HYMENOPTERA. 45 



the head and thorax strongest; thorax strangulated in the 

 middle ; the metathorax oblique. 



Hab. Australia. 



128. Thynnus flavofasciatus. B.M. 



Female. Length A-\ lines. — Head and thorax rufo-ferruginous ; 

 the head posteriorly, the thorax in front, and two large oblique 

 maculae on the metathorax, yellow ; the tibiae serrated exteriorly ; 

 the abdomen dark ferruginous, with five broad yellow bands, 

 the second and third narrowest, and the apical one slightly inter- 

 rupted in the middle. 



Hab. Australia (Swan River). 



129. Thynnus trisulcatus. B.M. 



Female. Length 3 lines. — Black : head and thorax strongly 

 punctured ; antennae and mandibles ferruginous ; legs rufo- 

 piceous, with the tarsi paler; thorax transverse in front, pro- 

 duced into a neck, deeply strangulated in the middle ; meta- 

 thorax narrow at the base, rounded and widened at the apex ; 

 abdomen with shallow punctures, the second segment with three 

 transverse deep furrows. 



Hab. Australia. 



130. Thynnus LiEviFRONS. B.M. 



Female. Length 4 lines. — Nigro-piceous : head compressed, 

 very smooth and shining; flagellum fulvous beneath ; mandibles 

 rufo-testaceous ; the anterior margin of the thorax rounded, 

 notched in the middle, the notch continued into an abbreviated 

 channel ; the metathorax oblique, narrowed at the base ; abdo- 

 men with fine shallow punctures, the second segment with four 

 deep transverse furrows. 



Hab. Australia. 



131. Thynnus connectens. B.M. 



Female. Length 5| lines. — Dark rufo-fuscous : the head 

 rufo-testaceous, smooth and shining ; the metathorax obliquely 

 truncate ; an irregular narrow transverse band on the first seg- 

 ment of the abdomen, a spot on each side of the second, the 

 three following with broad bands slightly interrupted, the bands 

 with a minute ferruginous spot laterally ; the apical segment 

 longitudinally striated. 



Hab. West Australia. 



