380 Col. C. T. Bingham on, S. African mid Australian 



Rhynchium nigrolimbatum, sp. nov. 

 W. Australia : Towranna Plains : 1898 (Clement). 



9 . Chrome yellow, the head above and the 2nd abdominal segment 

 black, the clypeus, the front below the anterior ocellus extending 

 into the emargination of the eyes, and the antennae chrome yellow, 

 mandibles reddish yellow ; wings dark fuscous purple, hyaline along 

 their posterior margins. Head above closely and coarsely rugose 

 punctate, the punctures on the front in certain lights running into 

 striae, clypeus sparsely and very shallowly punctured almost smooth, 

 the apex transversely truncate not emarginate, eyes large reaching 

 the base of the mandibles ; these latter coarsely longitudinally 

 striate and punctured. Thorax longer than broad finely punctured, 

 the prothorax vertically transversely truncate anteriorly, mesonotum 

 convex, scutellum and postscutellum flat, the former almost square 

 the latter transverse, both separated from the mesonotum anteriorly, 

 from each other, and from the median segment posteriorly by well- 

 marked transverse sutures ; median segment long, concave posteriorly 

 bearing a medial fine longitudinally impressed line, and with the 

 lower posterior angles somewhat produced. Wings ample, the 2nd 

 cubital cell in the forewing trapezoidal receiving both recurrent 

 nervures; legs short slender pubescent, claws unidentate. Abdomen 

 massive, the basal segment narrow, beneath with a triangular 

 depression and a subapical transverse groove, above convex and 

 rounded ; 2nd segment elongate broadening posteriorly. 



Length 9 14 mm. (to apes of 2nd abdominal segment). Exp. 30 mm. 



Described from a single example. 



Alastor abnormis, sp. nov. 

 W. Australia : Towranna Plains : 1898 {Clement). 



^ . Orange yellow, head and the 2nd abdominal segment black, the 

 clypeus, a mark somewhat in the shape of a chess pawn above it on 

 the front, and the scape in front orange yellow ; wings fuscous, 

 hyaline along the posterior margins. Head from above transverse 

 as broad as the thorax, closely and somewhat coarsely rugose 

 punctate above and behind the eyes more finely and sparsely punc- 

 tured on the front and clypeus, the latter covered with a fine silky 

 short white pubescence, somewhat pyriform with the apex truncato- 

 emarginate. Front with the orange macula raised carinate. Eyes 

 large reaching to the base of the mandibles, mandibles long toothed 

 on the inner margins. Antennae subclavate somewhat like that of 



