an error when Actorawas published in this Work, which was 



then given as Helcomyza ustidata (fol. 66)^ and Meigen's vols, 

 containing those genera not having been at that time published, 

 1 had no means of detecting the mistake. 



Helomyza is characterized by the bristly costa to the wings ; 

 and the peculiar manner in which the intermediate tibiae are 

 armed with bristles will be found valuable in distinjTuishing: them. 

 They are partial to damp situations, but not uncommonly enter 

 houses. The following British species may be thus arranged. 

 A. With a feathered or distinctly hairy seta to the antennae. 



2. rufa Fall.— Curt. Brit. Ent.pl. 5^5 ? . 



Taken by Mr. Haliday near Holywood as well as Nos. 5, 



10. 11, 14? 15 and 26, by Mr. F.Walker near Southgate, 

 and Mr. W. Clifton at Putney. 



3. flava Meig.r vol. 6.p. 50.— 5.pallida Fall. Meig. tab. 51. f. S 1 . 

 6. affinis Meig. 10. prseusta Meig. 



11. tigrina Meig. Length 3 lines, breadth 7:^. Ferruginous, 



antennas orange, the seta clothed with short hairs (fig. 3): 

 thorax and scutellum freckled : abdomen more or less 

 dusky on the back, edges of the segments black in the 

 male and producing long bristles, wings very pale fuscous, 

 the costa yellowish, transverse nervures brown, the tip fus- 

 cous, forming 3 spots: halteres whitish: thighs very pubes- 

 cent; tarsi pale ochreous, tips blackish, pulvilli orange. 



I found several on oaks at Cartland Craigs the 3rd Sept. 

 11''. trifasciata C?«f. Female 2 lines long, 6 broad; pale 

 ochreous, antennae bright, seta clothed with short hairs, 

 crown of head, thorax and base of scutellum slate-colour, 

 thorax clothed with exceedingly minute ochreous hairs, 

 with the shoulders entirely pale with them : abdomen with 

 the margins of the 3 basal joints piceous ; wings yellowish ; 

 very iridescent; tarsi, especially the posterior, densely 

 clothed with short black bristles. 



I took a female with the last species. 



12. griseola Meig. 



B. With a naked seta to the antennae. 



14. ustulata Meig. t.51.f. 30? Birchanger, Essex, Mr. Clifton. 



15. serrata Linn. De Geer, v. 6. tab. l.f. 15 — 18. Found on 



windows all the year, especially in the autumn. 



16. villosa Meig. Taken at Yarmouth by Mr. C. J. Paget. 

 18. fenestralis Fall. — 24. rufiventris Meig. End of July on a 



window at Dolbadam Lake in Wales. Mr. Clifton. 



26. inscripta Meig. — 27. huniilis Meig. 



30. ruficornis Meig. June; Mr. Clifton took 2 at Dover on 

 the stalks of nettles, one of which he kindly added to my 

 cabinet, and Nos. 3? 5, 6, 12, 15, 26 and 27 have been 

 taken near Putney by the same gentleman. 



.34. arenarum Hal. MSS. 



The Plant is Hypericum Afidrosccmum (Tutsan). 



