DIPTERA. 247 
Ommatius, Illig. Wied.(1) — 
Sometimes the tarsi are terminated by three hooks, the interme- 
diate of which replaces the two pellets. 
Gonyrus, Lat.—Leptogaster, Meig. 
The stilet terminates in a short seta. The abdomen is long and 
almost linear, and the tarsi are arcuated(2). 
In the others, Hybotini, Lat., the head is more rounded, almost 
entirely occupied by the eyes, in the males, and its epistoma frequent- 
ly naked, or but slightly pilose. The proboscis is very short. The 
wings present fewer nervures than those of the preceding ones, and 
their inner portion is destitute of that complete triangular cell, 
whose point rests upon the posterior margin, or at least itis merely 
rudimental. 
Sometimes the last: joint of the antennz is large, fusiform, elon- 
gated, and terminated by a very small stilet. 
CEpatEA, Meig. 
Sometimes the last joint is ovoid, short, or conical; and with a 
long seta(3). 
Hysos, Meig. Fab.—Damalis, Fab. 
Where the posterior thighs are large and inflated(4). 
Ocypromia, Hoffm. Meig. 
Where they are of an ordinary size(5). 
g 
(1) Wied., Dipt. Exot., 213. 
(2) See the authors just quoted. 
(3) Idem. M. Macquart, Dipt. du nord de la France, has established two new 
genera in this division: Micrornora, similar to G2dalea in the elongation of the 
third joint of the antennz, but with an elongated stylet; and Lumroreza, closely 
allied to Ocydromia, but with the stilet entirely terminal, whilst in the latter it is 
inserted in the back of the third joint, a little beneath its extremity. 
(4) See the same works. 
(5) Idem. 7 
