670 NOTES ON AUSTRAMAN SAWFLIES, 



remain from two to three months, wlien the pupa undergoes a 

 second transformation. A fine, almost black, soft but closely 

 felted, fibrous, inner cocoon is spun, within which the pupa, 

 now an elongate, very wrinkled, white creature, without an}' 

 outlines of head or appendages, is enclosed. There must be a 

 third change, when the typical, true pupa develops, but this has 

 not yet been w^orked out. Probably, like some moths, this will 

 not take place until a month or two before the emergence of the 

 perfect sawfly. 



Pterygophorus bifasciatus Brulle. 



Hist. Nat. Insect., Hymen., Vol.iv., p.660, PI. 46, fig.l, 9, 1846. 



This handsome species is easily distinguished from all the other 

 species by the dark marking on the forewings. The type, a 

 female, was described from Tasmania. Mr. Rowland Turner 

 informs me that it was unique; he had never seen this insect 

 until I sent specimens to the British Museum. My specimens 

 were collected in the pupal state: a colony, containing about 

 twenty cocoons imbedded in soft wood from the stem of an un- 

 determined tree, was sent by Mr„ Harold Brooks, from Dungay, 

 Tweed River, N.S.W. The larvie, when received in the cocoons, 

 were in a semi-pupal state, but showed that they were typical of 

 the genus Pterygophorus. The perfect sawflies emerged from 

 the cocoons early in September. 



X. Shining blue-black, variegated with dull yellow. Length, 

 }. : exp. wings, | inch. Head and thorax, with the exception of 

 a yellow blotch on the sides of the latter, shining dark blue. 

 Legs black, variegated on the tarsi. Basal half of the dorsal 

 surface of the abdominal segments black, with the whole of the 

 ventral surface and apical portion of the dorsal surface yellow. 

 Forewings hyaline, richly variegated with chocolate-brown, form- 

 ing a clouded costal nervure; hind and marginal band, and an 

 outer transverse baud crossing the centre of the wing, so that 

 there are three semiopaque areas on the basal half of the wing 

 enclosed in clouded bands. Hindwings slightly fuscous. 



9. Larger than ^J; of the same shining blue-black colour, but 

 having the face, a large blotch on the shouldeis, scutellum, post- 



