Exorista. 



315 



Male. Froiis above somewhat more than half as broad as the 

 eye, a little protruding; orbits at most as broad as frontal stripe; 

 cheeks rather narrowing downwards. Orbits grey, blackish above; 

 cheeks silvery; jowls narrow, whitish grey; frontal stripe velvet 

 brown to blackish. Frontal bristles descending to end of second 

 antennal joint or a little below; only the uppermost reclinate. Vibrissæ 

 scarcely ascending. Orbits and jowls black-haired. Occiput grey, 

 silvery along the eye-margin, with whitish hairs and a row of black 

 hairs behind postocular bristles. Eyes with short pale hairs. An- 

 tennæ black, third joint about four times as long as second, but 

 somewhat varying in this respect; arista long, thickened in about 

 basal half, second joint distinct, but not elongated. Palpi yellow, 

 darkened on basal part. Thorax bluish black, thinly bluish grey 

 pruinose, but distinctly grey at the sides, with four black, not very 

 distinct stripes, two narrow median, diverging and abbreviated 

 behind, and two lateral, interrupted at the suture; scutellum with 

 apical half brownish red. Thorax black-haired; four post- 

 sutural dorsocentrals. Scutellum with four marginal 

 bristles on each side, the apical crossing. Three sterno- 

 pleural bristles. Abdomen conically ovate, black and 

 shining, generally with a small red side spot on third 

 segment; third, fourth and fifth segment whitish prui- 

 nose, shifting with dark tessellations according to view, 

 the hind margins and a middle stripe black, Abdomen 

 black-haired, with marginal bristles, a pair on second 

 and third and a row on fourth segment; a pair of weak 

 and indistinct discai bristles may be present on third and 

 fourth segment. Fifth sternite cleft about to base; upper 

 forceps robust, cleft into two arms in apical half, obtuse 

 at end; the basal half hairy, the rest bare; arms of lower 

 forceps much more slender and pointed, of about the 

 same length as upper forceps. Legs black; hind tibiæ 

 with a somewhat dense anterodorsal row of rather equal 

 bristles, with a strong bristle in the middle; claws and 

 pulvilli strongly elongated. Wings nearly clear; veins 

 blackish; first posterior cell ending somewhat near apex 

 of wing; discai angle a little obtuse; apical cross- vein 

 almost straight; posterior cross-vein slightly doubly curved or 

 nearly straight. Squamulæ white. H alteres brown. 



Female. Similar; frons as broad as the eye. 



Fig. 76. 

 E. hortu- 

 lana ^ , 

 hind tibiæ 

 with 

 antero- 

 dorsal 

 bristles. 



