204 
Transactions of the Boyal Society of South Africa. 
Mylabkis dentata, Oliv., 
Plate XXIV., fig. 64. 
Encycl. Meth., viii., 1811, p. 97 ; Mars., Monogr., p. 496, pi. v., fig. 52. 
tortuosa, Erichs., Wiegm. Arch., 1843, i., p. 256.- 
Black, clothed on the head, prothorax, and under side with a very dense 
silky flavescent pubescence ; antennae black ; head and prothorax very 
closely and finely punctate, the punctures simple ; elytra with two distinct 
costules on each side and covered with deep, slightly uneven punctures 
of equal size on the yellow parts, and more rugose and slightly shagreened 
on the black intervals ; the pale yellow colour of the transverse bands has 
invaded the greatest part of the black background which is thus reduced 
to a sub-arcuate scutellary patch, a humeral spot and three very narrow, 
transverse, zigzagged bands reaching from side to side, the posterior 
one emitting a supra-outer marginal ramus ending in a small round patch 
situated at about the central part of the supra-apical part. 
Length 14 mm. ; width 5^ mm. 
This species seems to occur along the West Coast of Africa, from 
Senegambia to Damaraland. My examples are from Okahandja in 
Damaraland. 
Mylabris basibicincta, Mars., 
Plate XXIV., fig. 65. 
Monogr., p. 497, pi. v., fig. 53. 
? lacerata, Pering., Trans. South Afric. Philos. Soc, iv., 1888, p. 130, 
pi. 3, fig. 11. 
Intermediate in size and markings between M. dentata and Ceroctis 
groendali. From dentata it differs by the pubescence of the head, pro- 
thorax and under side, and the much more remote and deeper punctuation 
of the head and prothorax ; the black background of the elytra is much 
more rugose, the yellow bands are also more broadly separated ; they bear 
on each side a broad, basal pale yellow band reaching from the suture to 
the outer margin and the lower edge of which is bi-denticulate ; this band 
includes a small humeral black spot ; the ante-median band is not quite 
as broad as the basal, and is strongly bi-incised on each border ; the post- 
median one seems to consist of two coalesced patches, the broader of the 
two being adjacent to the suture, and the borders are thus deeply bi- 
incised ; the apical band, which does not quite reach the suture and the 
outer margin, consists of two patches the outer of which is the smaller of 
the two, and is occasionally narrowly connected with the larger. 
Length 10-lOf mm. ; width 4 mm. 
Hab. Cape Colony (Kenhardt, Beaufort West). 
