Diptera 
287 
hh. Antennae of six to fifteen segments, those of the male usually 
plumose; legs frequently slender and wings narrow 
. CHIRONOMIDiE 
i. Media forked (except in the European genus Brachypogon ) ; 
thorax without longitudinal fissure and not produced over 
the head (except in four exotic genera); antennae usually 
fourteen-jointed in both sexes; fore tibia with a simple 
comb of setulae, hind tibia with two unequal combs, 
middle tibia without comb. CeratopogoniNjE 
j. Thorax produced cap-like over the head, wing narrow 
and very long. Jenkinsia, Macroptilum and Caly- 
ptopogon, eastern hemisphere; Paryplioconiis, Brazil, 
jj. Thorax not produced over the head. 
k. Eyes pubescent, empodium well developed, or if short 
then R2+3 distinct and crossvein-like or the 
branches of R coalescent; r-m crossvein present; 
fore femora not thickened; wing either with ap- 
pressed hairs or with microscopic erect setulae 
. Dasyhelea Kieff. 
kk. Eyes bare, or otherwise differing from the foregoing. 
I . Empodium well developed, nearly as long as the 
claws and with long hairs at the base; femora and 
fifth tarsal segments unarmed, i.e. without spines 
or stout setae; fourth tarsal segment cylindrical, 
m. Wing with erect and microscopic setulae. Widely 
distributed. 
.(= Atrichopogon) Ceratopogon Meig. 
mm. Wing with long and depressed hairs. Widely 
distributed . Forcipomyia 
n. Hind metatarsus shorter or not longer than the 
following (i.e. the second tarsal) segment 
. Subgenus Prohelea Kieff 
nn. Hind metatarsus longer than the following 
segment .... Subgenus Forcipomyia Meig. 
II . Empodium short, scarcely reaching the middle of 
the claws, or vestigial, 
m. R-m crossvein wanting. 
n. Palpi four segmented; inferior fork of the media 
obliterated at the base. Australia . 
. Leptoconops Skuse 
nn. Palpi three-segmented. 
o. Legs spinulose, tarsal claws of the female 
with a basal tooth or strong bristle, those 
of the male unequal, the anterior with a 
long sinuous tooth, the posterior with a 
short arcuate tooth. Italy . 
. Mycterotypus No£ 
