236 REVISION OF THE THYNNID.E OF AUSTRALIA, I., 



R. BREViuscuLUS, n.sp. 



g. Head and thorax rugose, the clypeus with a very short 

 carina from the base; antennae very short. The prothorax is 

 narrowed anteriorly, not produced at the angles. Scutellum 

 short, subtriangular, with a faint carina at the apex. Median 

 sef'raent strongly punctured at the base, obliquely truncate and 

 reticulate at the apex, a faint median carina from the base to 

 the truncation. Abdominal segments closely and very finely 

 punctured, the basal segment and epipygium coarsely punctured. 

 A transverse depressed line near the base and a raised mark on 

 each side near the apical margins of segments 2-5, the extreme 

 apical margins of the segments smooth. Epipygium very narrowly 

 truncate at the apex. Black, opaque, with grey pubescence, the 

 abdomen, except the basal segment, ferruginous. Wings hyaline, 

 faintly iridescent, nervures dark fuscous. Length 10 mm. 



9. Head subrectangular, longer than broad, somewhat rounded 

 at the posterior angles, with elongate confluent punctures and 

 sparse pubescence. Prothorax narrow anteriorly, about the same 

 length at the median segment, with a depression on each side on 

 the posterior margin. Median segment with a broad central 

 carina, the lateral margins slightly raised: obliquely truncate 

 posteriorly. The thorax and median segment sparsely punctured. 

 Abdomen long and cylindrical, delicately longitudinally rugulose. 

 Epipygium pointed, with a delicate median carina. Entirely 

 chestnut-brown, the legs testaceous. Length 7 mm. 



Hab. — Mackay, Q.(cJ$ in cop.). 



Near E. aculeatus Sauss., in general appeat ance. The form of 

 the median segment and the delicate sculpture of the abdomen 

 are the most marked distinctions in the male. The female 

 differs much from that of the S. Australian form by the pro- 

 minent carina of the median segment and the sculpture of the 

 abdomen. 



R. TUMiDUS, n.sp. 



(J. Clypeus tumid, with a faint short carina close to the base, 

 thinly clothed with cinereous pubescence. Head closely punc- 



