10. PEKGA. 21 



the whole apical half of the wing clouded with smoky yellow, 

 darkest at the line of demarcation, which forms an ill-defined band : 

 hind wings paler than the fore wings; apical half clouded with 

 brown. The first transverse nervule on the fore wings is marked 

 with a bulla, or is wholly obsolete ; and one or two other nervures 

 are also marked with bullae, which do not appear to be uniform. 

 A second specimen is rather smaller and lighter coloured. 



This species may be distinguished from P. polita by the different 

 colouring of the wings and by the concolorous scutellum. 



Hob. New South Wales. 



a. 2 • (Type of species.) Sydney. * Mr. Lambert. 



b. 2 . Sydney. 



6. Perga kirbii. 

 (Plate II. fig. 2.) 



Perga kirbii, Leach, Zool. Misc. iii. p. 117, n. 8 (1816) ; Westw. P. Z. S. 

 1880, p. 371, pi. xxxvii. fig. 4. 



Exp. al. 1 poll. 7 lin., long. corp. 11 lin. 



Head and thorax dull castaneous ; thorax with the frontal and 

 lateral ridges slightly raised, but distinct and grooved, darker than 

 the ground-colour ; tip of jaWs black. Abdomen reddish chestnut 

 above, shining. • Scutellum obscure testaceous, with a distinct longi- 

 tudinal groove in the centre. The whole undersurface of the body 

 testaceous. Wings hyaline ; costa, stigma, and nervures yellowish. 



Closely allied to P. Jclugii, but, independently of its different 

 colouring, the grooved scutellum and clear hyaline wings will at 

 once distinguish it, the scutellum in P. Tclugii having merely a 

 shallow depression in the middle. 



As the male only was previously known, I have described and 

 figured the female. Leach's type is in the Hope Museum at Oxford. 



Hab. Australia. 

 a. 2 • Swan River. Mr. Du Boulay. 



7. Perga polita. 

 (Plate II. fig. 1.) 



Perga polita, Leach, Zool Misc. iii. p. 115, n. 1, pi. 148. fig. 8 (1817) ; 

 Westw. P. Z. S. 1880, p. 363. 



Exp. al. 1 poll. 3 lin. ad 1 poll. 8 lin., long.' corp. 8-10 lin. 



Head testaceous above ; vertex reddish in the middle ; antennae, 

 labrum, and clypeus yellow ; jaws reddish, tipped with black. 

 Thorax reddish brown ; scapulae, collar, a Y-spot in the middle and 

 on each side above, and the pleura and the sides of the pectus 

 yellow. Scutellum smooth, yellow, bisected by a groove throughout 

 its whole length. Abdomen shining chestnut, mottled with blackish 



