38 Mr. H. W. Bates on the Longicorn Coleoptera 
fringed beneath ; colour blackish, thinly clothed with grey pile: 
Thorax cylindrical, a little narrowed in front, surface coarsely 
punctured, the punctures here and there running into ruge ; 
greyish black, with six tawny vitte. Elytra linear, very slightly 
narrowed from base to apex, the latter transversely sinuate- 
truncate, both angles acute ; surface thickly punctured, except 
near the apex, greyish black ; each elytron marked with three 
tawny vitte, the “‘nermost one of which is very narrow near 
the base, and all terminate in a broad, subapical, tawny-ashy 
pelt, which is succeeded by a black belt occupying the apex. 
Body beneath and legs grey; sides of breast with two tawny 
streaks. 
Ega, on slender branches. 
3, Megacera rigidula, 0. sp. 
M. linearis tenuis, postice sensim attenuata, griseo-nigra ; capite 
lateribus vittisque duabus verticis cinereo-fulvis; thorace grosse 
sparsim punctato, vittis sex, et elytris utrinque vittis tribus cmereo- 
fulvis, vittis duabus lateralibus elytrorum ante apicem terminatis. 
Long. 43 lin. 
Head with vertex moderately prolonged, face short, slightly 
retracted ; black, clothed with grey pile, eovered with large 
punctures; sides and two convergent vitte on the vertex ashy 
tawny. Antenne rust-coloured. Thorax cylindrical, covered 
with large scattered punctures, some of which are confluent, and 
marked with six tawny-ashy vitte. Elytra slender, eradually 
narrowed from base to apex, the latter sinuate-truncate, with 
both angles produced and acute, the external one most so; sur- 
face coarsely punctate-striate to the apex, greyish rusty black, 
each elytron with three ashy-tawny vittee, all thickest towards 
the base (the lateral one furcate), and the two lateral ones ter- 
minating before the apex in an ashy spot. Body beneath and 
legs grey, the tomentum more dense on the sides of the body. 
Santarem. 
Genus H1ipporsis, Serville. 
Serville, Encyel. Méthod. x. p. 336. 
As already observed in the remarks under the head of Megacera, 
this genus 1s remarkable for the very elon eated narrow form of 
pody, and equally elongated hair-like antenne, which are fringed 
with fine hairs beneath, at least the basal joits. The body is not 
linear, as in Megacera, but is gradually attenuated posteriorly, the 
elytra having their apices prolonged into a point. The degree to 
which this prolongation of the elytral tips 1s carried varies in the 
different species, and offers a good mark for distinguishing some 
of them. In some, namely those which approach Megacera, the 
elytra are simply very obliquely sinuate-truncate at the apex, 
