1905.] 83 



2. A. leucocephala Meig. : the commonest British species from Pen- 



zance to Aberdeen. Is it called leucocephala because it is 

 the only common species with a black face ? ! 



3. A. argyria Meig. : this and the next are two rather small species 



which are not easily distinguished. A. argyria is the less 

 common of the two, but 1 have seen it from Sussex to 

 Sutherland. 



4. A. argentina Meig. : common over all Britain. 



5. A. confinis Zett. : a rare species, but I have taken odd specimens 



in at least Hampshire, Surrey, and Cambridgeshire. 



G. A. atriceps Lw. : an unmistakable Argyra, though it has but little 

 silvery gloss. I first caught it in Millersdale on June 18th, 

 1888, and I took two more at or near Three Bridges (one in 

 Sussex and one in Surrey) in June, 1892. 



7. A. elongata TaqXA,. : only known as British, or rather Irish, from 

 Haliday's record in Walker's Ins. Brit. Dipt., i, p. 209. I 

 see no reason to doubt its correct identification. Since I 

 wrote the above Col. Yerbury took one male at Nairn on 

 July 11th, 1904. 



Three or four more species ought to occur in Britain. 



17. LEUCOSTOLA Lw. 



This genus is separated from Argyra only by the glabrous basal 

 joint of the antennae. It may be an unnecessary genus, but its re- 

 tention is convenient. 



L. vestita Wied. is like a small Argyra. Not uncommon in Hamp- 

 shire, Sussex, Essex, Cambridgeshire and Suffolk ; also taken by Mr. 

 F. Jenkinson at The Aird in Koss. 



18. TERYPTICUS Gerst. 



T. hellus Lw. : this species was described by Loew from a speci- 

 men taken by me near Kew on August 4th, 1868 (and not as Loew 

 stated on July 14th), and I have since taken it in Hampshire, Sussex, 

 Suffolk and Norfolk, while on the continent it has occurred rarely in 

 various localities from Galicia to Dalmatia. It is a veritable tiny 

 gem, but has been but little recognised until quite recent years. 



The specimen I sent to Loew, from which his description waa 

 made, is the only one 1 have ever seen with the lovely violet colour, 

 all the others being of the usual green colour. 



{To he continued). 



