160 xnrNNTD.i:. 



21 . Thynnus molestus. 



Mitlc. I>oiip:th 74 linos. — lUack, mnrkcHl witli yellow on the head, 

 and sparingly so on the al)doinon ; (he tibiio and tarsi ferruginous. 

 The mandibles, clypous, a lino from it that unites with a broad 

 line at the inner margin of tho eyes, as high as the antennae, a 

 minute spot above them, and a broad stripe behind tlie eyes, j-ellow. 

 Thorax closely punctured ; the wings subliyaline, the nervures 

 yellowish at the base of the wings. Abdomen shining, finely and 

 closely punctured ; a minute yellow macula at the lateral margins 

 of the second, third, and fourth segments. 



Jfah. South Australia. 



22. Thynnus strangiilatus. 



Male. Length 4 lines. — Shining black, the segments deeply con- 

 stricted. Head punctured ; the clypeus much produced, its anterior 

 margin truncate, its extreme lateral margins narrowly white; a 

 spot at the baso of the mandibles white. Thorax sparingly punc- 

 tured ; the wings hyaline and iridescent ; the anterior tibiae pale 

 inifo-testaceous. Abdomen shining and impunctate. 



Female. Ferruginous and shining ; the motathorax dark fuscous ; 

 the apex of the abdomen black ; the head compressed, smooth, and 

 shining, widest anteriorly. 



Hab. South Australia. 



23. Thynnus pavidus. 



31ale. Length 5 lines. — Black ; the head and thorax with yellow 

 markings ; the base of the antennae and the legs ferruginous. The 

 clypeus and mandibles reddish yellow ; the former, with the base 

 and two minute spots, black ; the tips of the mandibles black. 

 The margins of the prothorax yellow, the hinder margin broadly 

 80, and uniting with the anterior margin, which is slightly inter- 

 rupted in the middle ; the scutellum, postscutellum, and a narrow 

 line from the latter to the base of the posterior wings, yellow ; the 

 mcsothorax finely punctured ; the metathorax transversely striated 

 beyond the base, which is smooth and shining ; wings hyaline, the 

 nervures dark fuscous, becoming ferruginous towards their base ; 

 the coxae black. Abdomen shining black, impunctate, with the 

 margins of the segments depressed. 



Female. Black ; the head smooth and shining ; the mandibles, an- 

 tennae, legs, and second segment of the abdomen ferruginous, the 

 latter transversely grooved ; the apex of the abdomen ferruginous. 



Hab, South Australia. 



I 



