28 TENTHREDINID2E. 



black, second testaceous, bordered behind with black. Undersnrface 

 rather darker. Wings hyaline, with a slight j^ellowish tinge ; costa, 

 stigma, and nervnres yellowish brown ; costa very strongly arched, 

 as in most species of this section, the first three snbmarginal cells 

 are small, and the last very large. 



Hab. West Australia. 



a. S • (Type of species.) Swan Kiver. Purchased. 



b. $ . Swan River. Dr. Bacon. 



38. Perga brullei. 

 Perga brullei, Westw. P. Z. S. 1880, p. 364, pi. xxxiv. fig. 6. 

 Hab. South Australia ; Queensland. 

 a. $ . Moreton Bay. Mr. Diggles. 



39. Perga dahlbomii. 



Perga dahlbomii, Westw. P. Z. S. 1880, p. 371, pi. xxxv. figs. 3, 4. 



Hab. West Australia. 



a. $ . Australia. Purchased. 



b, c. 2' Swan River. Mr. Du. Boulay. 



d. 2 • Swan River. Dr. Bacon. 



e. cJ. 



Section iii. 

 Antennce 7-jointed, ivith a gradually-formed club. 



40. Perga amenaida. 

 (Plate IT. fig. 10.) 



Exp. al. 9 lin., long, corp. 5 lin. 



Head and thorax black above, sparingly punctured ; face, cheeks, 

 two spots on the vertex, two at the base of the antennae, and two be- 

 tween these and the eyes yellowish ; mandibles tipped with black ; 

 antennae reddish. Thorax with a slight depression on each side and 

 a groove in front, between a yellowish V-spot ; the back of the 

 scapulse, the sides of the thorax, and the scutellum are also yellow. 

 Legs and the centre of the pectus testaceous ; the rest of the under- 

 surface of the body whitish. Abdomen steel-blue, with a slight 

 greenish shade. Scutellum deeply cleft, and almost divided in two ; 

 hind femora dilated. Wings hyaline, with yellow nervures and 

 costa ; the costal half of the fore wings yellowish. 



Hab. South Australia. 

 a. 3 . (Type of species.) Adelaide. Purchased. 



