12 HYMENOPTERA. 



Male. Length 9^ lines. Black: the mandibles, labrum, 

 clypeus, orbits of the eyes interrupted at their summit, and a 

 V-shaped mark at the base of the antennae, yellow ; the scape 

 yellow in front ; the flagellum ferruginous, slightly fuscous above; 

 the tips of the mandibles black ; the anterior margin of the cly- 

 peus rounded, and a short stout tooth at its lateral angles. The 

 anterior and posterior margins of the prothorax yellow; the 

 scutellum and metathorax yellow, the former fuscous at its base ; 

 the wings hyaline, with their extreme base brown ; the legs fer- 

 ruginous, the tarsi fuscous. Abdomen : the truncation of the 

 base and half the superior surface of the first segment yellow ; 

 two large ovate spots on the second segment, two smaller ones 

 on the third, and two minute oblique ones on the fourth seg- 

 ment, yellow ; the sixth segment with a tooth at its lateral basal 

 margins ; the seventh deeply emarginate above, the lower ven- 

 tral plate terminating in an acute spine, which has a short tooth 

 on each side at its base, and another longer tooth on the lateral 

 margins. 



. This species is apparently unique in the Banksian Collection. 



2. THYNNUS VARIABILIS. Plate III. fig. 1 $ . B.M. 

 Myzine aptera, Oliv. Enuycl. Meth. viii. 137. 7 ? 



Thynnus variabilis, Kirby, Trans. Linn. Soc. xii. 476 $ 



Guer. Voy. Coq. Zool. ii. 223; Mag. Zool. (1842) pi. 101. 



fig. 1-20. 

 King, Eerl Abhandl. (1842) 16. 4. f. 1 $ , 2 ? . 



Thynnus apterus, Gutter. Voy. Coq. Zool. ii. 230 ? . 



Thynnus flavo-guttatus, Guer. Voy. Coq. Zool. ii. 230 J . 



Myrmecodes flavo-guttatus, Latr. Nouv. Diet. d'Hist. Nat. 

 2nd ed. xxii. p. 143 ? . 



Thynnus Olivieri, Erichs. Wiegm. Arch. (1842) p. 262. 235 ? . 

 Westw. Arc. Ent. ii. 146. 



Hab. Australia; Tasmania. 



3. THYNNUS ZONATUS. 



Thynnus zonatus, Guer. Voy. Coq. Zool. ii. 222. 



King, Eerl. Abhandl. (1842) 15. 2. 

 Hab. Australia. 



4. THYNNUS AFFINIS. B.M. 

 Thynnus affinis, Guer. Voy. Coq. Zool. ii. 226 <? . 



Klug, Eerl. Abhandl. (1842) 18. 7. 

 Hab. Australia (King George's Sound). 



