DIPTERA. SYRPHIDZ. 137 
BRACHYOPA Hoffm. Rutnera p. Fall. 2sp. M. conica Pz. Meig. pl. 30. f. 6. 
Wings large; abdomen short, ovate-conic; head with a frontal protuberance ; 
nasus short ; legs simple; third joint of antenne round ; seta pilose at base. 
CHRYSOGASTER*Meig. Enistrauis p. F. 13sp. M. viduata L. 
Abdomen depressed, ovate; antennz short; face generally with a protuberance 
in ¢; third joint of antennz rounded; terminal nerve of the first posterior 
cell parallel with the margin of the wings. Meig. pl. 30. f. 17. 
ORTHONEURA Macq. Curysocaster Meig. 2 sp. C. nobilis Meig. 
Differs from Chrysogaster in the third joint of antenne elongate, narrow, and the 
terminal nerve of the first posterior cell perpendicular. Meig. pl. 30. f. 9. 
SYRPHUS Ste., Meig., nec Fab. Curinosia Enc. M., Macq. 24sp. M. ruficornis L. 
Abdomen elliptic, depressed, not banded ; third joint of antennz oval ; legs slen- 
der; tarsi simple in both sexes. Curt. 753. 
SCZEVA Fab., Ste. Cat., Curt. Syreuus Enc. M., Macq. 28 sp. (Sp.typ. Fab.) Pyrastri L. 
Abdomen elliptic, depressed, banded ; tarsi simple in both sexes; sexual organs 
of ¢ concealed. Curt. 509. 
Obs. Stephens gives S. ornatus and festivus, as the types of a distinct 
unnamed subgenus (1244.); they form division 2. subdivision 1. A. of 
Syrphus, in Enc. Méth. Macquart unites them with Doros. 
Spuyaropnoria Enc. M.) 6sp. M. scripta L. Meig. pl.30. 
eee ol (a. 1242. St. Cat.] } ee he “s 
Tarsi simple in both sexes ; abdomen fasciated, linear, very long in g, in which 
sex the sexual organs are exposed. 
PLATYCHEIRUS Enc. M. Curttosta Hag. (St.Cat.) 17 sp. S. scutatus. 
Anterior tarsi dilated in the males; abdomen linear, fasciated. Meig. pl. SO. 
1b Bills 
SERICOMYIA Latr. Musca p. Linn. 3 sp. S. Lappona L. Meig. pl. 31. f. 9. 
Broad, robust ; third joint of antenne orbicular; seta plumose; hind legs not 
spined. 
TROPIDIA Meig. Enrisratis p. Fall. 1sp. TT. rufomaculata. Curt. 401. 
Elongate; hind thighs thick, with a strong tooth near the tip; third joint of an- 
tenn large, rhomboidal ; seta naked; nose keeled. 
MERODON Fab. Mrresia p. Latr. 2sp. A. clavipes F. Curt. 98. 
Robust, hairy ; hind thighs with a strong apical tooth ; face without prominences, 
third joint of antennz oval. 
HELOPHILUS Meig. Enisratis p. Fab. 8 sp. M. pendulus L. Curt. 429. 
Robust, hirsute ; fourth Jongitudinal nerve greatly curved before the apex; pos- 
terior thighs simple ; eyes ¢ not contiguous. 
ERISTALIS Fab. UHetoruitus Leach. 17 sp. M. tenax L. Curt. 432. 
Robust, hirsute; fourth longitudinal nerve greatly curved before the apex; pos- 
terior thighs simple; eyes g contiguous ; seta of antennz naked or plumose. 

* “ Chrysogaster.—Macquart has generically distinguished the species of Meigen’s 
second division. But there remains confounded a species of peculiar characters ; 
viz. Chr. discicornis ( 6 —Chr. metallicus 9 ), with the front broad in both sexes — 
the labrum, palpi, and maxille all nearly equal in length to the labium. Chr. 
grandicornis, 1 suppose, is in the same circumstance. ‘The broad front has misled 
Meigen as to the sex.” (Haliday’s MSS.) 
