18 HYMENOPTERA. 



26. Thynnus flavilabris. B.M. 



Thynnus flavilabris, Guer. Mag. Zool. (1842) Mon. Thynn. p. 8. 

 Thynnus morio, MacLeay, MS. ? 



Hab. Australia. 



27. Thynnus fenestratus. B.M. 



Male. Length 12 lines. — Black : the abdomen shining, with 

 a nigro-seneous tinge ; the palpi, labrum, clypeus and mandibles 

 orange-red, the tips of the latter black ; the orange colour runs 

 from the clypeus on each side along the anterior margin of the 

 face to the base of the mandibles ; the head and thorax with a 

 dense griseous pubescence, which is obliterated on the disk of 

 the latter, but thick and woolly on the metathorax ; wings dark 

 brown with a violet reflexion, their base hyaline. The abdomen 

 with scattered punctures, and an impressed transverse line near 

 the basal margin of the first, second, and third segments ; the 

 apical segment longitudinally rugose, the inferior ventral plate 

 terminating in a barbed spine. 



Hab. Australia (Swan River). 



28. Thynnus gravidus. 



Thynnus gravidus, Westw. Arc. Ent. ii. 141. 

 Thynnus Klugii, Westw. $ ? 



Hab. Australia. 



29. Thynnus purpureipennis. 



Thynnus purpureipennis, Westw. Arc. Ent. ii. 143. pi. 83. f . 1 $ . 

 Hab. Australia. 



30. Thynnus decipiens. 



Thynnus decipiens, Westw. Arc. Ent. ii. 105 (note). 124 S . 

 Hab. Tasmania. 



31. Thynnus Olivieri. 



Thynnus Olivieri, Erichs. Wiegm. Arch. (1842) p. 263. 235 $ . 

 Westw. Arc. Ent. ii. 146. 



Hab. Tasmania. 



32. Thynnus fervidus. 



Thynnus fervidus, Erichs. Wiegm. Arch. (1842) 262. 236 $ . 

 Westw. Arc. Ent. ii. 146. 



Hab. Tasmania. 



