58 Orthorrhapha bracliycera. 



Male. Eves bare, facets in the upper two thirds riuicli larger 

 than below, the dividiiig line sharp: tiie colour greenisli witli a purplisli 

 band on the dividing line and small, round, purplish spots spread 

 irregnlarly and unsymetricaiiy on the eyes. Front and face black witli 

 some golden or wliitish pubescence: mouth edge on the sides yellowish 

 or brownish; face knob-like protruding below the antennæ. Anlennæ 

 blackish or yellowish brown, often with the basal joints lighter, the 

 Iwo basal joints of equal length. Thorax blackish with fine, golden, 

 sometimes more greyish, pubescence. Scuteilum blackish with yellow 

 spines. Abdomen green or yellowish green with a black. longitudinal 

 middle band, which is broadest on the fourtli segment. Venter green 

 or yellowish green. Abdomen short and finely, yellowish pubescent. 

 Legs yellow except tlie blackish coxæ. with short and fine yellow 



Fig. '23. Wing of H. riridnla. 



pubescence, only a little longer on the anterior femora. Wings hyaline 

 with the anterior veins very slightly yellowish. the radial vein absent. 

 the cubital vein not forked, the first of the veins rising from the discai 

 cell rudimentary, the third absent. Halteres yellow to green. 



Female. Eyes coloured as in the male. but the purplish band 

 in the middle. Front and face black with golden pubescence. leaving 

 some elevated spots bare, especially one on eaeh side between the 

 eye and the base of the antenna and one farther above. Hinder eye- 

 margin black with dense golden pubescence. Thorax with dense. 

 depressed, golden or pale golden pubescence. The black dorsal band 

 on abdomen widened both on the third and fourth segments and 

 generally more widened than in the male. 



Length (i to nearly 8 mm. 



The larva is lighter or darker brownish with different longitudinal 

 stripes or markings; on the dorsal side it is rather densely haired 

 with short, depressed hairs, on the ventral side the middle space of 

 the segments have somewhat longish hairs. The length is IG mm. 



This species niay vary somewhat with regard to tiie breadth of 

 the dorsal abdominal band, but all the specimens I have seen from 

 Denmark belong to thf variety viridula with an uninterrupted dorsal 

 band; the other varieties, varying with regard to the dorsal band. 

 which is sometimes quito absent. or only a basal spot present, or 



