I02 
DIPTERA 
55. Genus RHYMOSIA, Winnertz 
Rhymosia, Winnertz, Verh. Zool.-bot. Ges. Wien, Vol. i3, p. 8io (29) (i863). 
Characters. — Head oval, vertex somewhat raised, front broad, narrowed anteriorly; eyes 
nearly circular, somewhat bulging ; ocelli three in number, the laterals large, closely contiguous to the eye 
margin, the middle one very minute, placed in a groove on the front, sometimes almost concealed; 
palpi incurved, four jointed, first joint very small, the fourth longer than the three preceding; antennae 
2-1-14 jointed, basal joints differentiated, setose at the apex, ihe flagellar joints cylindrical, compressed, 
pubescent. Thorax oval, highly arched; mesonotum short haired, usually only the margin with setae; 
scutellum large, margin setose ; metanotum high, steep. Abdomen of the male six segmented, with 
small terminal segment and rather small forceps (PI. 7, Fig. 13), that of the female seven segmented, 
slender, constricted at the base, compressed, with short, stout ovipositor and a pair of terminal lamellae. 
Legs long and slender, tibiae with spurs and slender lateral setae. Wings oval, with rounded base, about 
as long as the abdomen, with microscopic setulae arranged in parallel longitudinal rows. Costa ends 
before the tip of the wing, meeting there the radial sector; subcosta very short, ending either free or in 
Ri ; fork of the media proximad or under the base of the radial sector, petiole hence very short; cubitus 
usually forks, under or proximad of the proximal end of the R-M crossvein, its elongate fork narrow at 
the base then suddenly divergent ; anal vein very stout, rather long, though not reaching the^wing mar- 
gin ; last anal vein long, slender, but incomplete (PI, 6, Fig. I 6). The larvae live in fungi [Armil- 
laria and others). 
The elongate fork of the cubitus, narrow at the base and then suddenly divergent, will distin- 
guish this genus from most of the others; the strong though incomplete anal vein will distinguish it 
from those species of Allodia which have the long forked cubitus. 
Type species : R. fasciata, Meigen. 
Geographical distribution of species : 
1. R. affinis, Winnertz, Verh. Zool.-bot, Ges. Wien, Vol. i3, p. 816 (6) Central Europe. 
(i863). 
2. R. connexa, Winnertz, ibidem, p. 814 (4) (i863j. Central Europe. 
vny. alpina, Strobl, Mitth. Naturw. Ver. Steiermark, 1897, 285 (1898). 
3. R. cristata, Staeger, in Krojer, Naturh. Tidsskr. Vol. 3, p. 254 (20) (Mj'c^- Europe. 
tophila) (1840). 
cristata, Zetterstedt. Dipt. Scand. Vol. 11, p. 4213 (3i) {Mycetophila) (i852); 
Winnertz, Verh. Zool.-bot. Ges. Wien, Vol. i3, p. 819 (9) (i863). 
— R. discoidea, Meigen = fasciata, Meigen. 
4. R. domestica, Meigen, Syst. Beschr. Vol. 6, p. 3o3 (48) {Mycetophila) (i83o). Europe. 
domtstica. Zetterstedt, Dipt. Scand. Vol. 1 1 , p. 4209 (27) (Mycetophila) (i852) ; 
Winnertz, Verh. Zool.-bot. Ges. Wien, Vol. i3, p. 824 (i3) (i863); 
Schiner, Fauna Austr. Vol. 2, p. 466 (7) (1864); Van der Wulp, Dipt. 
Neerland. Vol. i, p. i37 (i) (1877). 
5. R. fasciata, Meigen, Klass. Vol. i, p. 91 (5) [Mycetophila) (1804); Syst. Europe. 
Beschr. Vol. i, p. 267 (16) (Mycetophila) (1818). 
fasciata, Winnertz, Verh. Zool. bot. Ges. Wien, Vol. i3, p. 648 (Myceto- 
phila) (i863); Van der Wulp, Dipt. Neerland. Vol. i, p. i38 (1877). 
discoidea. Meigen, Syst. Beschr. Vol. i, p. 268 (17) [Mycetophila) (1818); 
Zetterstedt, Dipt. Scand. Vol. 11, p. 4213 (32) (Mycetophila) (i852); 
Winnertz, Verh. Zool.-bot. Ges. Wien, Vol. i3, p. 811 ( i)(i863); Schi- 
ner, Fauna Austr. Dipt. Vol. 2, p. 465 (5) (1864). 
maculosa, Zetterstedt (nec Meigen), Ins. Lappon. Dipt, p. 865 (12) p. p. 
(Mycetophila) (i838). 
