176 Mr. M. Jacoby^s contributions to the hnoivledge of 
This species belongs to Suffrian's 13th group which 
contains two other African species with strongly- 
developed mandibles ; the present insect differs in the 
absence of any spots whatever and in the uniformly 
coloured underside. 
Cryptocephalus thoreyi, sp. n.' 
Black, upperside and the legs flavous ; thorax impunctate, with a 
transverse c~D-shaped black mark ; elytra extremely finely punctate- 
striate, flavous, a narrow transverse band at the base, the sucure 
and another narrow band below the middle, black. Length, 1 line. 
Of narrow and parallel shape, the head black, shining, impunc- 
tate, the labrum flavous ; antenna? scarcely extending beyond the 
base of the thorax, flavous ; thorax scarcely widened at the middle, 
about three times broader than long, the sides nearly straight, 
the surface impunctate, bright yellow with a transverse co-shaped 
black mark, leaving the anterior margin narrowly, the sides more 
broadly and a transverse band at the base, of the ground-colour ; 
this latter band is divided by a very narrow black streak at the 
middle ; scutelliim black ; elytra extremely finely punctate-striate, 
the punctures only visible under a strong lens, bright flavous, with 
a narrow transverse black band at the base not extending to the 
lateral margins and joined by the black suture to another transverse 
band below the middle which is distinctly narrowed at the sides to 
a thin streak extending to the margin; underside black, legs 
flavous. 
Hah. Eondeburg, Africa. 
Collection^ Cape Town Museum^ and my own. 
Gryptocephalus atromaculatuSj sp. n. 
Black, the basal joints of the antennae, and the tibiae and tarsi 
fulvous ; thorax fulvous with two large black patches at the sides, 
impunctate ; elytra finely punctate-striate, fulvous ; a large spot on 
the shoulder, a sutural one at the base and two others below the 
middle, black. Length, 1^ line. 
Of short stature, the head black, rather closely and strongly 
punctured, the clypeus fulvous ; the antennae extending to the base 
of the elytra only, the lower five joints fulvous, the rest black 
distinctly thickened, the third and fourth joints equal ; thorax with 
rather strongly rounded sides, the posterior margin finely dentate, 
the surface with a few very fine punctures only when seen under a 
strong lens, the disc almost entirely occupied by two large black 
patches which are joined near the apex, leaving the anterior margin 
narrowly, the sides more broadly and a central ovate spot near the 
