c. Arista bare; distal portion of R4+5 broadly curved at the end; hypopleuræ with a sparse cluster of fine hairs. S. braziliana, Southern States and southward. Synthesiomyia B. B.
cc. Arista pectinate or plumose.
d. Arista pectinate. H. vittigera, with the posterior half of the abdomen metallic blue. Mexico. Hemichlora V. d. W.
dd. Arista plumose.
e. Middle tibia with one or more prominent setæ on the inner (flexor) surface beyond the middle, or inner surface very hairy.
f. R1 ends distad of the m-cu crossvein; R4+5 with a broad curve near its apical end. (= Neomesembrina Schnabl. = Metamesembrina Town). M. meridiana. Europe. Mesembrina Meigen
ff. R1 ends proximad of the m-cu crossvein.
g. Eyes pilose, sometimes sparsely in the female.
h. Female with two or three stout orbital setæ; the hind metatarsus of the male thickened below at the base and penicillate. D. pratorum. Europe. Dasyphora R. D.[M]
hh. Neither sex with orbital setæ.