134 CRABRONIDA. 
extreme base of the metathorax into an impressed triangle, 
which is longitudinally striate, the subcordiform space between 
it and the transverse line that forms the cross convex on each 
side, and obliquely striated at the base of the posterior portion 
of the metathorax—the longitudinal line dilates into a deep 
fossulet, on each side whereof it is deeply transversely striate ; 
the apex of the peristethium armed on each side with a minute 
tooth; the collar with a transverse interrupted line, and the scu- 
tellum with a lunule, both yellow; the tegule piceous, and the 
ligament at the base of the wings yellow; the wings iridescent, 
with a darkish cloud towards their apex, the nervures piceous ; 
the anterior legs yellow, with their coxz and trochanters black, 
and a line on the exterior of their femora and tibiae and at the 
apex of the tibice within also black ; their tarsi whitish, the first 
joint dilated on the exterior into a half-heart shape reversed, 
and the following triangular, the four first covered with a silvery 
pubescence and the first joint with a black patch towards its ex- 
terior margin, the last joint also black; the four posterior legs 
black, with their knees and lower portion of their tibiz yellow ; 
the tarsi of the intermediate pair whitish, with the apex of the 
two first joints and the whole of the last black, the posterior 
tarsi black, with the base of the first joint whitish. 
The abdomen oblong, black, minutely punctured, and having 
a slight griseous pubescence, the first segment gradually narrowed 
at its base into a petiole. ¢ 
& in my own Cabinet. 
t4+ I am unacquainted with the ¢ of this species. 
The sex described is very like what Van der Linden and 
St. Fargeau consider the Sphea palmipes of Linneus ; but 
mine sufficiently differs from the insect described by the 
former by having the base of the metathorax striated : 
nor does he notice the minute tooth on each side of the 
peristethium, which this has in common with several 
species. I have captured it at Highgate settling on the 
leaves of the burdock and other plants. 
