1904. ] Catalogue of the Coleoptera of South Africa. 191 
joint very small, second sub-cylindrical and a little longer than the 
third, which is acuminato-ovate ; mandibles very robust, triquetrous 
outwardly, curved, hollowed inwardly and sometimes bi-dentate at 
the tip ; maxillee robust and having a brush of fulvous hairs at the 
tip of the inner lobe, and ending in two robust, not much curved, 
strongly bifid teeth at the top and a double one lower down ; maxil- 
lary palpi moderately long, the ultimate joint nearly cylindrical and 
truncate at the apex, but occasionally slightly swollen towards the 
base and sub-acuminate at the tip (cdliata, crinita, &c.); antenne 
10-jointed, the 3-jointed club nearly as long or longer than the 
pedicel in the male, shorter and either ovate or elongated in the 
female ; head broad or moderately broad, clypeus vertical in front, 
like the strongly developed labrum, with the anterior margin slightly 
reflexed and more or less broadly truncate or slightly sinuate, and 
having sometimes a longitudinal median raised line, there is always 
a clypeal, sharply raised keel * set very close to the frontal suture, 
which disappears very often, especially if this clypeal keel is not 
arcuate, and in addition there is another keel on the base of the 
vertex, which is, however, always less sharp than the clypeal one, 
and is occasionally grooved; the prothorax is sinuate in front and 
behind, always narrower in the anterior than the posterior part, 
amplated past the middle if seen from above, and either rounded 
there and narrowed thence towards the base which is either angular 
or broadly rounded, or nearly straight thence to the sharply angular 
base, it is convex, covered with punctures, either round, cicatricose, or 
with scabrose edges, the outer margin is always more or less sharply 
serrate and has a fringe of long sete, and the base occasionally a 
much denser fringe; the scutellum is more or less sharply ogival, 
and has one or more lateral series of foveolate punctures, it is often 
a little more acuminate in the male than in the female; elytra not 
broader at the base than the prothorax at its widest part, sinuate 
laterally before the middle, more or less ampliated thence towards 
the posterior part, convex, covering one-half of the propygidium, 
covered with deep, equi-distant punctures, marginate all round and 
having a somewhat narrow epipleural fold, the outer margin has a 
fringe of somewhat remote sets, diminishing in size from the base to 
past the median part, but one species (S. globator) has in the posterior 
part a thick, brush-like fringe of fulvous hairs; pygidium broader 
than long, arcuate at the base, semicircular, more or less deeply 
punctured, glabrous all round; penultimate abdominal segment 
often wider than the antepenultimate, ultimate one either narrow or 
comparatively broad, and having a fringe of short or long hairs along 
* In S. barda this keel is very indistinct. 
