DIPTERA. Jit 
aplumous seta. The inferior extremity of the head projects in the 
manner of a truncated snout(1). 
The antennz of the others are manifestly as long as the head or 
longer. 
SEeEDON, Lat.—Baccha, Fab. 
Where the antennz are considerably longer than the head, with 
the second joint much longer than the last and cylindrical; the lat- 
ter forms an elongated, pointed triangle furnished with simple 
setze(2). 
Teranocera, Dum. Lat.—Scatophaga, Fab. 
Where the antennz are as long as the head, or a little longer, 
with their second joint compressed, forming a long and narrow 
square, as long as the third, or only a little longer; the third joint 
is similar to that of the preceding subgenus, but the seta is some- 
times plumous(3). 
The sixth division, that of the Leproropires, is remarkable for 
the length and tenuity of the legs, the two last being at least twice 
the length of the body, which is also slender and filiform; the two 
first are distant from the others; all the tarsi are short. The head 
is spherical or ellipsoidal, and terminates in a point; its length equals 
or surpasses its transverse diameter. The termination of the abdo- 
men is pointed in the females, and clavate in the males. The an- 
tenn are very small, and are inserted on the front. These Muscides 
are found on plants, and several frequent aquatic localities. In the 
Microreza, Meig. 
Which I formerly distinguished by the name of Calobates, the head 
is ellipsoidal and terminates in a point; the last joint of the antenne 
semi-orbicular, and the seta simple. ~The space which separates the 
(1) Scatophaga cherophylli, Fab.; and some species of Tetanocera. 
(2) Lat., Gener. Crust. et Insect. , IV, 349. 
(3) Lat., Gener. Crust. et Insect., IV, 349. This subgenus should be re-exa- 
mined. Some of the species may be referred to Sepedon—S. rufa, rufipes, Fab — 
and others will form separate subgenera. Some of them are connected with Os- 
cinis and Dryomyza. 
