180 THE SCOTTISH NATURALIST 



species ; eyes narrowly, but distinctly, separated ; thorax not 

 very distinctly brown-grey dusted ; abdomen distinctly blue- 

 grey dusted, dorsal stripe distinct, anal organ small ; legs black, 

 the fore knees but little paler; mid femora with the basal 

 two-thirds swollen, the tip third not greatly constricted ; 

 antero-ventral surface with a row of about twelve bristles on 

 the basal two-thirds, the last five or six being the strongest, 

 this row finishes at the thickest part of the femora and is 

 followed by a bare space, the constricted portion of the femora 

 having its apical half with a row of short closely-placed bristles ; 

 postero-ventral surface with a somewhat similar row of longer, 

 hair-like, and more numerous bristles; mid tibia almost 

 identical with that of scalaris ; its bristling normal; hind 

 femora with a rather widely placed row of short bristles, the 

 last four or five much the longest, on the antero-ventral surface, 

 and a row of hair-like bristles of almost equal length on the 

 postero-ventral surface; hind tibiae with a somewhat regular 

 row of short bristles, the longest being the one usually present, 

 on the antero-dorsal surface, a row of long hairs, becoming 

 more bristle-like towards the tip, on the apical two-thirds of 

 the antero-ventral surface, and a somewhat similar row of 

 softer and shorter hairs on the postero-ventral surface; wings 

 brownish, third and fourth veins convergent ; outer cross-vein 

 bent, last portion of fourth vein about two and a quarter 

 times the penultimate ; calyptra unequal, yellowish ; halteres 

 yellowish. 



9 . Black-grey ; frons about one-third the breadth of the head, 

 parallel - sided ; middle stripe sometimes brownish, at its 

 narrowest part broader than the orbits at that part ; orbits 

 grey dusted, somewhat shining behind; thorax grey dusted, 

 somewhat shining ; abdomen coloured as the thorax ; legs 

 entirely black; mid tibia with a ventral bristle; hind tibia 

 with a regular row of equally long, little bristles on the antero- 

 dorsal surface, the bristle usually present being the longest at 

 about one-third from the tip; antero-ventral surface with two 

 bristles. 4 to 6J mm. 



A very common species at Bonhill. It occurs along with 

 mittica, from which Stein does not separate the $ . 



1 6. kowarzii, Verr., £. Grey; frons, epistome, and jowls some- 

 what projecting, orbits silvered ; eyes narrowly separated ; 

 antennne of moderate length ; arista bare ; thorax grey ; 

 abdomen grey, dorsal line indistinct, anal organ of moderate 



