4.32 Mr. H. W. Bates on the Longicorn Coleoptera 
Group Saperdine. 
Genus AmILLARus, Thomson. 
Thomson, Archives Entom. i. p. 312. 
In this very distinct genus of Saperdine the body is elongate 
linear, and, in the males, narrowed behind. The eyes are hemi- 
spheric, with a narrow angular emargination for the reception 
of the antenne, the latter being greatly elongated (twice the 
length of the body), with very long and gradually thickened 
basal joint. The legs are moderately elongated, together with 
the tarsi. But the most characteristic peculiarity of structure 
is the form of the claw-joint of the tarsi and of the claws. In 
both sexes the claw-jomt is longer than the second and third 
joints taken together ; but in the males it is also rather abruptly 
dilated and thickened beneath from a short distance beyond the 
base. The claws are nearly straight, compressed, and scarcely 
divergent. 
Amillarus mutabilis, n. sp. 
A. elongatus, linearis, breviter parce setosus, fulvo-rufus, pectore 
medio et abdomine plumbeo-nigris, antennarum articulo basali 
nigro; tarsis tibiisque posticis fuscis; maris elytrorum parte pos- 
tica, foemine elytris totis plumbeo-nigris. Long. 4-6 lin. ¢ Q. 
Head tawny red, vertex marked with a few shallow punctures 
and a smooth central line. Antenne with a scanty fringe of 
short stiff hairs, reddish ; basal joint and tips of other joints 
black. Thorax narrower than the head, broadest in the middle, 
constricted behind, marked with a few shallow punctures, tawny 
red. Scutellum reddish. LElytra tapering in the male, nearly 
linear in the female; apex obliquely truncated, with the outer 
angles dentate; surface smoothly punctured, partly in lines ; 
colour in the males tawny red, with the posterior part more or 
less black, with pale silky pile; in the females wholly black, 
with pale silky pile. Body beneath tawny red; centre of breast 
and abdomen almost entirely black, with silvery silky pile. Legs 
tawny red, tarsi and posterior tibiee dusky. 
Abundant at Santarem on the leaves of shrubs, borders of 
woods. The species seems to differ from the New Granada form 
which has been described by M. Thomson under the name of 
A, apicalis. 
ADDENDA. 
The following species were accidentally omitted-in treating of 
the genera to which they belong :— 
