201 
cles depressed; eyes large, oblong, ashy tawny. Antennse a 
little longer than the body in the male, about the same length 
in the female ; terminal joints shorter than the median ones, 
last joint short and pointed ; basal and five succeeding joints 
densely clothed beneath with very fine hairs ; colour ashy brown. 
Thorax scarcely so long as broad, surface closely wrinkled, many 
of the wrinkles not continuous; colour ashy brown. Elytra 
cylindrical, convex ; shoulders somewhat prominent ; basal fourth 
of the surface studded with small, regular granulations, accom- 
panied by punctures; finely punctured in the rest of their sur- 
face ; colour ashy brown, deflexed sides paler. Body beneath 
and legs tawny brown ; base of abdomen on each side, and hind 
legs, sooty brown. 
Ega and S. Paulo, Upper Amazons, on slender woody stems. 
Genus Cacostola (Dej. Cat.), Fairraaire. 
Fairm. Ann. Soc. Ent. Fr. (1859), p. 532. 
This genus, imperfectly characterized by M. Fairmaire, com- 
prises a number of small-sized linear insects, closely allied to 
Hesycha and Trestoma^ but distinguished by their narrow forms, 
obscure coloration, and especially by their much shorter heads, 
the muzzle being very little prolonged beyond the lower margin 
of the eyes. The antennse are moderately distant at their bases, 
their supporting tubercles having a conical projection on their 
inner sides; they are slender, filiform, naked, and very little 
longer than the body ; their first joint forms a smooth club, 
their third joint is in some species curved, and their terminal 
joint is at least as long as the preceding. The thorax is short 
and cylindrical, with a scarcely perceptible prominence in the 
middle of each side, and the surface punctured, not wrinkled 
transversely. The elytra are linear, obtusely rounded at their 
apices, and their surface is free from ridges and tubercles. The 
legs are short, the thighs clavate, and the claw-joint of the tarsi 
longer than the remainder taken together. The sterna are 
narrow, the pro- and mesosterna of equal width, and simple. 
The species are found, like the Trestoni(Pj clinging to slender 
decaying branches of trees. 
1. Cacostola simplex j Pascoe. 
Pachypeza simplex, Pascoe, Trans. Ent. Soc. n. s. v. pt. 1, p. 44. 
C. linearis, griseo-fusca ; thorace elytrorumque lateribus griseo 
lineatis ; capite latiusculo ; antennis articulo tertio subrecto. 
Long. 4|-5 lin. d $ • 
Head moderately broad ; forehead uneven, and, with the 
u 
