200 REVISION OF THE THYNNIDjE OF AUSTRALIA, II., 



deep punctures with long hairs springing from them in the middle 

 of the apical margin. Second segment above with nine trans- 

 verse carinas, including the recurved apical margin; the three 

 following segments smooth, with a few large punctures near apex, 

 the fifth deeply emarginate at apex above and beneath, strongly 

 obliquely striated beneath. Pygidium contracted near base, 

 very narrow, transversely striated between marginal carinas on 

 the contracted portion, thence obliquely truncated and slightly 

 widened to apex, where it is narrowly emarginate. Black; a 

 spot above base of antennae, a spot on side of prothorax near 

 anterior angle, mesothorax, a broad band above the truncation 

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

 a band broadly interrupted on middle of third segment, curved 

 on sides and nearly reaching apical margin, a spot on each side 

 near apical angles of fourth and fifth segments and a line at base 

 of anterior tibiae yellow. Length 13 mm. 



Hab. — Cooktown(Turner); Cairns, Q.(Nugent)(J; Lizard Island, 

 Q., <j2(Brit. Mus.). 



147. T. pulchralis Sm. 



Thy nnus pulchr alls Sm., Cat. Hym. B.M. vii.68, 1859(<J); Sm., 

 Brenchley's Cruise of the Curacoa, P.43, fig. 4, 1873. 



This very variable species is close to T. dentatus Fab., of which 

 it may possibly prove to be a variety. The colour in both 

 species is very variable, nor is the darker colour of the wings in 

 T. pulchralis a constant character. Both forms occur at Cook- 

 town, but I have not seen T. dentatus from any locality south of 

 Cairns. I have taken a specimen at Mackay almost intermediate 

 in colour, which may prove to be another species, as the hypo- 

 pygium is subconical at the apex instead of truncate or toothed. 



The female can only be distinguished from that of T. dentatus 

 by the rather more strongly raised and regular caiinae on the 

 second abdominal segment, but a long series may show this to be 

 a variable character. 



Hab. — Adelaide, S.A., to Cooktown, Q. 



