct. The last joint of the black antennae is similar 
in shape to that of D. undata. 
Length 8 mm. ; width 3^ mm. 
Hab. Cape Colony (Stellenbosch). 
Decatoma contorta, Pering., 
Plate XXIV., fig. 108. 
Trans. S. Afric. Phil. Soc, iv., 1888, p. 132, pi. 3, fig. 6. 
Allied to D. midata, which it seems to replace in the Transvaal. It is 
somewhat larger ; the pubescence on the head and prothorax is silky 
flavescent instead of being greyish black, and the sculpture is more 
closely set, but that of the elytra is almost similar ; the last joint of the 
antennae is strongly swollen outwardly in the manner of D. undata and 
stellenboschiana ; on the elytra the outer part of the basal dorsal lunule is 
prolonged as far as the fore edge of the median part of the anterior trans- 
verse fascia of which, like in the post-median one, both edges are very 
sharply tri-sinuate. 
Length 11 mm. ; width 4|- mm. 
Hab. Transvaal (Potchefstroom, Bocksburg, Pietersburg) ; Cape 
Colony, Bechuanaland. 
I have seen examples in which the bands of the elytra are as narrow 
as in examples of D. undata, from which they can be distinguished only 
by the less swollen apical joint of the antennae. 
Decatoma africana, Oliv., 
Plate XXIV., figs. 109, 110. 
Entom., iii., 47, p. 12, pi. 2, fig. 21 ; Mars., Mon., p. 571, pi. 6, fig. 4. 
? decipiens, Mars., p. 574, pi. 6, fig. 3. 
Black, covered with a pubescence greyish underneath, black and 
greyish flavescent on the prothorax, and black on the elytra even on 
the yellow patches or bands ; antennae black ; head and prothorax very 
closely pitted, the punctures separated by narrow, raised, irregular walls, 
frontal part with a not very distinct median line ; elytra very closely 
pitted, the punctures forming a shagreened surface on the black back- 
ground, but with the intervals smooth on the pale yellow part which, in 
