30 Mr. C. J. Gahan on Longicorn Coleoptera 
half as long again as the fourth. The femora are somewhat 
gradually thickened from the base up to beyond the middle, 
and not abruptly thickened, or clavate, between the middle 
and apex as in some other species of the genus. 
In X. brevipennis the antenne of the male are, according 
to Mr. Bates’s description, much shorter than. the body. 
This character will afford a further means of distinguishing 
brevipennis from denticornis. It is necessary to add, how- 
ever, that the females of some of the species of the present 
genus might easily (without recourse te dissection) be mis- 
tuken for males. 
Xesita spinipennis, Sery. 
Prothorax transversely and almost regularly wrinkled 
above, irregularly ruzose at the sides, slightly narrowed 
anteriorly. Klytra highly polished, very minutely puncta- 
late, and of a reddish chestnut-colour. Femora scmewhat 
abruptly thickened between the middle and the apex. Third 
joint of the antenne in the female—the only sex known to 
me—twice as long as the fourth; the scape thickly and 
somewhat rugosely punctured. The head also strongly 
enough but not very thickly punctured. 
These supplementary characters of X. sp¢nipennis, Serv., 1 
have drawn up from a female example (from Serville’s col- 
lection) which in Chevrolat’s writing has been labelled type. 
It will be well also to direct attention to the fact that the 
species—under the name of X. spintpennis, Serv.—with which 
Mr. Bates has made comparisons in describing soine of his 
species was not the true spzndpennis of Serville, but probably 
X. denticornis (the X. spinipennis of most collections), which 
is quite a different species. 
NXestia vittata, Thoms. 
The specimens answering to the description of this species 
vary considerably in size. 
1 can find no characters by which to distinguish a specimen 
from Dejean’s collection—ticketed X. confusa, Dej.—from 
examples of vittata, Thoms. ‘The antenne are eleven-jointed, 
as in the latter species. 
There is, however, one specimen in the British-Museum 
collection which (in almost every other respect agreeing 
with confusa, Dej.) has twelve distinct joints to the antenna, 
It was no doubt a specimen similar to this which was 
