Studies on Tipulidae 11. 187 
Antocha. 
O. Sacken, Proc. Ac. N. Sc. Philad. 1859; Monogr. ete. IV, p. 124, 
Tab. 1, f. 11 (wing); Tab, 3, f. 10 (forceps). 
Taphrophila Rondani, Prodr. Vol. I, 1856 (insufficient and erro- 
neous data). 
Orimargula Mik, Wien. Ent. Z. 1883, p. 198, w. figure. 
The typical species, A. opalizans O. S., is apparently common 
to Europe and North-America. The north-american speeimens, re- 
ceived from different localities, I found to be very variable in size 
and color and, at one time, I was inclined to take them for different 
species. The european specimens are more uniform. 
Orimargula alpigena Mik, 1. c. from the austrian and bavarian 
Alps, is an Antocha with an open discal cell. The generic agree- 
ment is perfect. It seems to me that in Prof. Mik’s figure the auxi- 
liary vein is represented as too far remote from the first longitu- 
dinal. I remember seeing this species in Dr. Loew’s collection many 
years ago; the specimens are in the Berlin Museum now, and are 
labelled Kochel, Bavarian Alps, August 1867. 
I suspeet that Limnobia vitripennis Meigen, Vol. VI, p. 279 
which, as far as I know, has never been identified, is the european 
form of A. opalizans. Should this synonymy be proved, the question 
will arise whether it is applicable to the american specimens? In 
America this species is very variable in color and size; since I live 
in Europe I have caught many specimens of A. opalizans, without 
ever coming across a variety. Nevertheless I find in Monogr. IV, 
p. 127 that the variety, which at first I had described as a separate 
species (A. sawtcola) „also oceurs in Europe.“ I must have obtained 
that information from Schiner. At any rate the more common form 
in the U. States seems to be the same as the european. 
Taphrophila Rond., as I ascertained from a speceimen in Mr. 
Bigot’s collection, labelled by Rondani, is the same as Antocha. There 
is no description; the meagre data in the analytical table given by 
Rondani agree with Antocha, but are not sufficient for its recog- 
nition; this recognition is moreover rendered impossible by the fact 
that the typical species was wrongly determined as Limnobia in- 
usta Meigen (compare the Note on Rondani’s new genera, at the 
end of this paper). 
Atarba. 
O. Sacken, Monogr. etc. IV, p. 127, Tab. 1, f. 13, wing; 1869. 
A single north-american species. A very distinet and peculiar 
genus, 
