DIPTERA. 303 
RopaLoMERA, Wied. 6 
Where all the thighs are inflated, and the face presents a promi- 
nence or tubercle anteriorly(1). 
Ocurera, Lat.—Musca, De Geer.—Tephritis, Fab.—Macrochira, 
Meig. 
Where the two anterior thighs are very large, compressed and 
dentated beneath, and the tibiz are arcuated, capable of being flexed 
on the inferior edge of the thighs, and terminated by a strong 
spine(2). 
The thighs of the other Hydromyzides are not inflated. 
Epuypra, Fall. 
The Ephydre resemble the Ochterz in the prominence of their 
eyes, which project posteriorly beyond the head, and in their thick 
snout; but the seta of their antenne is simple, and merely thickened 
inferiorly; the palette is rounded at the end. ‘There is alittle tuber- 
cle or prominence ou the posterior part of the vertex(3). 
Noripuita, Fall. 
Where the head is more rounded, and without any anterior prolon- 
gation in the form of a snouts the eyes are less protuberant, and do 
not project beyond the posterior margin of the head. The seta of 
the antennz is plumous; the palette is proportionally more elongated 
than in Ephydra and less rounded; no tubercle or prominence on the 
vertex. 
We have followed the system of M. Fallen in placing this subge- 
nus here, although we think it would be more proper to arrange it 
in the ensuing division, near the Heleomyzz, from which it scarcely 
differs. The 
NV. cellaria, Panz., Faun. Insect., Germ., XVII, 24, which 
(1) Wied., Anal. Entom. 
(2) Lat., Gener., Crust. et Insect., IV, 347. 
(3) Fall., Dipt., and Wied., Ibid. 
