114 



The maggots of this fly were on several occasions obtained from condemned 

 bananas coining in shipments of fruit from the New Hebrides. The maggots 

 are easily distinguished from the Queensland species by the different colour 

 and for. n of the anal respiratory tubes, which are black and small at the 

 orifice. The fully-developed maggot is larger, and of a darker colour, the 

 pupse lighter yellow, and somewhat more rounded in form. 



Within i he last few years this species has been introduced into Queens- 

 land, where it is quite common in cultivated fruit ; and last year (1908) Mr. 

 Gurnpy bred quite a number in the Gosford district from various fruits. 



It is allied to Trypeta bicolor, Macq., a species peculiar to Australia, and 

 which I have collected on the wing in the Bathurst district, New South 

 Wales ; but it is a much lighter-coloured fly, with the wings more lightly 

 clouded. 



This fly measures three lines in length, and has a wing expanse of six 

 lines. The head is small, ochreous, with dark eyes, and the whole of the 

 upper surface covered with stout, black bristles, which extend over the dorsal 

 surface of the thorax; the antennae yell *w, with a long bristle standing out 

 from the apex of the second joint, the terminal joint short and rounded. 

 'The thorax is brownish yellow, rounded in front, broad to the base of the 

 wings, and sloping round to the scutellum, which is rounded in front, pro- 

 duced into a spine on either side of the hind margin. The legs lightish- 

 brown, with the tarsal spines, claws, and tibial spines of the hind legs black. 

 Wings hyaline at base, with all the upper half black to dark brown, with an 

 irregular hyaline blotch on the costal nervure extending to the subcostal cell ; 

 two small, rounded, hyaline spots on each side below, and mottle-brown 

 clouding in the lower cells. The abdomen is small, light brown at base, 

 black on the apical half, covered with coarse hairs. 

 . Habitat New Hebrides, Queensland, and New South Wales. 



NOTE. Through the experiments carried out at Narara by Mr. Gurriey it 

 has been discovered that this fly breeds in the native fruits in that district, 

 and is particularly abundant in the " Black Apple " (Achris australe). 

 Within the last month (February) I have bred it from the same wild fruit 

 collected at Thiirjul, south of Sydney, so that it has a wide range along the 

 coast. It is also very doubtful if this species ever puncturt s perfectly sound 

 orchard fruit. All the evidence gained by Mr. Gurney and myself after 

 close observation in the orchard for th^ last six months, tends to the conclu- 

 sion that unless a fruit has a bruise, blemish, or has been previously 

 punctured by s(*me other insect, it is not touched by the Island Fruit-fly. 



The Apple Maggot. 



(PI. VIII, figs. 1, 2, and 3.) 



Rhagofetet (Trypeta) pomonella, Walsh. 



(American Journal of Horticulture, December, 1867, p. -338.) 

 This is a well-known apple pest in the eastern portion of the United 

 States and Canada wherever apples are grown, and among the orchardists is 

 popularly known as the " Railroad Worm," on account of the regular winding 

 tracks it makes when eating its way through the tissue of the infested apple. 

 It is a native of North America, and its original food was the wild haws, 

 and, probably, crab apples, so that the cultivated apple is an acquired habit, 



