152 CRABRONIDE. 
the legs with the base and apex of the intermediate and posterior 
cox rufo-piceous; the apex of the trochanters yellow; the 
femora all black ; the tibiz yellow, with a black stain beneath, 
extending sometimes irregularly within the posterior ones; the 
tarsi rufo-piceous, with their basal joint yellow; the anterior 
tarsi ciliated on the exterior, and all the tibie spinose, 
The abdomen black, elongate, lanceolate (the first segment 
much narrowed towards its base, and forming a petiole), with 
five broad yellow bands variously interrupted, and the anus 
yellow, the first and last generally entire, that on the third seg- 
ment sometimes wanting, and those on the fourth, fifth, and 
sixth segments sometimes reduced to a small ovate transverse 
spot on each side, and the sixth occasionally abbreviated on 
each side ¢. 
The ¢ has the antennz simple, slender, and the scape fim- 
briated beneath, and differs in the latter having only a yellow 
line at the side; the mandibles black; the dorsolum less closely 
punctured, and shining; and the thorax generally without any 
yellow markings ; the wings less deeply coloured, but darker 
on the anterior margin; the legs black; the anterior femora 
rufo-piceous at their base and within, the intermediate with a 
testaceous streak inside and outside; the anterior tibize yellow 
above, the intermediate on the exterior, and the posterior at the 
knees, and sometimes at the apex on the exterior, and all the 
tarsi piceous or rufo-piceous; the anterior femora compressed 
and dilated a little behind, their tibize angularly dilated behind 
towards the middle, and irregularly concave beneath, the inter- 
mediate femora concave beneath, and their tibiz irregularly 
excised on the exterior, with a pale dilatation extending along 
their margin; the posterior coxe dilated into a flat and acute 
spine towards their base below, their femora slightly flattened 
within ; their biz clavate; the colour of the abdomen gene- 
rally much less than in the ¢, and consisting frequently of 
merely a band on the first segment, a minute spot on each side 
of the second, a widely interrupted band on the third, another 
