68 HETEROMERA. 



times as long as broad, of ft membranous consistency, witb the head, legs, and dorsal 

 portion of the 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 

 maxillffiand labium, the frontal margin, and certain tubercles on the ninth abdominal 

 segment, which arc 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 aud produced into a moderately 

 strong style, which is obsoletely bifid at apex and serves as a proleg ; neither the 

 antennae nor the legs are visible from above, the former being very minute, arid 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. big-uttata, 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, antennae 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. 4|-6| mm. 



Male with joints 5-10 of the antennae oblong-triangular, and the 

 femora and anterior tibiae clothed with white pubescence on their inner 

 side. 



Female with the antennae shorter and joints 5-10 oval-triangular, 

 anterior legs not pilose. 



In decaying trunks of willows, oaks, and other kinds 'of deciduous trees (lofskogar 

 of Thomson); also found on Umbelliferse ; 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 23rd, 1870. 



MORDELLA, Linne. 



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, &c., and the genus 

 ranges as far north as Siberia ; it is apparently, therefore, general in its 

 distribution ; the characters mentioned under Tomoxia 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 antennae more filiform, the eyes evidently more coarsely 



