216 REVISION OF THE THYNNIP^ OF AUSTRALIA, II., 



yellow, all the segments at base and sides and apical margin of 

 second segment black. Legs fuscous. Length 15 mm. 



Hah. — Champion Bay, W. A. (Smith; ^9 in Brit. Mus.). 



The pronotum in the female is broadly emarginate anteriorly, 

 and there is a very slight subtuberculate prominence in the middle 

 of the first abdominal segment above the basal truncation. 



165. T. picticollis, n.sp. 



£. Head nearly twice as broad as long, very sparsely punctured, 

 a short longitudinal sulcus on front. Pronotum as broad as 

 head, half as broad again as long, very slightly narrowed pos- 

 teriorly, almost straight on the anterior, broadly emarginate on 

 posterior margin, very finely and closely punctured, a few deep 

 punctures along anterior margin. Mesonotum and median seg- 

 ment sparsely punctured, median segment very short, depressed, 

 vertically truncate posteriorly. Abdomen smooth with a few 

 scattered punctures, first segment truncate anteriorly, with about 

 four irregular transverse carina? near apex, including the raised 

 apical margin. Second segment broader than first; with about 

 fifteen transverse carinas, decreasing in elevation from the recurved 

 apical margin to the basal carina?. Pygidium contracted, smooth 

 at base, vertically truncate posteriorly, strongly contracted and 

 transversely striate just before truncation, surface of truncation 

 oval and finely longitudinally striated, smooth at apex. Beneath 

 the first segment is prominent at the base, with a groove between 

 first and second segments, all the segments shining with sparse 

 punctures, except fifth which is rugose at base in middle, else- 

 where coarsely obliquely striated. First joint of anterior tarsi 

 produced on the outside at apex, strongly emarginate at base on 

 inner side with a small tubercle near middle. Black; pronotum 

 except posterior margin ferruginous-red. Length 21 mm. 



Hah.— Swan River, W.A. Type in Brit. Mus. 



166. T. excavatus, n.sp. 



<J. Clypeus truncate anteriorly, apical angles pointed, punc- 

 tured, with fine thin pubescence, connected at base by a broad 



