REPORT OF THE STATE ENTOMOLOGIST IQI2 129 
subfamily. The members of this group appear to depend to a con- 
siderable extent upon the olfactory organs. Many of the species 
falling in this division subsist in the larval stage on dead or decay- 
ing vegetable matter. 
This group is a connecting link with the Mycetophilidae from 
which it is most easily distinguished by the absence of tibial spurs 
and the moderate development of the coxae. 
Lestremiinariae 
The members of this tribe are separable from all other Itonid- 
idae by the forked fourth vein and by the generalized character 
of the antennae. These organs may be moderately well developed 
as in Lestremia and Catocha, or greatly reduced as in Tritozyga 
and Microcerata. 
Key to living genera 
a Antennae at least moderately developed, with 11-16 segments, the 
second not decidedly enlarged 
b Costa continuous and extending beyond the apex of the wing...... 
Catocha Hal. 
bb Costa not attaining the apex of the wing, practically disappearing 
AI SuIMLOMawaeh tie; thiands vette. ak yas e.)- Lestremia Macq. 
aa Antennae greatly reduced, only 8-Io or I1 segments 
b Second antennal segment greatly enlarged; flagellate segments 
very short 
c Fork of the fourth vein with the two branches even........ 
Microcerata Felt 
cc Fork of the fourth vein with the branches irregular........ 
Tritozyga H. Lw. 
bb Second antennal segment normal 
c Flagellate segments not greatly reduced........ Neptunimyia Felt 
cc Flagellate segments sessile, with a length only a little greater 
Eliane mCaIMe Ley cl) wae tewcises ao sie cae sieaeies = Neocatocha Felt 
Catocha Haliday 
Macrostyla Winn. 
1833 Haliday, A. H. Ent. Mag., 1:156 
1840 Westwood, J. O. Introduct. Class. Ins. Syn., p. 127 
1846 Rondani, Camillo. Nouvi Ann. Sci. Nat. 3ologna, ser. 2, v. 7; 
separate, p. 7 (Furcinerva) 
1846 Winneftz, J. Stett. Ent. Zeit. 7:20 (Macrosty la) 
1862 Osten Sacken, C. R. Dipt. N. Am. Mon., 1:177 
1864 Schiner, J. R. Fauna Austriaca Dipt., 2:412 
1870 Winnertz, J. Vehr. z—-b. Ges. Wien., 20:27-28 
1876 Bergenstamm, J. E., & Low, Paul. Syn. Cccidomyidarum, p. 17 
1888 Skuse, F. A. A. Linn. Soc. N. 5. Wales Proc., 3:143 
