HYMENOPTERA. 39 



margins of the prothorax, an ovate spot on the scutellum, and 

 the post-scutellum, yellow ; the fasciae on the prothorax slightly 

 interrupted ; wings hyaline, faintly yellowish. Abdomen : a 

 pale yellow ovate spot on each side of the . second, third, and 

 fourth segments. 



Female. Length 3 lines. — Brown-black : the head smooth and 

 shining, with a few scattered punctures ; the thorax and abdomen 

 finely rugose, the basal margins of the segments of the abdomen 

 finely striated ; the second segment with four deep transverse 

 grooves ; the apical margins of the segments narrowly, and the 

 apical segment entirely, rufo-testaceous ; the face anteriorly, the 

 antennae, mandibles, and legs rufo-testaceous. 



Hab. Australia (Lower Plenty). (Coll. R. Bakewell, Esq.) 



102. Thynnus (Agriomyia) Ichneumoniformis. 



Male. Length 4\ lines. — Head, thorax, and extreme base of 

 the abdomen black ; legs and abdomen ferruginous ; the coxae 

 black, the trochanters more or less black ; the anterior margin of 

 the face and clypeus, uniting with a triangular spot on the latter, 

 and the mandibles, yellow ; sometimes the margins of the face 

 and clypeus are black ; two oblique yellow spots between the 

 antenna?, an interrupted line on the collar, and a curved line 

 before the tegulae, yellow. The wings hyaline, the nervures 

 brown ; the apical segments of the abdomen sometimes with 

 blackish stains, the apex rounded ; beneath, the apical segment 

 is narrowed and ciliated. 



Hab. Australia (Lower Plenty). (Coll. R. Bakewell, Esq.) 



103. Thynnus (Agriomyia) brevicornis. 



Male. Length 3^-5 lines. — Black, slightly shining, and punc- 

 tured : the antennae shorter than the head and thorax ; thinly 

 clothed with cinereous pubescence ; the thorax rather strongly 

 punctured above, the metathorax rugose, with the base very 

 delicately rugose ; the wings hyaline and iridescent, the nervures 

 testaceous. Abdomen : the margins of the segments depressed, 

 each segment with a raised curved shape on each side, which is 

 impunctate or slightly punctured ; beneath, strongly punctured, 

 the terminal segment rounded at its apex, which is ciliated, with 

 short rigid hairs. 



Hab. Australia (Lower Plenty). (Coll. R. Bakewell, Esq.) 



104. Thynnus (Agriomyia) monilicornis. 



Male. Length 4-4^ lines. — Black, slightly shining : head and 

 thorax closely punctured, thinly covered with cinereous glittering 



