DIPTERA. 



369 



the same way. The larvae are much the same as in the Cecids, 

 having the same peculiar reddish hue and curious 'breast-bone.'" 



The larvae live in excrescences on the stems of various Rubi, and 

 metamorphose in the galls. They appear in May. 



Imago. — Brownish-black ; antennae of ,t black, shorter than tlic 



Fig. 341.— Asphoiulylia sarothamni. 



Fig. Zi%—Fwpa 

 0/ Asphondylia 

 sarothamni. 



head, 22 -jointed. Palpi white; head white and brown. Tliorax 

 deep black with a silvery white band around the edge in front, with 

 two pinkish or golden stripes partly along the top ; seen in certain 

 lights, in others the centre of 

 the thorax is black ; scutellum 

 tawny. Abdomen black, with 

 four silvery bands slightly 

 broken in the middle. Ab- 

 domen and (J genitalia covered 

 by white hairs. Legs also cov- 

 ered by silvery hairs and scales. 

 Wings clear ; costa thick and 

 dark, in the middle a white 

 spot ; root of costa also pale. 

 ^ resembles cJ, only the 

 antennae are 24-jointed. Ovi- 

 positor yellowish-white ; long ; 

 no lamellae. There are beau- 

 tiful scales on the venter of the abdomen as well as the legs. After 

 death the colours turn browner, and the white hairs less silvery. 

 2 a 



Fig. ZiZ.—Gnll on stem ofbrmnUe caused 

 Lasioptera rubi. 



