138 REVISION OF THE THYNNID.E OF AUSTRALIA, II., 



65. T. (Aeolothynnus) crabroniformis Sm. 



Thynnus (Agriomyia) crabroniformis Sm., Cat. Hym. B.M., 

 p.37, n.97, 1859(5). 



(J. The type has the second abdominal segment shining and 

 sparsely punctured; and the median segment is wholly black,, 

 differing in these particulars from all the specimens I have taken 

 in the Cairns district, of which I give a description. The species 

 closely resembles a Cerceris. 



Var. opaciventris, n.var. 



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

 coarsely punctured. Head and thorax opaque, punctured rugose, 

 scutellum punctured, short and strongly convex, broadly truncate 

 at apex. Median segment shining, finely and closely punctured, 

 with a smooth patch on each side at base. Abdomen fusiform, 

 very closely, punctured, with fine pubescence on apical half of all 

 the segments except the basal and apical; basal segment shining, 

 smooth, with a few large punctures at extreme apex, and with a 

 sulcus from base not reaching apex; segments 2-5 constricted at 

 base. Epipygium rugose, subtruncate at apex, the margin slightly 

 raised, with prominent angles. Hypopygium rather narrow at 

 apex, with a stout apical spine between two small spines. Black; 

 sides of the clypeus, interior margin of eyes broadly, a spot at 

 base of each antenna, anterior margin of pronotum narrowly 

 interrupted, tegulae, a spot on mesopleurae, a small spot in the 

 centre and one at each of the anterior angles of scutellum, post- 

 scutellum, a longitudinal spot at apex and a spot on each side of 

 median segment, first abdominal segment, a spot on each side of 

 second, the whole of fifth and sixth segments and the posterior 

 tibiae and tarsi yellow; first abdominal segment in middle and at 

 apex, antennae, anterior and intermediate tibiae and tarsi and 

 apex of posterior tibiae ferruginous. Wings hyaline, faintly 

 tinged with yellow, nervures ferruginous. Length 10-12 mm. 



Q. Clypeus narrowly advanced and with a carina from base. 

 Head finely and sparsely punctured, with a strongly longitudinal 

 sulcus between antennae, strongly rounded at posterior angles, 



