sO NEW YORK STATE MUSEUM 
1892 Theobald, F. V. Acct. Brit. Flies, p. 51, 87 
Leon) wetter, J, J.. soc, Pot: br Bullyp, 319 
1897 Syn. Cecid. Eur. & Alg., p. 52 
1600) ———————) Soc) Mat. Hn Ami Coss, A430 (tr uemesibtinertaweds) 
1908 Felt, E. P. N. Y. State Mus. Bul. 124, p. 308-9 
IQII ————— a NYA e Eo iit SOC m Ollie OES T 



The species referable to this genus are easily recognized by costa 
being continuous and extending beyond the tip of the third vein, 
which latter unites with the margin at the apex of the wing. The 
fourth vein is forked, the cell usually being much shorter than in 
Lestremia. The antennae differ greatly from those of Lestremia, 
being in the male of C. americana (figure 17) distinctly bino- 
dose, while in the case of C. slossonae the segments are long, 
slender and distinctly stemmed. There are 16 antennal segments 
in the two known American species. Type C. latipes Haiid. 
Europeans forms are recorded as having 14 to 16 antennal seg- 
ments in the male and 10 to 12 segments in the female. The geni- 
talia of our American species are of a quite different type from 
that found in Lestremia. 
Nothing is known concerning the life history of American forms. 
Kieffer states that the larvae of the European C. muscicola 
Kieff. occur on mosses. It is probable that these forms are sylvan 
as in the case of Lestremia and allied genera. Our species are 
doubtless boreal in habitat. 
Key to species 
a Length 4 mm; antennae binodose, terminal clasp segment long, ap- 
pendicilatempasalllivenmne oe eee eee ee aim eirarcra mam elt CaoZ26 
aa Length 4 mm, antennae uninodose, terminal clasp segment short........ 
brasy biekmansasps 
aaa Length 1.5 mm; antennae uninodose...... s los'stonave elie Gxoen 
Catocha americana Felt 
1908 Felt, E. P. N. Y. State Mus. Bul. 124, p. 309 
This species, received for study through the courtesy of the 
United State National Museum, was taken at Franconia, N. H., by 
that well-known collector, Mrs A. T. Slosson. 
Male. Length 4 mm. Antennae nearly as long as the body, 
thickly haired, dark brown; 16 segments, the third with the basal 
enlargement somewhat produced, the fourth and following, each 
slightly binodose, the basal subcylindric enlargement with a 
length nearly four times its diameter (figure 17). Palpi; the first 
