SCOTTISH PHORID& 89 



5. (8.) Legs long and slender, palpi dusky. 



6. (7.) Halteres pale; first thin vein leaves at beyond the fork of 



thick vein. perennis, Mg. 



7. (6.) Halteres black ; first thin vein leaves at the fork (i.e. at base 



of second vein). vitrea, Wood. 



8. (5.) Legs of ordinary form, palpi yellow, luteifemorata, Wood. 



9. (4.) (12.) Scutellum with 4 bristles of equal size. 



10. (n.) Fourth thin vein indistinct, but traceable to almost, if 



not quite, the margin of wing ; genitalia of $ slightly 

 shining and projecting, the lamellag seldom much 

 exposed; proboscis of $ normal. lugubris, Mg. 



11. (10.) Fourth thin vein broken off abruptly at about halfway to 



margin of wing ; genitalia of highly polished, much 

 projecting, and with the lamellae generally widely 

 extended ; proboscis of $ very large and projecting. 



opaca, Mg. 



12.^(4.) (9.) Scutellum with two strong bristles, and the two 

 anterior bristles much reduced in size. 



13. (14.) Costa thickened on the outer third; wings darkened, 



especially in the $ . intermedia, Mall. 



14. (13.) Costa not thickened on outer portion; wings clear in 



both sexes. sublugubris, Wood. 



palposa, Zett., is apparently very rare, and is only recorded 

 from England, as are also trinervis, Beck, perennis, Mg., 

 and luteifemorata, Wood. 



vitrea, Wood, I have taken three specimens of at Bonhill. 

 lugubris, Mg., is not uncommon at Bonhill in June. 

 opaca, Mg., I take every season at Bonhill, and I have 



seen it from Gorge of Avon (King). 



intermedia, Mall., is a very common species at Bonhill. 

 I have also seen it from Cambridge (Jenkinson), and 

 Dr. Wood has taken it at Hereford. 



sublugubris, Wood, I have about six specimens of from 

 Bonhill. 



STENOPHORA, Mall. 



Generic description : Antennae sometimes enlarged, arista dorsal ; 

 costa to about the middle of wing ; second vein present ; mid 

 tibia? with two bristles at about base, and the sub-apical bristle very 

 weak or absent ; hind tibiae with one outer hind marginal bristle ; the 

 first thin vein is bent at base, and the fourth is always complete. 

 Type : unispinosa, Zett. 



Table of Species. 



i. (2.) Mediastinal vein incomplete; second broken at its junction 

 with the third. pubericornis, Mall. 



