EEPORT ON ECONOMIC ENTOMOLOGY 



95 



The transparent wings are dark brown along the costa, and there is a dark brown vein 

 below, as shown in the figure (Fig. 5-4). 



The chaetotactic characters are very marked, there being four bhick bristles on the head 

 four on the front of the thorax, two on each side of the median suture, one behind the root 

 of the wings, and two long ones on the scntellnm. The whole abdomen has tine, pale, 

 backwardly-projecting bristle-like hairs. 

 Length. 10-5 mm. 



The lavva- (Fig. 55, a) are creamy white, and 11 mm. long. They taper to a point at 

 the head end and are bluntly truncated posteriorly. The mouth parts consist of two curved 

 black mandibles (.\5). The truncated apex carries two spiracles, as shown in the figure. 

 The puparium (b) is 6 mm. long, deep brown, and elongated oval in form. 



The life-history is probably as in the closely- 

 related D. tyroni and other species. The female, 

 by means of her pointed ovipositor, lays her eggs 

 in the skin of the young melons. 



The larvffi on hatching tunnel into the fruit, 

 and so cause it to decay. When mature they 

 leave the fruit and pupate around it, either 

 beneath leaves or in the earth. 



These pests are easily distributed in cases of 

 fruit, when the larvte are found pupating in the 

 paper and other packing in the cases, and in the 

 cases themselves. 



Infested imported fruits showing any signs of 

 fruit-fly attack should at once be condemned. 



There can, of course, be no remedy for this 

 kind of attack. At present all that can be done 

 to protect fruit from fruit-fly attack is to net the 

 fruit in fine muslin bags. 



Lighter markings of head and thorax, vermilion, except VarioUS Uietliods of attracting the flieS with 

 large median square spot on thorax, which is yellow ; lighter 



parts of basal portion of wings vermilion ; membranous apical g^eet aud DoisOnOUS baitS haVC prOVcd of UO 



portion brown, with median yellow spot ; tegs and dark ^ ^ 



markings on body black j^^^;i ^j] ^iscased frults should at oucc be 



V vermilion ; v yellow ; b brown : s yellowish spot 



burnt. 

 Froggatt and others have confuseil the genera Dacux and TcjiJirilis, and erroneously 

 described the Queensland Fruit Fly under the latter genus. 



Fig. 56. —Dura plant bug 



The Dur.\ Pl.\nt Bug 

 {Ly(ji:viix iiiilit(iri.<:, Fabricius) 



This large brilliant Hemipteron has been found to do much damage to dura in the Lygasus 

 Sudan. The piercing apparatus punctures the plant and thus the insect draws out the sap. 



Very many of these land bugs occur ami often do much damage to cotton in Africa and 

 America as well as to other plants, especially those belonging to the genera Oxycarenus 

 and Dysdercus. 



The same insect has been sent me by Jfr. Willcocks from the Cairo ilistrict where it 

 seems to feed upon a number of plants. 



