162 Descriptions of British Diptera. 
fries-shire," Sir William Jardine, Bart. " Woods near Newby 
Cross, in the vicinity of Carlisle," T. C. Heysham, Esq. " Bath," 
Charles C. Babington, Esq. " Twizell," P. J. Selby, Esq. " Com- 
mon in Ireland," A. H. Holiday, Esq. 
2. SARGUS INFUSCATUS. (s.) 
Meigen, Zwei. iii. 107. 
Antennae, head, eyes, and thorax as in the last ; abdomen cupre- 
ous, glossed with violet behind, and entirely of the latter colour in 
the female, the base sometimes with a cupreous tinge: wings most- 
ly suffused with dusky brown, the region of the stigma and discoi- 
dal cell darker than the rest, the base rather pale : legs obscurely 
fuscous. 4^-5 lines. 
By no means a scarce insect throughout Britain, and so closely al- 
lied to the preceding that the respective species are not readily dis- 
tinguished ; indeed there is every reason to believe that this is a 
mere variety of S. cuprarius. It is not very rare in gardens near 
Edinburgh, and in Dumfries and Roxburghshires. " Raehills/' 
Rev. William Little. " Beginning of June, roads and gardens near 
London," Curtis, I.e. "Near Twizell," P. J. Selby, Esq. " Woods 
near Newby Cross," T. C. Heysham, Esq. " Bath : Needwood 
Forest, Staffordshire," Charles C. Babinglon, Esq. 
3. SARGUS NITIDUS. 
Meig. Zwei. iii. 108. 
Very closely resembling the two preceding insects in its general 
appearance, but differs in being considerably less, and in wanting 
the purple band across the eyes. The wings are dusky, but not so 
dark as in S. infuscatus, and the stigma is obsolete ; in other re- 
spects it nearly agrees with the species just named. 3 lines. 
Apparently rare ; it has been taken, however, near London. " At 
Portland, 28th June," J. C. Dale, Esq. 
4. SARGUS FLAVIPES. (.) 
Meig. Zwei. Insecten, iii. 108. pi. 25, fig. 14. 
Hypostome and forehead deep glossy black, with a bluish tinge, 
and two minute whitish points over the base of the antennae ; the 
latter dark-brown: surface of the thorax and scutellum brilliant 
golden green, sometimes glossed with copper-colour, the breast and 
sides black, all these parts thinly covered with whitish pubescence ; 
abdomen shining copper-colour above, more or less tinged with steel- 
blue towards the apex, especially in the female ; the under side near- 
