202 REVISION OP THE THYNNID^ OF AUSTRALIA, II., 



truncate anteriorly with a median sulcus on the truncation, a 

 cluster of punctures with long hairs in middle of apical margin; 

 second segment with nine prominent transverse carinse, including 

 the recurved apical margin; pygidium narrow, contracted near 

 base, the contracted portion transversely striated, truncate pos- 

 teriorly, surface of the truncation elongate-oval, and emarginate 

 at apex. Abdomen beneath strongly but irregularly punctured 

 and pubescent, fifth segment coarsely striated. Black; clypeus, 

 depressions at base of antennae, sides of prothorax near anterior 

 angles, mesothorax, except a transverse line near base, a broad 

 transverse band on first abdominal segment, a spot on each side 

 of second, a band near apex of third, emarginate in middle, a 

 transverse band almost interrupted on each side of fourth, a spot 

 on each side of fifth on apical margin, head and thorax beneath, 

 apical half of the two basal segments of abdomen beneath, a spot 

 on each side of the three following segments and legs yellow; 

 coxae and femora above and tibiae beneath black. Antennae and 

 fifth abdominal segment beneath fuscous. Length 17 mm. 



Hob.— King's Sound, N.W.A.(Froggatt), Roebourne, N.W.A. 

 ^ 9 (French). 



A very plentiful species, but I have seen only one female. 



Smith calls T. ventralis a female, but describes a male. The 

 type is not available, but I think the name must apply to this 

 species. 



149. T. emarginatus Fab. 



Tlxynnus emarginatus Fab., Syst. Ent. 360, 2, 1775((J as £). 



£. Clypeus truncate anteriorly, the angles not produced. 

 Pronotum short, narrowed anteriorly, anterior margin raised and 

 as broad as head. Thorax and scutellum shining; mesonotum 

 much broader than long; scutellum very large, broadly rounded 

 posteriorly, postscutellum produced much beyond the vertically 

 truncate median segment, narrowly and deeply emargiuate at 

 apex. Abdomen broad at base, gradually tapering to apex; first 

 segment vertically truncate anteriorly; sixth ventral segment 

 with a short spine on each side at apical angles. Hypopygium 



