DIPTERA. 283 
Sometimes the palette of the antennz is short, or moderately elon- 
gated, and either almost orbicular or nearly ovoid. 
Here, as in the last subgenus, the abdomen is narrowed at base and 
clavate. 
SpHEecina, Meig. 
Where the palette of the antenne is orbicular. The posterior 
thighs are clavate and spinous underneath(1 ). 
There, the abdomen is either triangular or conical, or almost cy- 
lindrical. 
In some, the wings hardly extend beyond the abdomen, which is 
frequently narrow and elongated. ' 
We will separate those whose posterior thighs are strongly in- 
flated, with the inner side armed with small spines. The closed 
cells of the posterior border of the wings are sinuous posteriorly. 
Eumervus, Meig. 
To which we unite his Zylote, where the abdomen is merely nar- 
rower and almost linear, and which we formerly placed among the 
Milesiz. Such is the / 
E. pipiens; Musca pipiens, L.; Panz.; Faun. Insect. Germ. 
XXXII, 20. About four lines in length; black; each side of 
the abdomen spotted with white. The humming it produces 
while on the wing is mingled with a sharp sound resembling 
the note of a young chicken(2). 
In the two following subgenera, the posterior thighs sometimes 
differ but little from those of the preceding ones, and are sometimes 
thicker, but unidentated at most. 
Miesia, Lat. Fab. Meig.—T7vopidia, Meig. 
Where the two posterior legs are abruptly larger than the others, 
with thick and unidentated thighs in several. The body is elon- 
gated, and the abdomen conical, or almost cylindrical and con- 
vex(3). 
(1) Idem. 
(2) See Meigen, genera Eumerus and Xylota. 
(3) Idem, genera Mylesia, Tropidia. The palette of the antenne of the Tro- 
pidiz is proportionally wider, and as if truncated or very obtuse. 
