86 



Specimens of the larva have been found under a log at Fern 

 Tree Gully, by Mr. F. P. Spry, who succeeded in breeding a 

 specimen. The pupa-case resembles that of Pachygaster very 

 closely. The empty case consists of ten segments, the head, and 

 apparently first segment, being missing; it is flat, black, and 

 bears yellow bristles, second and third segments each with six 

 dorsal bristles, fourth to ninth each with four dorsal bristles, 

 tenth and eleventh each with two dorsal bristles; in addition, 

 each segment bears a pair of lateral bristles on each side, and 

 the last segment also a pair of unusually long, converging 

 bristles. 



G. purpiiratus is, at present, known to occur only in Victoria, 

 where several specimens have been obtained. One of these wall 

 be found in the collection of the Melbourne Museum. 



12. Elissoma, gen.nov. 



Slender, brightly coloured, but not metallic flies. Antennae 

 extremely long and slender, about five times the length of head; 

 scutellum with two spines; abdomen twice as long as broad, 

 narrow at the base, and broadening posteriorly, with a rounded 

 apex; legs long and slender; wings large, cubital vein forked, 

 fourth, posterior vein arising from the junction of the discal cell 

 and second, basal cell. 



Head slightly broader than the front of the thorax. Antennse 

 extremely long and slender, about five times the length of the 

 head, first two joints short, first about twice the length of second, 

 third about four and one-half times the length of first and second 

 together; the three joints are of almost equal breadth, but the 

 short, second joint is slightly the broadest; the third joint in its 

 basal portion, for a length slightly exceeding the first and second 

 joints together, is apparently without annulations, then come 

 four or five, obscure, closely approximated annulations, after 

 which the remainder of the third joint, amounting to about 

 two-thirds of its complete length, is without annulations. Eyes 

 bare, touching, in the male, at a point a short way above the 

 antennse. Vertex with an elevated, scutellar tubercle. Head 

 connected with the thorax by a distinct neck. Thorax almost 



