HYMENOPTERA. 247 



thin cinereous pubescence ; a denuded space down the middle of 

 the clypeus, which has a few scattered punctures, its anterior 

 margin rounded; the mandibles rufo-piceous, their apex, sub- 

 acute. Thorax thinly clothed with cinereous ])ubescence, most 

 sparing on the mesothorax, which is moderately punctured, the 

 punctures most sparing on the disk, and somewhat elongate ; 

 the scutellum punctured, and having a depression in the middle; 

 the metathorax opake and finely rugose ; wings hyaline, their 

 extreme base and apical margins slightly fuscous, the third sub- 

 marginal cell much restricted towards the marginal. Abdomen 

 ovate, shining, very convex, and with a fine cinereous pile at the 

 base ; the petiole not longer than the first segment ; the apical 

 segment rugose. 



Male. — Very closely resembles the female, but has the anterior 

 margin of the clypeus widely emarginate ; the mesothorax is 

 more closely punctured, and the abdomen not quite so shining ; 

 the two apical segments punctured. 



Hab. Australia. 



38. Sphex carbonaria. B.M. 



Female. Length 13-15 lines. — Black : the face clothed with 

 yellowish-white pubescence ; a smooth shining space down the 

 centre of the clypeus ; the cheeks have a silvery pile, and have, 

 as well as the vertex, a thinly scattered long white pubescence. 

 Thorax : the pro- and mesothorax covered with silvery pubes- 

 cence; when the pubescence is rubbed oiF, the mesothorax is 

 found to be closely punctured, as well as the scutellum; the 

 post-scutellum bitubcrculate ; the metathorax clothed with 

 white pubescence ; wings hyaline, a pale fuscous spot beyond 

 the marginal cell ; the nervures ferruginous. Abdomen smooth 

 and shining ; the petiole covered with white pubescence. 



Hah. Australia (Sydney). 



39. Sphex clavigera. 



Female. Length 1 1 lines. — Black : head closely and rather 

 finely punctured, the face densely clothed with silvery pubescence; 

 tips of the mandibles ferruginous. Thorax subopake, closely 

 punctured ; the metathorax shagreened and thinly covered with 

 yellowish-white pubescence, the sides of the thorax and beneath 

 have a similar pubescence ; the coxa;, trochanters and femora 

 beneath closely punctured ; the legs stout and spinose, the spines 

 short and sparing ; the wings yellow-hyaline, the apical margins 

 fuscous. Abdomen clavate, smooth and shining, covered, parti- 

 cularly towards the base, with a fine reflective silky pile. 



Hab. Australia. 



