103 



SPHEGIGASTERINI. 



Pterosemoidea, new gen. 



9 . Agreeing with Pterosema, Foerster, but the antennae 

 with 3 ring-joints ; propodeum long, with an obscure, obtuse, 

 median carina at base only, the neck distinct. Postmarginal 

 vein long, nearly as long as the marginal, which is a third 

 longer than the well-developed stigmal. iVbdominal petiole 

 short but distinct ; funicle- joints longer than wide. At least 

 one mandible 4-dentate. Differs from Pterosemella in lacking 

 the median carina on the propodeum; the lateral carinas are 

 complete. Third segment of abdomen only half the length of 

 the second, the abdomen acutely convexed beneath at middle. 



(S . Not known. 



Type. — The folowing species. 



Pterosemoidea flavipes, new sp. 



9 . Metallic grass-green, the abdomen darker; punctate, 

 including the propodeum. Scape and legs, except tarsi, 

 brownish-yellow; rest of antennae dusky-yellowish. Winga 

 hyaline. Scape long and slender ; pedicel somewhat shorter 

 than first funicle-joint, which is subequal to the next two 

 joints, the distal joint only slightly wider than long ; club 

 3-jointed, ovate, somewhat longer than the funicle. Length, 

 1 <6Q mm. 



c? . Not known. 



Hah. — South Australia: Port Lincoln (A. M. Lea). 



Type. — I. 1339, South Australian Museum. One speci- 

 men on a card and a slide bearing head, antennae, and a pos- 

 terior leg in fragments. 



Apterosemoidea, new gen. 

 Type. — The following species. 



Apterosemoidea nigriviridis, new sp. 



9 . Nearly black, the abdomen very dark metallic-bluish ; 

 coxae and most of femora concolorous, the rest of the legs 

 yellowish ; wings hyaline ; scape dark-fuscous, the flagellum 

 black. Mandibles 3- and 4-dentate ; propodeum with very 

 obscure lateral carinae but no median, long, punctate; abdomen 

 depressed, its upper-surface subconvex, segments two and three 

 long, subequal, both together occupying over half the surface, 

 the following segments a third shorter and more or less equal. 

 Coarsely punctate, including the propodeum, the abdomen 

 smooth and shining, its petiole nearly as long as the posterior 

 coxae. Propodeal spiracle minute, round. Funicle-joints all 

 somewhat longer than wide. Length, 1*35 mm. 



