176 Transactions of the Royal Society of South Africa. 
on the sides, slightly grooved longitudinally in the centre, and having no 
discoidal impression on each side of the groove ; scutellum punctulate ; 
elytra very closely aciculate, the two dorsal costse are quite distinct ; under 
side finely aciculate, very briefly pubescent. 
Length (excl. of mandibles) 21 mm. ; width 8 mm. 
Hab. Southern Ehodesia (Umtali). 
Tkibe MYLABEINI. 
Mentum ampliate rounded laterally, longer or as long as broad, 
attenuate in front ; ligula elongated, much narrower than the mentum, 
corneous or membranaceous, dilated and deeply sinuated and densely 
pubescent in front ; palps somewhat short ; maxillae robust, inner lobe 
(maxilla) with a broad, thick bunch of fulvous hairs, upper lobe (galea) 
moderately slender, somewhat compressed and as densely penicillate 
inwardly as the inner ; labial palps short, ultimate one truncate ; maxil- 
lary palps moderately long, robust, ultimate one cylindrical and truncate 
at tip, both palps hairy; mandibles sharply arcuate at tip, provided in- 
wardly with a broad corneous membrane having a briefly pubescent edge, 
right mandible with a very distinct inner tooth at a short distance from 
the point ; head slightly longer than broad, provided with large, barely 
incised eyes, epistome usually transverse, labrum long, sinuate in front ; 
antennae robust, short, arcuate, the number of their joints varying from 
eleven to seven, first joint short, more or less clavate, second very small, 
third longer or as long as the fourth, the intermediate transverse, more 
dilated inwardly than outwardly, last one always longer and thicker than 
the others, ovate or swollen outwardly and more or less sharply acuminate 
at tip ; prothorax as long as broad, strongly attenuate in the anterior part, 
sub-parallel in the posterior, truncate at base, and only half as wide as the 
elytra ; scutellum short, semicircular ; elytra elongated, sub- cylindrical 
but slightly ampliated in the posterior part, singly rounded at apex, longer 
than the six-segmented abdomen, and with the shoulders rounded, the 
wings are present ; intermediate coxae situated far from the posterior, but 
set close to the anterior, both being longitudinal, while the posterior are 
transverse ; legs very long ; tarsi very long, slightly compressed, claws 
long, cleft into two, the upper part slightly more robust than the lower, 
and both simple. 
The body of all the species is very hairy ; the elytra, however, are less 
pubescent than the rest of the body. They are black or brown relieved 
by yellow or red patches and transverse bands, the punctuation of which, 
and also the colour of their pubescence, differs slightly from that of the 
background. These patches or bands invade occasionally the greater 
part of the surface, making it difficult to ascertain which is the right 
