BY W. \V. FROGGATT. 865 



■either side of the lower ocellus, two on each side of the vertex 

 behind the angle of the eye, with a fine fringe of bristles round 

 the hind margin of the eyes. Thorax : five on. each side of the 

 thorax, a row of three on either side of the dorsal surface, with 

 four in the centre, the lower pair reaching over the scutellum, 

 which is furnished with four long bristles. 



Dacus tryoni Frogg. The Gueensland Fruit-Fly, 



Some interesting points have been worked out in the life- 

 history of this species, through the experimental work carried 

 out by Mr. W. B. Gurney at Narara. While non-existent,, last 

 season, in the orchard-fruits, a great number of the indigenous, 

 succulent-fruited scrub-trees, sucli as the Black App\e(Sideroxylon 

 {Achras) australe), the C\ie,e^Q\w ood{Acronychia Icevis), and the 

 White A.^\\{Schizomeria ovata) were found to have their fruits 

 badly infested with the larvae of this fruit-fly. These trees were 

 often growing in belts of scrub along the gullies adjacent to the 

 orchards, yet the fruit-flies did not spread away from the indi- 

 genous fruits. This tends to show that this fruit-fly is a native 

 of the coastal districts of New South Wales as well as Queens- 

 land, ranging as far south as Gosford, fifty miles north of Sydney; 

 but it is confined to the rich brush-lands upon which these 

 succulent-fruited, forest-trees and shrubs grow. 



A small, red, braconid parasite, closely allied to a braconid 

 ■wa,s^(Cratospila rudibtuida), the parasite of the Mexican fruit- 

 fly, Tj'i/peia ludejis, has been Vjred from the fly-larvae infesting 

 these wild fruits : and, as might be expected, tlie smaller fruits 

 have yielded the larger per centage of parasites. In the case of 

 the small White Ash berries, 50 per cent, of the fly -pupae collected 

 contained parasites. Though there appears to be little hope 

 that these parasites will be of any commercial value in destroying 

 the Mediterranean fruit-fly, in such fruits as oranges and peaches, 

 it may be valuable in dealing with the olive-fly of Italy; and we 

 propose, this coming season, to ship quantities to that country, 

 for experiments in this direction. 



