242 NEW YORK STATE MUSEUM 
fork is usually more or less skewed forward, and the an- 
terior deflection of Cu’ generally meets the middle of cell 
ist M*. In a good many genera the first fork of the radial 
sector is skewcd posteriorly, in opposition to that of media, thus 
widening cell R. Two aberrant genera Trichocera and Diazoma 
have the second anal vein short, the deflection of Cu! meeting cell 
Ist M? beyond, its middle and Sc* far retracted. The degenerate 
Rhicnoptila has the cross vein r touching Rs unusually far forward 
and an aberrant type of branching of the sector, both characters 
seen elsewhere in Amalopis and Pedicia of the Pediciini. Phyllo- 
labis is aberrant also in its abbreviated subcosta, which ends before 
the origin of the radial sector, in its abbreviated R? and in its 
widening outward of cell 1st M*—all characters found in Gono- 
myia.’ Podoneura is marked by its two branched second anal vein, 
the recession of the deflection of Cu? a little distance within the 
first median fork, and the recession of Sc? already mentioned. 
There are no highly specialized members of this tribe. Limno- 
Hintiz tOxOmetiira OS. [pol. us, me, 2] as raivelhy typical, 
The Pediciinae show a marked recession of Sc? toward the wing 
base, and a straightening out of the cord. Both Rs and M have 
usually three branches, the former with the second fork deep and of 
Vatiablesty pes. .W ia lo pits ienicomusit ainsi Onn Sunicmexcecaimeniy, 
variable sometimes in its venation? But not everywhere and 
always, for I have been especially looking for variation and 
have collected this species both east and west in large numbers, 
and alas, all my specimens appear to be quite normal. ‘This is the 
only species of Limnobiinae in which I have found the median 
cross vein touching M? after its separation from M®* [pl. 25, fig. 1]. 
Dicranota Rhaphidolabis and Plectromyia are set apart bya 
behavior of the median vein that is just the opposite of that here- 
tofore noted for the Cylindrotomini. The base of it is in direct 
line with M'™2, and M3 is offset on the posterior side. 
The Eriopterinae constitute a large assemblage of heterogeneous 
forms among which several distinct groups of genera are seen. The 
median vein is usually two branched (in Cladura three branched) — 
and the sector is three branched. Molophilus and Conosia tend to 
depart from the typical Tipuline type of branching of the sector 
‘TI believe Phyllolabis Doane should be associated with Gonomyia, but it 
it is net quite clear to me from the study of the venaticn alone just where . 
Gonomyia should be located among the tribes. 
2 Witness the figures of Johnson in Entomological News, 12:305, text 
fig. 1-6. 
