14') [December, 



Plashett Park, near Lewes, on August 4th, 1872, and also caught some 

 females this spring, on April 17th, at Blackboys, near the centre of 

 Sussex. 



S. PUMiLUS, Mg. — I have collected this sparingly in the Xew 

 Forest, at TJpware, and at Aberdeen. 



S. TAKSATua, Fall. — This species abounds on Scotston Moor, near 

 Aberdeen, and I saw it near Inverey, Braeniar. 



S. (EDio'EMtTs, Lw. — "When at Eannoch, I caught sereral speci- 

 mens of a S^ntormon, which I thought was undescribed ; and, still 

 failing to identify it when I caught both sexes at Braemar, in some 

 notes in the Scottish Naturalist on the Diptera at the latter place, I 

 referred to it as being in my collection under the MS. name of 

 8. crassipes. A critical examination of it, with a view to description, 

 and a comparison of the descriptions of all the European species, 

 enabled me at last to refer it to the little-known S. cedicnemus, Lw. 

 The following are some of its characters :— 



Dark green, face narrow, more so from the middle downwards, silvery-white, 

 palpi brown ; frons shining green ; antennse long, the third joint outside below being 

 more than three times as long as the other two, for more than half its length it is 

 rather broad (more than one-third its own length) , but then rather suddenly narrows 

 to about one-third its previous widtli, running almost to a point, from which springs 

 the stoutish arista, which is about two-thirds the length of the third joint, the joint 

 itself bears a dense and rather long pale brownish pubescence, and the arista is 

 distinctly, though minutely, pubescent, the first joint has one or two small bristles 

 on its disc above, and the species must therefore belong to the genus Si/ntormon ; 

 the cilia of the lower orbit are whitish ; the thorax is dark green, the breast -sides 

 greyish, the pleurse pale-haired, the abdomen is coppery-green, the pubescence near 

 its base pale, the genitalia are rounded, small, and almost concealed, the rounded 

 knob bears pale hairs behind. The legs are yellow, front coxaj yellow with some 

 whitish, and one (or two) black bristles, the hind coxffi dark grey, with the tips 

 and trochanters yellow, the usual few black bristles on the middle pair, and one on 

 the hind pair, the posterior coxse all with some wliitish hairs, front tibia3 with one 

 bristle in front about one-third of the way down, front tarsi pale at the base, middle 

 femora with one bristle in front and one behind near the tip, middle tibite some- 

 times dark at the tip, with three bristles down the outside besides the apical 

 one, and one beliind just below the first of those on the outside, one near the 

 third, and one larger one in front near the third, middle tarsi pale on the basal lialf 

 of tlie first joint, or sometimes all black, hind femora black at the tip, and hind tibiso 

 all blackish except the darkish luteous base ; the femora bear one bristle behind and 

 about three beneath near the tip, the hind tibite gradually dilate from base to tip, 

 thev arc rather compressed from the sides, considerably bristly, with three large 

 bristles down the outside (besides the apical) and an approach to a ciliatiou inside, 

 the iiides arc channeled, the basal joint of the black tarsi is slightly thicker than the 



