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 cinereous pile ; the coxae and femora be- 

 neath, the anterior tibiae behind, and the intermediate and poste- 

 rior tibiae 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 12 lines. Black : the head, antennae, tibiae, 

 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 tibiae serrated; wings yellow, their 

 apical margins having a narrow dark border, their extreme base 



