156 REVISION OF THE THYNNIDiE OF AUSTRALIA, II., 



(J. Labrum long and narrow, strongly bilobed at the apex; 

 clypeus narrowly produced and truncate at the apex, maxillae 

 smooth, first joint of the maxillary palpi short. In nearly all 

 the species there is an acute tubercle at the apex of the first 

 ventral segment of the abdomen, and the hypopygium has an 

 apical spine only. Antennae rather short and of even thickness 

 throughout. Second recurrent nervure received near the base of 

 the third cubital cell. 



9- Head strongly flattened in most of the species; second 

 abdominal segment marked with five transverse carina?, fifth 

 ventral segment punctured. In all the species, except A. 

 adelaidce, the tarsal ungues are bidentate. Pygidium lanceolate- 

 ovate or more rarely lanceolate. 



Type, Agriomyia maculata Guer. 



85. T. (Agriomyia) maculatus Guer. 



Agriomyia maculata Guer., Voy. Coq. Zool. ii. 2, p. 218, 1830 

 [1839](<J); Guer., Mag. de Zool. xii. p.3, P. 100, figs. 1-4, 1842(<J); 

 Sauss.. Reise de Nov. Zool. ii. 1, Hym. p. 1 16, n.l, 1867( ( J). 



Var. Thynnus {Agriomyia) odyneroides Westw., Arc. Ent. ii. 2, 

 p.109, P.75, figs.3-4, 1844(5$). 



Var. Thynnus variegatus Klug, Physik. Abh. Akad. Wiss. 

 Berlin, p.20, n.12, P.l, fig.3, 1840[1842](£). 



In spite of the differences in colour and size I cannot find any 

 sufficient ground for division in this common species. The male 

 varies much in the yellow markings on the thorax; T. odyneroides 

 Westw., which seems to be the commonest form in Victoria and 

 the western country of New South Wales, is without yellow on 

 the median segment; while the commonest form from Sydney 

 northward is without the yellow mark on the scutellum, but has 

 that on the median segment well developed. The typical form 

 seems to be from S. Australia. T. variegatus Klug, seems to be 

 close to the Sydney form. 



I have seen very few females, but there does not seem to be 

 much variation. In one specimen from Tasmania, where the 

 prevalent male form is T. odyneroides, the pronotum is rather 



