250 Mr. C. J. Gahan on Longicorn Coleoptera 
them marked by three deep longitudinal grooves — one 
median, not surpassing the eyes in front ; the remaining two 
oblique, scarcely surpassing the eyes behind, and gradually 
approaching in front so as almost to meet below between the 
antennary tubers. The longitudinal smooth space on the 
middle of the pronotum extends between the anterior and 
posterior transverse grooves ; in its anterior half it is not half 
as broad as in its posterior, and at its anterior extremity ends in 
two small diverging tubercules. The elytra are each rounded 
externally at the apex, cut in somewhat obliquely towards 
the suture, and there furnished with a very short spine. The 
anterior cotyloid cavities are slightly open on the outside. 
Thomson’s specimen is from Borneo ; the two in the British 
Museum are one from Malacca, the other from Java. 
jEolesthes, gen. nov. 
Head with a central plaque in front, with a median, more 
or less distinct carina occupying the interantennary sulcus in 
front, and extending behind almost to a level with the poste- 
rior border of the upper lobes of the eyes. At the termination 
of this carina the vertex bears a shallow foveolate impression. 
Antennae in the male much longer than the body, with the 
third to fifth joints thickened at the apex, with the joints from 
about the fifth to the eighth usually furnished with a minute 
spine at their outer apical termination. The same joints in 
the female more distinctly spined externally, and each also 
spinosely or denticulately produced at its inner apical termina- 
tion. Prothorax strongly rugose above, rounded or subangu- 
late and unarmed at the sides in the middle. Elytra clothed 
with a rich silky pubescence giving moire reflexions ; apices 
truncate, with the angles spinose or dentate. Anterior 
cotyloid cavities very feebly or not at all angulate on the 
outside. Prosternal process usually subtruncate behind. 
In addition to these characters may be mentioned a groove 
which crosses the underside of the head from the base of one 
cheek to that of the other. This groove (in the synopsis 
given below styled the intergenal groove) is usually very 
distinct, and its direction, whether straight or bowed back- 
wards, is useful in separating some of the species. 
The species — some of them common enough in collections 
— which I have comprised in this genus form a fairly com- 
pact group. They are to be recognized by the richness and 
lustre of their pubescence (with a sheen like that of shot silk) 
taken in connexion with their roughly wrinkled and unarmed 
