-—1oo— 
corium, one basal, two discal, and three ante-apical. Membrane com- 
posed of the five apical areoles. One or more additional nerves some- 
times appear on the disk of the corium. Clavus with two simple parallel 
nerves terminating on the sutural margin. Wings very delicate mem- 
branaceous ; abdominal area large ; costa slightly concave ; supernum- 
erary cell wanting ; first radial simple; second radial forked before the 
apex, each of these forks is.connected by a delicate transverse nerve to 
the adjacent radial, forming three apical areoles ; the two remaining 
radials simple ; a marginal nerve running near and parallel to the outer 
edge of the wing connects all these radials and their branches. Tarsi 
three-jointed, the basal joint of the hind pair almost as long as the second 
and third united. Abdomen short, laterally compressed, showing seven 
segments above and six beneath ; ventral segments after the first much 
depressed within the connexivum ; fifth, or ventral plate, in the male 
sub-cylindric, slightly emarginate at the apex ; in the female flat, ob- 
tusely triangular and distinctly emarginate at the apex. The form of this 
ventral plate in the female, which in Aysthoscopus differs in the various 
species and forms excellent specific characters, in Pediopsis is scarcely 
variable and is of little help in discriminating the species. The characters 
of the genitalia do not differ materially from those of the family ; in the 
male the valve is wanting, the plates are broad and hooked above, the 
styles are ligulate, curved upward toward the apex, and fringed within 
with long hairs. 
The striation of the pronotum radiates from a central smooth line 
obliquely towards the posterior angles. In some species these rugze are 
very prominent, in others feeble and broken up into coalescing punct- 
ures ; the same form of sculpture is found on the upper part of the face, 
but here it is less distinct ; the central smooth line is generally discern- 
able as far as the frontal suture. In the male the clypeus and lore are 
widened and somewhat swollen, obscuring the sutures and giving a 
square appearance to the lower part of the face. Two styles of elytral 
marking may be noted : unicolorous or obscurely clouded elytra, vridis, 
basalis and punctifrons ; transversely banded or maculated elytra, /r7z- 
maculata, bifasciata, flavescens, insignis and ferrugineoides ; the latter 
form does not seem to be represented in Europe, or but feebly in cerea 
etc. #P. viridis as here defined seems to combine the characters of the 
European group represented by wrescens, and that represented by cerea, 
glandacea, &c., the former by the Q wiridis, the latter by the ©; the 
European cerea, &c., exhibit a black dot on the propleura and on the 
outside of the posterior tibia at their base, the former only of which is 
present in the American species. P. punciifrons is the only American 
representative known to me of the spotted-faced series that is so largely 
= 
