132 THE ENTOMOLOGIST. 



any specimen. 0. hyclroleon having pubescent eyes, would fall in 

 Eondani's genus Psellidotus. 



7. Sargus, F. (1798), Ent. Sys. Supp. 566. 

 = Nei/otelus, DeG. ; musca, L. 



Walker and Curtis both describe this genus as being destitute 

 of palpi, but these organs (though small) are present. 



Brown suffusion around stigma . . . . cuprarius. 

 No suffusion. 



Wings almost clear. flavipes. 



Wings uniformly pale brown .... inftiscatus. 



1. S. cuprarius, L. (1761), F. Suec. 1853. = violaceus, Scop.; 

 caruleicollis, Mg.; nubeculosus, Zett.; larva, De Gr. Ins. vi.pl. xii. — 

 Zetterstedt's nubeculosus was ranked by Walker and Schiner as 

 distinct, the former suggesting that it was a variety of this 

 species. Zetterstedt made its inferior size the principal dis- 

 tinction, but I have seen specimens showing every grade in size. 

 Van der Wulp, the latest authority on this family, also ranks it 

 as a var. of cuprarius. Common everywhere ; London included. 



2. S. infuscatus, Mg. (1822), Sys. Bes. iii. 107. = cuprarius, 

 Linne's Coll.; indicus, Harr. ; auratus, Mg. ; iridatus. Walk. — 

 Common, and widely distributed. Easily recognised by the 

 uniformly brown wings. Taken occasionally in and about London. 



3. S. flavipes, Mg. (1822), Sys. Bes. iii. 108, pi. xxv. 14.— 

 Zetterstedt mentions that the femora in the male are black. It 

 is important to know this, as it affords an easy method of distin- 

 guishing it from the male of C bipunctatus, in which species the 

 legs are entirely tawny-yellow in both sexes. Rather uncommon, 

 though Walker describes it with his customary and monotonous, 

 " generally distributed." S. nitidus, Mg., was introduced as British 

 by Curtis, but I can find no specimens belonging to this species. 



8. Chrysonotus, Lw. (1855), Verb. Zoo. Bot. Ges. v. 131. 



— Sargus, Walk., Curt. ; Musca, Scop. 



1. C. bipunctatus. Scop. (1763), Ent. Carn. 341. =^ Reaumur, 

 F. ; transformations, Reaumur, Mem. iv., PI. xiii., xiv., xxii. — 

 Uncommon, almost rare. It has occurred in Yorkshire, Kent, 

 and other well-separated localities. Curtis' figure of the antenna 

 is incorrect. 



9. Chloromyia, Dune. (1837), Mag. Zoo. Bot. (1837). 



= Musca, L. ; Nemotelus, De G. ; Sargus, F. ; Cheysomyia, 

 Walk., Schin. ; Chlorisoma, Chlorosia, Eond. 



Prof. Van der Wulp, in his ' Diptera Neerlandica,' retains the 

 old generic name, Chrysomyia, for this species, and includes in 

 the same genus both species of Microchrysa. I am rather 

 doubtful of the right of Chrysonotus to generic rank, but 

 Chloromyia and Microchrysa seem quite distinct. 



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