36 HYMENOPTERA. 



with the base and apical portion more or less fuscous, the extreme 

 apex pale, the apical margins of the second, third, and fourth 

 segments fuscous ; a yellowish- white spot at the extreme lateral 

 margin of each segment. 



Hab. Australia. 



93. THYNNUS (AGRIOMYIA) MCESTUS. 



Male. Length 6| lines. Black : the head and thorax closely 

 punctured, the legs red, the abdomen with a number of glaucous 

 spots. The anterior margin of the clypeus yellowish-white ; the 

 mandibles ferruginous, their apex bidentate. Thorax : the pro- 

 thorax with a narrow pale testaceous margin in front, the post- 

 scutellum pale testaceous; wings fusco-hyaline, their nervures 

 dark ferruginous. Abdomen shining, and having a number of 

 transverse punctures, the apical portion of each segment smooth 

 and impunctate; the second, third, fourth, and fifth segments 

 with two central and one lateral irregularly- shaped glaucous 

 spots ; beneath, the second and two following segments with a 

 central transverse spot. 



Female. Length 4 lines. Black : head and legs ferruginous ; 

 thorax punctured ; the basal segment of the abdomen punctured, 

 the second with four deep transverse grooves. 



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



94. THYNNUS (AGRIOMYIA) PETIOLATUS. 



Male. Length 4 J lines. Black : the head and thorax covered 

 with strong confluent punctures; antennae orange-red; wings 

 hyaline, with their apical margins faintly clouded, the nervures 

 dark fuscous ; the intermediate and posterior tibiae serrated ex- 

 teriorly. Abdomen ovate, smooth and shining, the basal seg- 

 ment forming a short petiole at its base. 



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







95. THYNNUS (AGRIOMYIA) LUCIDUS. 



Male. Length 4 \ lines. Jet-black and shining : the mandi- 

 bles and legs pale ferruginous ; the clypeus elevated, carinate in 

 the middle and bidentate at the apex. The head and thorax with 

 shallow punctures ; the metathorax smooth and shining, its trun- 

 cation rugose; the wings hyaline and iridescent, the nervures 

 ferruginous. Abdomen smooth and shining, very delicately 

 punctured, the margins of the segments slightly depressed. 



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



