232 REVISION OF THE THYNNID^ OF AUSTRALIA, II., 



combined. Head broad, very closely and minutely punctured, 

 interantennal prominence rounded at apex, connected with 

 clypeus by a very short, narrow carina. Thorax very finely 

 rugulose, scutellum broadly rounded at apex, median segment 

 obliquely truncate from postscutellum. Abdomen longer than 

 head and thorax, finely and shallowly punctured, broadest at 

 base, first segment almost vertically truncate anteriorly, beneath 

 with a strong median carina, broadly and vertically triangularly 

 truncate at apex, the sixth ventral segment with the apical 

 angles bluntly prominent. Dorsal plate of apical segment pro- 

 duced and longitudinally striated, rounded at apex. Hypopygium 

 with a strong spine on each side near base, thence elongate and 

 gradually narrowed, ending in a long, slight recurved spine. 

 Black; pubescence grey; mandibles, except at apex, ctypeus, 

 except a small spot on each side near apical angles, margins of 

 eyes, interrupted on vertex, two small spots between antennae, 

 margins of pronotum, narrowly interrupted in middle of anterior 

 margin, a small spot on mesopleurse at base of fore wings, 

 apex of scutellum, postscutellum, median segment, a broad band 

 on apical part of abdominal segments, narrowly interrupted in 

 middle above and broadly beneath, epipygium, prosternum, and 

 posterior coxae beneath orange-yellow. A triangular mark at 

 apex of each abdominal segment dull ferruginous. A narrow, 

 black, transverse line on each side on apical margin of the first 

 five segments. Wings flavo-hyaline, nervures dark fuscous. 

 Length 29 mm. 



£. Head subquadrate, rounded at posterior angles, slightly 

 convex, broader than long, shining, finely and sparsely punctured, 

 almost smooth on vertex, with a delicate longitudinal carina on 

 front. Thorax and median segment smooth and shining, pro- 

 notum about half as broad again as long, slightly narrowed to 

 posterior margin, which is broadly emarginate, anterior margin 

 straight. Mesonotum small, broadly rounded posteriorly. 

 Median segment short, strongly widened from base, obliquely 

 truncate posteriorly, much narrower than pronotum. Abdomen 

 smooth and shining, with a few scattered punctures on apical 



