148 REVISION OF THE THYNNID^E OF AUSTRALIA, II., 



75. T. (Aeolothynnus) illustris Kirby. 



Rhagigaster illustris Kirby, Horn Exped. Pt. i. 1898. 



(J. Clypeus broad and not much produced, broadly truncate at 

 apex, very finely punctured. Head, thorax and median segment 

 very closely and finely punctured, clothed with short, thin, grey 

 pubescence; pronotum as wide as head, broadly emarginate ante- 

 riorly, anterior margin not elevated; median segment much 

 broader than long. Abdomen elongate, narrower than thorax, 

 segments 2-4 constricted at base, sixth ventral segment with a 

 spine on each side at apical angles. Hypopygium with three 

 spines at apex, the central spine long and stout. Black; sides 

 and apex of clypeus, a small spot at base of each antenna, margins 

 of pronotum obscurely, postscutellum, a narrow, interrupted, 

 transverse band in middle of first abdominal segment, a large 

 spot on each side of segments 2-5 and a minute spot at apical 

 angles of segments 2-4 beneath creamy-white; the two apical 

 abdominal segments ferruginous. Wings hyaline, faintly irides- 

 cent, nervures black. Length 10 mm. 



Hob. — Central Australia. 



The second recurrent nervure is received at the base of the 

 third cubital cell and is almost interstitial with the second trans- 

 verse cubital nervure. The third cubital cell is very short along 

 the radial nervure. 



76. T. (Aeolothynnus) ablatus, n.sp. 



(J. Clypeus produced and rather narrowly truncate at apex r 

 the produced apical portion slightly depressed below basal portion, 

 giving the appearance of a transverse carina; apex smooth, the 

 base finely punctured. Head finely and very closely punctured,, 

 interantennal carina not developed. Thorax and median segment 

 finely and closely punctured ; anterior margin of pronotum 

 straight; median segment rounded. Abdomen elongate, strongly 

 punctured; segments constricted at base, with the apical margin 

 very narrowly depressed. Sixth ventral segment with a spine at 

 apical angles. Hypopygium broad, ending in three long spines, 

 the central spine the longest. Black; mandibles, clypeus in front, 



