of the Amazons Valley. 289 
Genus EstHiocena, Thomson. 
Thomson, Systema Cerambye. p. 107. 
In this genus the body is elongated, subdepressed, and paral- 
lelogrammical or slightly narrowed behind, with the apex of the 
elytra more or less truncated, and sometimes dentate. The 
hairy clothing usual in this group is, in some of the species 
of Hsthlogena, short and bristly. The head is small, with no 
depression between the antenniferous tubercles ; the face is short 
and convex, and very slightly prolonged below the eyes. The tho- 
rax is armed on each side with a conical tubercle. The legs are 
moderately long and stout, with subclavate femora and short, 
triangular tarsal joints. The claws are only semidivergent—a 
character which, together with the more elongated body and 
linear elytra, distinguishes this genus from Hstola, to which it 
is very closely allied. The antenne, as in Hstola, are scarcely 
longer than the body, hairy, with the fourth joint a little longer 
than the third, and the remaining joints becoming gradually and 
slightly shorter. The basal joint is short and thick, and nar- 
rowed at the base. 
1. Esthlogena pulverea, u. sp. 
E. elongata, angustata, postice paulo attenuata, breviter setosa, 
cinereo-ochracea; antennis corpore haud longioribus, articulis 
apice fuscis; thorace supra sparsim punctato, vittis sex obscuris 
brunneis, lateribus utrinque tuberculo lato apice spinoso’; elytris 
sparsim punctatis, apice breviter sinuato-truncatis, angulis externis 
productis, cinereo-fuscis, sutura maculaque apicali cinereo-ochra- 
ceis. Long. 43 lin. 
Head small, clothed with laid ashy-ochreous tomentum. An- 
tenn about as long as the body, clothed sparingly with stiff 
hairs, ashy ochreous, tips of the joints, from the fourth, blackish. 
Thorax as wide as head and elytra, slightly uneven on the sur- 
face; sides each with a broad dentiform prominence in the 
middle; disk marked with a few scattered punctures; ashy 
ochreous, disk with two, and sides each with two, obscure 
brownish vitte. lytra elongate, narrowed before the apex, 
which is briefly sinuate-truncate, with the outer angles denti- 
form; surface clothed with fine bristles, marked with a few 
widely scattered punctures, ashy brown, with the suture and a 
spot near the apex ashy ochreous. Body beneath and legs 
ashy ochreous. 
Santarem. 
2. Esthlogena mucronata, n. sp. 
E, elongata, postice paulo attenuata, dense breviter hirsuta, castaneo- 
fusca; pedibus piceo-rufis; elytris confertim cinereo confluenter 
Ann, & Mag, N. Hist, Ser. 3, Vol. xvii. 19 
