166 HYMENOPTERA. 
hyaline, the anterior pair having an irregular dark fascia cross- 
ing at the transverso-medial nervure; a second broader fascia 
crosses the wing at the stigma, enclosing the second submarginal 
cell; the apical margins of the wings have a paler narrow stripe 
which unites with the second transverse fascia, the enclosed 
spaces on each side of the second fascia yellow ; the metathorax 
rounded behind, having a central longitudinal impressed line, 
the posterior lateral angles subtuberculate, and the apical por- 
tion of the metathorax transversely striated. Abdomen smooth 
and shining, beautifully adorned with changeable silvery pile, 
which is most dense at the basal margins of the segments. 
Hab. New Holland. 
234. PoMPILUS SEMILUCTUOSUS. B.M. 
Female. Length 6-8 lines.—Black: the head behind, the 
face, mandibles towards their base, and the sides of the clypeus, 
covered with a short cimereous pile; the coxze and femora be- 
neath, the anterior tibie behind, and the intermediate and poste-~ 
rior tibiz at their base and apex above, covered with short cine- 
reous pile ; a spot at the base of the abdomen and the apical 
margins of the segments have a fascia of the same colour ; the 
posterior margin of the prothorax having a narrow band, a trans- 
verse line at the base of the scutellum, a spot on each side of 
the latter, another on each side of the post-scutellum, a spot on 
each side of the base of the metathorax, a waved stripe on each 
side of its apex, of cinereous pile ; the sides of the thorax irre- 
gularly spotted with similar pile ; wings fuscous, their apical 
margins having a darker border; the second submarginal cell 
receiving the first recurrent nervure near its apex, the third sub- 
marginal cell much narrowed towards the marginal cell; the 
tibiae having a few scattered spines exteriorly, the anterior tarsi 
furnished with a row of long cilia behind. 
Hab. New Holland. 
235. PoMPILUS TUBERCULATUS. B.M. 
Female. Length }2 lines.—Black : the head, antenne, tibia, 
tarsi, and tips of the femora, orange-yellow ; the palpi, labrum and 
mandibles yellow, tips of the mandibles black. Thorax covered 
with a short velvety black pubescence, the scutellum compressed, 
the post-scutellum elevated, forming a conical tubercle; the me- 
tathorax rounded and transversely rugose towards the apex, the 
intermediate and posterior tibiee serrated; wings yellow, their 
apical margins having a narrow dark border, their extreme base 
