HYMENOPTERA. 37 



96. THYNNUS (AGRIOMYIA) MAURUS. 



Male!* Length 10 lines. Black : head and thorax finely 

 punctured, the punctures distant on the vertex, disk of the meso- 

 thorax, and on the scutellum ; the clypeus convex, its anterior 

 margin truncate ; the cheeks, thorax on the sides and beneath 

 covered with cinereous pubescence ; the legs have also a cinereous 

 pubescence ; the wings dark brown, with a bright purple irides- 

 cence ; the apex of the anterior wings pale. Abdomen smooth 

 and shining, and having a few distant minute punctures ; the 

 margins of the segments depressed, and with a transverse im- 

 pressed line at the base of each segment ; the apical segment 

 above rounded, the ventral plate somewhat triangular, with a 

 minute tooth at the apex; the sixth ventral segment with a 

 tooth at each posterior lateral angle. 



Hab. Australia. (Coll. W. W, Saunders, Esq.) 



97. THYNNUS (AGRIOMYIA) CRABRONIFORMIS. 



Male. Length 4 lines. Black, with yellow bands on the 

 abdomen ; the mandibles and clypeus yellow ; the antennae 

 ferruginous beneath. Thorax : two oblique lines on the pro- 

 thorax, a spot on the tegulae, a minute one on the scutellum and 

 the post-scutellum, yellow; wings hyaline, with the nervures 

 rufo-testaceous ; the tibiae, tarsi, and tips of the femora rufo- 

 testaceous, the posterior tarsi yellow, the apical joint ferruginous. 

 Abdomen : the second, fifth, sixth, and seventh segments yellow. 



Hab. Australia. (Coll. W. W. Saunders, Esq.) 



98. THYNNUS (AGRIOMYIA) ANILITATIS. 



Male. Length 6| lines. Black : head and thorax covered 

 with long pubescence, that on the head above and on the disk 

 of the thorax slightly fulvous ; on the cheeks, thorax beneath, 

 and on the metathorax and legs it is cinereous ; the clypeus with 

 a central longitudinal carina ; the mandibles yellow. The wings 

 hyaline or faintly yellowish, the nervures brown, the stigma 

 black ; the tibiae with their calcaria white, the claws of the tarsi 

 ferruginous. Abdomen subpetiolate, the margins of the segments 

 depressed, sparingly pubescent above, more thickly so beneath. 



Female. Length 4J lines. Black : the head smooth, shining, 

 and delicately and distantly punctured. Thorax finely rugose, 

 metathorax obliquely truncate ; the articulations of the legs and 

 the spines of the tarsi ferruginous. Abdomen : the basal seg- 

 ment rugose, with a transverse carina near its apex ; the second 

 segment with a transverse carina at the base and apex, with the 

 intervening space coarsely rugose ; the following segment rugose, 



