40 HYMENOPTERA. 



pubescence ; the joints of the antennae arcuate, or rather, much 

 produced at their base beneath. Thorax : the wings hyaUne, 

 faintly tinted towards their apex, the nervures black. Abdomen 

 much narrowed at the base, subpetiolate, the basal segment with 

 a central impressed line ; the apical appendage narrowed at the 

 base, and with an angular tooth in the middle of its apical 

 margin. 



Female. Length 2 lines. — Head, thorax, legs, and base of the 

 abdomen rufo-testaceous ; head and thorax sparingly punctured, 

 the truncation of the metathorax smooth and shining ; the second 

 segment of the abdomen transversely rugose; the third, fourth, 

 and fifth segments fusco-ferruginous, and thinly sprinkled with 

 short cinereous hairs ; the apex pale testaceous. 



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



105. Thynnus (Agriomyia) calcaratus. 



Male. Length 4 lines. — Black : head and thorax closely 

 punctured and subopake, the base of the metathorax and the 

 abdomen smooth and shining ; the mandibles and anterior margin 

 of the ch^peus and face pale yellow; the head, thorax beneath 

 and on the sides with long cinereous pubescence ; the wings 

 hyaline, with a brilliant iridescence ; the tibia;, tarsi, and tips of 

 the femora ferruginous; the posterior femora with a blunt tooth 

 in the middle beneath. 



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



106. Thynnus (Lophocheilus) villosus. 



Lophocheilus villosus, Gu^r. Mag. Zool. {1842); Mon. Thynn. 

 12. pi. 103. 



Hab. Australia. 



107. Thynnus (Lophocheilus) distinctus. 



Lophocheilus distinctus, GweV. Mag. Zool. (1842); Mon. Thynn. 

 12. pi. 10.3. 



Hab. Australia. 



108. Thynnus (Lophocheilus) collaris. 

 Lophocheilus collaris, Guer.Mag. Zool. (1842); Mon. Thynn. 13. 

 Hab. Australia. 



109. Thynnus (Enteles) bicolor. 



Thynnus (Enteles) bicolor, Westw. Arc. Ent. ii. 1 44. pi. 82. f . 4 ? . 

 Hab. Australia (King George's Sound). 



