14 HETEROMERA. [Diaperig. 



times longer than broad) and has the last segment simple, and the prominences at 

 the sides of the abdominal segments without setae ; the prothorax also is transverse ; 

 the pupa is broad, the length being only about twice as great as the breadth, and is 

 covered with rather strong setose tubercles ; the cerci are very small and are curved ; 

 the insect in all its stages is found in boleti. 



!P. boleti, L. Ovate, very convex, glabrous, shining black, elytra 

 with two waved yellow bands, one at base, and another behind middle, in- 

 terrupted at suture, and with the apex also yellow ; head much narrower 

 than thorax, antennae as above described ; head and thorax finely and not 

 very thickly punctured, the latter transverse, gradually narrowed in 

 front, sinuate at base and slightly produced before scutelhim; elytra with 

 nine distinct rows of punctures on each, interstices minutely and sparingly 

 punctured ; legs moderately long, fourth joint of anterior tarsi very small, 

 so that the tarsi appear to be 4-jointed. L. 6 mm. 



Male with the last joint of the maxillary palpi oblong-oval and the 

 thorax slightly emarginate in middle of anterior margin. 



Female with the last joint of the maxillary palpi oval and the thorax 

 not emarginate at apex. 



In boleti, especiitlly on birch ; found in May and June ; once taken in profusion 

 at Barham, Suffolk, by the R --v. W. Kirliy ; Stephens also records it from near 

 Hastings, and from U.ilstmi Wood, Cumberland ; 1 have always been under the im- 

 pression that it has occurred in the New Forest, but cannot tiud any record ; the 

 species has not been found for many years, but it is quite possible that it may again 

 be discovered. 



PZiATYDEMA, Laporte. 



The members of this genus are distinguished from the preceding by 

 the longer first joint of the tarsi, especially of the posterior pair, and 

 also by having the prosternum deplanate between the coxae; the last 

 eight joints of the antennas are thickened. 



The larva of P. dytiscoides (violaceurri) is described and figured by 

 Schiodte (I.e. p. 550, pi. viii. fig. 25); it differs considerably from that 

 of Diaperis in having no projections at the sides of the abdominal seg- 

 ments, so that it rather resembles the larvae of Opatrum and Heliopathes ; 

 it gradually and gently tapers to the apex, which is mucronate and 

 furnished at each side with a small prominence; the colour is fuscous 

 with the abdomen pale fuscous, and the head and apex of abdomen 

 pitchy ; it is found under the bark of oak. The genus contains about 

 eighty species, which are chiefly found in tropical countries, only four 

 occurring in Europe; a considerable number are found in Brazil, 

 Cayenne, &c., and representatives have been described from North and 

 Central America, Cuba, Japan, Ceylon, Madagascar, and the Australian 

 region; our single British species is extremely rare, and has only been 

 found in the New Forest; it much resembles a Chrysomela. 



P. dytiscoides, Rossi (violaceum, F.). Oblong oval, slightly con- 

 vex, glabrous, shining, violaceous with the antennas and legs pitchy, the 



