REPORT OF THE STATE ENTOMOLOGIST I912 120, 



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 



at its union with the third vein Lestremia Macq. 



aa Antennae greatly reduced, only 8-10 or 11 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 

 than the diameter Neocatocha Felt 



Catocha Haliday 



Macrostyla Winn. 

 1833 Haliday, A. H. Ent. Mag., 1:156 

 1840 Westwood, J. O. Introduct. Class. Tns. Syn., p. 127 

 1846 Rondani, Camillo. Nouvi Ann. Sci. Nat. Bologna, ser. 2, v. 7; 

 separate, p. 7 (Furcinerva) 



1846 Winnertz, J. Stett. Ent. Zeit., 7:20 ( Macrostyla) 



1862 Osten Sacken, C. R. Dipt. N. Am. Mon., 1:177 



1864 Schiner, J. R. Fauna Austriaca Dipt., 2 :4i2 



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. S. Wales Proc, 3:143 



