REPORT OF THE STATE ENTOMOLOGIST 1907 243 
as already explained in the part preceding; these also differ from 
all others of the tribe in that the first apparent fork of the sector 
is skewed upward and the second downward. ‘The shifting of vein 
M2 upon the median cross vein after the atrophy of its own basal 
deflection occurs in Mesocyphona and Dasyptera (subgenus of Rhy- 
pholophus), in Gonomyia and Trimicra. Outside the tribe this oc- 
curs also in at least two species of Dicranomyia and in Elliptera 
and Thaumastoptera). Sc* shows all stages of progress in reces- 
sion from the tip, and Sc as a whole, and with it R?, tend to shorten 
in Gonomyia and its allies. There is a marked convergence toward 
the wing apex of the tips of most of the veins in the more typical 
Eriopterini. 
The Anisomerini constitute a little group that has been set apart 
on the reduced number of antennal segments (6-10). In venation 
it shows in the genus Anisomera marked range of variability in 
the number of branches of the median vein. The most marked 
venational peculiarity of the tribe seems to be the wide forking of 
the cubital vein at an unusually remote point, far outward toward 
the wing margin. Penthoptera, here figured for the first time, is 
perhaps as generalized as any member of the tribe. In all, the 
tadial sector is three branched and typical, and Sc? remains near 
the tip of the vein. 
The Limnobiini have the radial sector reduced to two branches, 
and likewise, the median vein, and the cross vein m is preserved. 
There are a few freakish forms included, as plate 18 testifies, but 
in the main the tribe is one of the most homogeneous. As in Cylin- 
drotomini the median vein is strongly deflected forward at its first 
fork. 
The Antochini is the tribe that contains the extremes of most 
venational phenomena, the extreme recession of the deflected base 
of Cut and of the Media in Diotrepha, the extreme. reduction of 
the radial sector in Toxorrhina, and of the angulation of the anal 
angle of the wing in Antocha etc. Many of the genera are loosely 
associated. 
Many further details of venation applying to groups of genera 
or to single genera will be found in the key which follows. I have 
prepared this key based on venation not because I think the vena- 
tion more important than other structures, but because it may be 
a means for the communication of some further data, and because 
lam convinced that some of the best systematic characters which 
venation offers have been hitherto unused, It should be borne in 
