186 KEVISION OF THE THYNNID^E OF AUSTRALIA, II., 



to base of apical spine The whole abdomen ferruginous-orange, 

 with a large spot of a lighter colour on sides of each abdominal 

 segment. 



9. Clypeus with a carina at base, produced and almost pointed 

 at apex. Mandibles very broad, blunt at apex. Head large, 

 more than half as broad again as long, rounded at posterior 

 angles, moderately convex, with a short longitudinal sulcus 

 between antennae. Pronotum about two-thirds of width of 

 head, anterior margin arched, with a few large punctures along 

 it, the sides parallel. When the head is depressed the prothorax 

 is seen to be produced anteriorly into a depressed and narrowed 

 neck; this is black and seems to be referred to by Smith as the 

 prothorax, the pronotum and mesonotum being mentioned as the 

 mesothorax and scutellum. Mesonotum transverse and very 

 short, rather more than half as wide as pronotum, median segment 

 short, obliquely truncate posteriorly. Abdomen much broader 

 than thorax, first segment with a few indistinct transverse striae 

 and a broad groove just before apical margin; second segment 

 transversely striated, with a broad groove before apex. Pygidium 

 broad, vertically truncate, sides parallel, longitudinally striated. 

 Length 21 mm. 



Hah. — Sydney (Guerin); Goulburn, N. S.W.(Froggatt; <j£ in 

 cop.). 



128. T. (Lophochbilus) WALLISII Sm. 



Thynnus wallisii Sm., Cat.Hym. B.M. vii. p. 14, n. 10, 1859(^2). 



This species is allied to T. rufiventris Guer. Smith's descrip- 

 tion of the male is fuller than usual, but the apical spine of the 

 hypopygium is acute and slightly recurved, not blunt. 



9. Head sparsely punctured, shining, slightly convex, about 

 half as broad again as long, rounded at posterior angles; mandibles 

 broad, and blunt at apex; clypeus narrowly produced, with a 

 delicate carina from base to apex. Thorax sparsely punctured; 

 pronotum much broader than long, nearly as broad as head, 

 anterior margin slightly arched, with a row of large setigerous 

 punctures. First abdominal segment with several low transverse 



