PLATE IV. 
DESCRIPTION OF A NEW GENUS BELONGING TO THE FAMILY OF 
THE LOCUSTS. 
Tue family of the locusts, Locust, Leach ; (Acridites, Latr., 
Serv. ; Acridiodea, Burm. ;) is one of very great extent, and con- 
tains many species remarkable for their extraordinary powers of 
devastation, (it being now ascertained that other species besides 
the L. migratoria migrate in vast swarms, spreading alarm through- 
out their route,) as well as many others, which, from their remarkable 
forms and brilliant colours, do not fail to attract attention. 
The distribution of the family into sub-families and genera has 
been but comparatively little attended to; and it is greatly to be 
regretted that the works of Burmeister and Serville appeared almost 
simultaneously, so that a considerable diversity exists between them, 
not only in the nomenclature of the genera and species, but also in 
their classification and the limits of the genera. Two of Serville’s 
sub-families, namely, the Truxalides * and the Conophori +, appear 
to blend together very naturally: the genus Peekilocera, Serv., 
(Peecilocera, Burm.,) which is placed by Serville amongst the 
Truxalides, being considered by Burmeister as referable to the 
Conophori ; indeed, the last-named author unites Serville’s genera 
Peekilocera, Petasia, and Phymatea, into one genus. 
The remarkable insects here figured constitute a new genus, 
which still more closely unites these two sub-families. We have in 
fact the pyramidal head, with the oblique face, of the Truxalides, 
and the flattened and dilated basal joints of the antennz, and the 
forehead produced into an obtuse point between the antenne, of 
the Conophori. The remarkable distinction which exists m the 
strueture of the antenne of the opposite sexes is a peculiarity 
which exists, as far as I recollect, in no other species of this family. 
Another striking peculiarity consists in the form of the wing-covers. 
In the typical species, these represent a broad, fresh leaf; while in 
the Chinese species, they are narrower, and resemble a withered 
* Distinguished by having the head pyramidal in front, with the face more or less oblique 
and the antenne often ensiform, with prismatic joints. 
T Distinguished by having the face vertical, the antenne but rarely ensiform, with the joints 
distinct ; the forehead produced between the antenne in a thick joint, with a deep groove 
beneath to receive the base of each of the antenna. 
