214 CLERUS SP. 
ny 
of their length, this colour then changing to black; the black 
is twice crossed by white wavy bands, the first a narrow one 
just above the juncture of the black with the red colour and 
the other a broad one about $ of the length from the base, Legs 
black. Tarsus of frontlegs 4-jointed, of the hind pairs 5-jointed ; 
ist tarsal joint short. Abdomen on the under-surface is bright 
vermilion, its segments being very mobile. Body short, 
somewhat flattened, pubescent. Length varies from %ths 
4 inch. Males may be of same size as the females or 
inch to 3 
the latter may be much larger. Fig. 4 in Pl. X shows the 
imago of this insect. 
Life History. 
It is probable that this beetle is to be found on the wing 
more or less continuously from spring to the end of autumn in 
the localities which it affects. Its eggs are laid on the 
bark near or in the entrance holes of bark-beetles, and the young 
larvee, on hatching out, find their way through this hole into the 
beetle gallery and thence into the larval galleries of bark and 
wood-boring grubs. Larve of all sizes are generally to be 
found in these situations in, as far as my present observations 
go, every month between May and October. The larvae, as 
their description will have shown, are unmistakeable, but Iam 
not at present able to say whether those noticed belong to more 
than one species of Clerus or not. The larve here alluded to 
were found feeding upon the grubs of the two species of Scolytus 
beetles already described, and are especially predaceous upon 
these, searching them out in their galleries between the wood 
and bark and devouring them. The length of time spent in the 
larval stage is unknown. When full fed, they go into the outer 
bark and pupate there. The beetle; on maturing, never enters 
the tree. [tis a brightly-coloured very active insect running | 
and flying well even in hot sunshine, and it lives outside the tree 
flying round or running about on the outer bark. Its food 
consists of bark and wo od-boring beetles, and it searches for these 
on the bark ail ssize3 them whilst they are engaged in either 
boring into o* tunnelling their way out of the tree. In the case 
of the Scolytus beetles, on which it was preying when disco vered, 

