68 HETEROMERA. [ Tomoxia. 
times as long as broad, of a membranous consistency, with the head, legs, and dorsal 
portion of tbe ninth abdominal segment corneous ; these last-mentioned portions of 
the body are yellowish, the rest being white, with the exception of the apex of the 
maxille and Jabium, the frontal margin, and certain tubercles on the ninth abdominal 
segment, which are ferruginous; the head is exserted, quadrate; the prothorax is 
roughly cordate, furnished at base with minute groups of tubercles; the mesothorax 
is very short; the remaining segments are similar, and are slightly incised at their 
joints; the eighth abdominal segment is smooth on disc, and the ninth is nearly as 
broad as the eighth, rather long, gradually rounded and produced into a moderately 
strong style, which is obsoletely bifid at apex and serves as a proleg; neither the 
antennz nor the legs are visible from above, the former being very minute, and the 
latter rudimentary ; the pupa is rather thickly set with minute short conical ‘‘ styli 
motorii,’’ and is terminated by two rather strong cerci; the larva is found mining in 
old beech and other wood. 
T. biguttata, Gyll. (bucephala, Costa). Black or pitchy black, 
clothed with silky pubescence, which in some parts is concolorous with 
the upper surface and in other parts lighter, the base of the elytra, a spot 
behind the middle of each, and a more or less elongate sutural patch 
being most conspicuous ; punctuation very close, somewhat asperate ; 
head broad, antennz slender, reaching about to the base of thorax, dark 
with the basal joints obscurely lighter; thorax transverse, strongly 
bisinuate at base; elytra gradually narrowed to apex, and separately 
rounded obtusely at apex; anal process pointed, truncate at apex, shorter 
than in Mordella ; legs black. L. 45-65 mm. 
Male with joints 5-10 of the antenne oblong-triangular, and the 
femora and anterior tibize clothed with white pubescence on their inner 
side. 
Female with the antenne shorter and joints 5-10 oval-triangular, 
anterior legs not pilose. 
In decaying trunks of willows, oaks, and other kinds ‘of deciduous trees (l6fskogar 
of Thomson) ; also foundon Umbelliferze; rare; all the recorded specimens appear to 
have been obtained in the New Forest, with the exception of one that was taken by 
Mr. Dale off his garden hedge at Glanvilles Wootton on June 28rd, 1870. 
MORDELLA, Linné. 
This genus is a large and extensive one, containing upwards of one 
hundred and fifty species; of these only fifteen occur in Europe, and it 
is much more widely represented in the tropics and the Southern Hemi- 
sphere than any of the other genera of the family, a large proportion 
being found in South America, and several in the Australian region ; 
species have also been described from Ceylon, Tahiti, &., and the genus 
ranges as far north as Siberia ; it is apparently, therefore, general in its 
distribution ; the characters mentioned under J'omoxia will serve to dis- 
tinguish it from that genus ; it is very closely allied to Mordellistena, 
but the latter genus may be known by having the thorax at least as long 
as broad, the antenne more filiform, the eyes evidently more coarsely 
