12 HYMENOPTERA. 



Male. Length 9^ lines. — Black : the mandibles, labram, 

 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. !(?. B.M. 

 Myzine aptera, Oliv. Envycl. Meth. viii. 137. 7 ? • 



Thynnus variabilis, Kirby, Trans. Linn. Soc. xii. 476 S ? . 



Chier. Voy. Coq. Zool. u. 223; Mag. Zool. (1842) pi. 101. 

 fig. 1-20. 



King, Berl. Abhandl. (1842) 16. 4. f. 1 ^, 2 ? . 

 Thynnus apterus, Guer. Voy. Coq. Zool. ii. 230 $ . 

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

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



2nd ed. xxii. p. 143 $ . 

 Thynnus Olivieri, Erichs. Wiegm. Arch. {1842) p. 262.235^ ? . 



fVestw. Arc. Ent. ii. 146. 

 Hab. Australia ; Tasmania. 



3. Thynnus zonatus. 



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

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



Hab. Australia. 



4. Thynnus affinis. B.M. 



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



King, Berl. Abhandl. (1842) 18. 7- 

 Hab. Australia (King George's Sound). 



