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



55. T. (Aeolothynnus) iridipennis Sm. 



Thynnus (Agriomyia) iridipennis Sm., Cat. Hym. B. M. vii. 

 p.38,n.99, 1859(^9). 



Thynnus strangulates Sm., Descr. n.sp. Hym. p. 166, n.22, 

 1879((J2). 



<J. Clypeus produced and rather narrowly truncate at apex, 

 strongly punctured, with a short carina from base not reaching 

 centre. Head shining, very closely punctured. Thorax shining,, 

 finely and sparsely punctured, anterior margin of pronotum 

 straight and raised; scutellum strongly elevated in centre, oblique 

 anteriorly. Median segment smooth and shining at base, finely 

 punctured at apex. Abdomen elongate, segments constricted at 

 base, the apical margin very narrowly depressed; sparsely punc- 

 tured and shining. Epipygium narrow at apex, the apical 

 margin slightly raised; hypopygium ending in a slightly recurved 

 apical spine. 



£. Head smooth and shining, with a few punctures on front, 

 a little broader anteriorly than long, narrowed behind eyes,, 

 clypeus with a median carina. Thorax finely and sparsely punc- 

 tured; pronotum nearly twice as broad anteriorly as long, a little 

 narrowed posteriorly. Median segment smooth, oblique from 

 mesonotum. Abdomen almost smooth; second segment with four 

 transverse carinse, including the raised apical margin. Pygidium 

 narrow, the sides, as far as can be seen, nearly parallel. 



Hab. — Adelaide, S. A. (Smith); Lower Plenty, Vic. (Bakewell)' 



The type of T. iridipennis is lost, but a male in the British 

 Museum answers well to the description, and does not differ 

 appreciably from the type of T. strangulatus, except in the 

 coloured markings. Smith says that the female of T. iridipennis 

 has only two carinse on the second abdominal segment, but the 

 basal carina in the allied species is so often covered by the apex 

 of the first segment that he might easily have been mistaken. 

 The type of the female of T. strangulatus is damaged on the 

 abdomen, 



