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



punctured, -with a strong median sulcus from base to trun- 

 cation, not covered at base by the postscutellum, obliquely 

 truncate posteriorly, with long white pubescence, thickest on 

 sides. First abdominal segment narrowed to base, obliquely 

 concavo-truncate anteriorly, with a deep median sulcus on trun- 

 cation, carinate beneath and truncate at apex, the carina 

 produced into a small tubercle over truncation. The whole 

 abdomen shallowly punctured, most closely and finely beneath. 

 Sixth segment with a spine on each side at apical angles beneath. 

 Dorsal plate of seventh segment above longitudinally striated, 

 broadly subtruncate at apex; hypopygium with a strong spine on 

 each side near base; [apex damaged in the type]. Otherwise as 

 in Smith's description. 



Hah.— Swan River, W.A. (Smith). 



158. T. leachiellus Westw. 



Thynnus leachiellus Westw., Arc. Ent. ii. 2, p. 135, P.77, fig.l, 

 <J, P.83, fig.4, $, 1844. 



Thynnus interrwptus Westw., I.e. p. 115 (nee Klug) [<£]. 



Zaspilothynnus leachiellus Ashm., Canad. Ent.xxxv. 1903 (<JQ). 



(J. First abdominal segment beneath prominent in middle with 

 an oblique triangular truncation at apex. There is a spine on 

 each side of the sixth segment beneath at the apical angles, not 

 of the fifth as Ashmead states. 



Q. The depression on each side of head above antennae very 

 large, reaching to posterior margin. Ashmead seems to rely on 

 this character in founding his genus Zaspilothynnus, but it is 

 found in females of typical Thynnus allied to T. dentatus. 

 Ashmead, with his usual inaccuracy, describes quite a different 

 female in his generic description of Thynnus. 



Rob.— Sydney, N.S.W.; More ton Bay (Brit. Mus.). 



A very common species. 



159. T. vernalis, n.sp. 



£. Clypeus truncate anteriorly, apical angles very slightly 

 prominent, punctured and with a little tine pubescence, which in 



