158 THE SCOTTISH NATURALIST 



9 . Somewhat similar in appearance to the $ ; the frontal stripe 

 about one-third the breadth of the head, nearly parallel-sided, 

 middle stripe black-brown, reddish in front, orbits grey dusted, 

 at their broadest part not half so broad as the middle stripe ; 

 thorax as in the £ , but the shoulder-points yellow and the 

 scutellum almost entirely yellow ; abdomen fulvous, sometimes 

 darkened at the. apex, which is rather pointed; legs coloured as 

 in the £ , but with only the usual bristles; wings clearer and 

 not so pointed as in the £ . 5 mm. 



Rare in Scotland. I have only met with one $ at Bonhill, 

 8th August 1908. My series was sent me by Mr F. C. Adams, 

 from New Forest, and are dated 15th August 1906. 

 4. pallitibia, Rnd., £ . Black ; eyes separated by a narrow line, 

 very large, in profile occupying almost the entire side of the 

 head ; antennas rather short and broad, third joint barely twice 

 as long as the second ; arista slightly pubescent ; thorax shining 

 black, almost without dusting except on the sides, and without 

 stripes ; abdomen with slight dusting, distinctly shining, dorsal 

 line distinctly triangularly dilated on each segment, anal organ 

 of moderate size ; legs brownish yellow, the femora darker, tarsi 

 black ; mid femora not very distinctly contracted at the tip, the 

 antero-ventral surface with about five or six bristles from the 

 base to the middle, and from there to the tip the bristles are 

 shorter and closer together, postero-ventral row beginning with 

 the usual long hair-like bristle, decreasing in size towards the 

 tip (this row begins on the ventral surface at the long bristle, 

 and finishes on the postero-ventral surface, so that I have had 

 some difficulty in assigning a definite name to it), the other 

 bristling on the posterior surface, rather long and hair-like, 

 ending in three or four strong bristles at the tip ; mid tibia not 

 much thickened on the apical half, clothed with pubescence on 

 the ventral surface, which is distinct, but not long, on the basal 

 half, and long, somewhat erect, and rather loose on the apical 

 half, the usual bristles present; hind femora with an antero- 

 ventral row of short bristles which ends in two longer and 

 stronger bristles at the tip, and a somewhat similar row on the 

 postero-ventral surface which ceases about one-third from the 

 tip; hind tibia with the usual four bristles; wings browned, 

 third and fourth veins almost parallel, outer cross-vein almost 

 straight, last portion of fourth vein about two and a half times 

 the penultimate; calyptra equal in size, brownish; halteres 

 brown. 

 9 . Frontal stripe almost one-third the breadth of the head ; 



