260 PERCY SLADEN TRUST EXPEDITION 
As in the allied genera segments 1 and 2 of the antenne are incrassate, 2 being 
clavate, whereas 3—8 are slender. 2 is about as long as 3 and 4 together. The club is 
flattened and very distinct, 9 and 10 being almost alike, asymmetrical, with one side more 
rounded than the other and the apex as well as the base so narrowed as to form a pedicel ; 
segment 11, which is elliptical, also has a narrow base, the club being very loose, much 
more so than in Acarodes and Holostilpna. The g-antenna is somewhat longer than that 
of the $ and reaches beyond the base of the pronotum. 
The antebasal carina of the prothorax is parallel to the base, and is curved forward at 
the sides in a slightly obtuse angle, the lateral branch reaching to the middle of the sides. 
The short basal longitudinal carina connects the angle of the antebasal carina with the 
true basal angle of the prothorax. The tip of the lateral carina is slightly curved upwards, 
which recalls Acaromimus Jord. (1907). 
The elytra are rather strongly seriate-punctate, the interspaces bearing a row of very 
minute punctures. 
The legs are short and stout, particularly the femora. The hind tibia, and to a lesser 
extent also the mid tibia, is deplanate or excised on the upper side at the apex, this space 
being studded with short erect bristles. The fore tibia, especially in the ¢, is somewhat 
longer than the other tibiz. The first tarsal segment is about as long as the fourth, or at 
any rate not essentially longer. The third segment is broad and the tooth of the claws 
distinct. 
The species, which have a considerable power of jumping as in the allied genera, differ 
from Choragus, particularly in the absence of pubescence from the body, the glossy derm, 
the much smoother pronotum, the tooth near the apex of the mandibles, ete. Holostilpna 
has two lateral longitudinal carinee separated by a groove, and in Acarodes, Acaromumus 
and Xenorohestes, which contain glossy black species, the prothoracic carina is basal, not 
antebasal as in Choragus, Scirtetenes and Holostilpna. 
18. Scirtetinus eumelas, spec. nov. (Plate 15, fig. 8). 
g¢. Ater, nitidus, ore, antennarum basi, tarsis atque tibiarum dimidio apicali plus 
minusve luteis, capite pronotoque lineis impressis tenuissimis rete regulare formantibus 
instructis, angulo laterali carinee subrecto non rotundato, elytris seriatim punctatis. 
Long. (cap. excl.) 0°9—1'7 mm. 
A series. The specimens vary in the extent of the luteous tint, particularly of the 
tibiee, which are sometimes entirely of that colour. The outline of the insect in a dorsal 
aspect is elliptical, but the contour is bent in at the juncture of prothorax and elytra. 
In a lateral view the pronotum and elytra are about double the height of the sterna and 
abdomen. 
The most striking feature of the species is the regular network of engraved lines 
which cover the head and pronotum, the lines forming rather large hexagonal meshes, the 
sides of which, however, are not of equal length, some meshes being even pentagonal. As 
each mesh has a single distinct puncture, the net bears a remarkable likeness to a layer 
of cells, the punctures representing the nuclei. 
The carina is very feebly curved backward in the centre; the lateral angle is not 
