The Scottish Naturalist. 67 



divergent rough processes, each of which is surmounted by a 

 plate which is separated into three divisions ; a depression be- 

 hind these, succeeded by a rugulose ridge, posterior to which 

 there is a longitudinal depression, that intersects four slight 

 elevations, of which the two uppermost are placed apart. 

 Length 2 lines. 



The fly is the Anthomyia mitis of Meigen, Europ. Zweif. Ins. 

 v. 183, 173. Pegomyia mitis, Macquart, Hist. Ins. Dipt. (Suites 

 a Buffon) ii. 351, 2. The male has the face of a shining silky 

 white, viewed in front, but ferruginous when looked at laterally ; 

 the frontal band ferruginous, two shining white spots above the 

 antennae ; margins of the eyes narrowly silken white, eyelet 

 triangle, black with grey reflections, bearing a few black hairs, 

 as do the sides of the frontal band, the borders of the mouth, 

 and the hinder rim of the head ; eyes nearly meeting above, 

 reddish-brown, or brown, naked ; antennae, with the two basal 

 joints ferruginous, the third oblong, black ; the seta naked, 

 black ; trunk ferruginous, darker along the middle ; palpi nar- 

 row, scarcely spathulate, with the apices black, the remainder 

 ferruginous. Thorax light grey, scarcely bluish grey, with very 

 obsolete longitudinal duskier lines, and several rows of black 

 spots, giving rise to a longish pubescence; scutellum and meta- 

 thorax concolorous, the former with a few long stiff hairs. Ab- 

 domen narrow, cylindric, with the tip blunt and rounded, shining 

 ferruginous, with a white reflection, with scattered black hairs, 

 and others in rows at the tips of the segments ; a very obscure 

 dorsal line ; the upper part of the penultimate segment some- 

 times of greyish black ; apex beneath with pubescent not very 

 prominent appendages ; belly with a few radiating hairs on the 

 centre of each segment. Legs ferruginous with black pubes- 

 cence ; the fore coxae very fine whitish caesious, and the fore femora 

 slaty in front and on the sides ; tarsi black ; claws dirty whitish. 

 Poisers ferruginous at the base, their tips white ; yellow after 

 death j wing-scales small, white ; wings clear, the base of the 

 nervures near it somewhat rusty or yellowish, the costa bristled, 

 without a costal spine ; the small cross nervure slanted ; the 

 second upright, not quite straight. Length 2% lines. In the 

 female the frontal space is wide, the band orange or ferruginous, 

 with a white linear margin next the eyes ; eyelet triangle grey, 

 darker in the centre ; thorax fine caesious grey, without traces 



