92 
DIPTERA 
47. Genus DOCOSIA, Winnertz 
Docosia. Winnertz, Verh. Zool.-bot. Wien, Vol. i3, p. 802 (27) (i863). 
Characters. — Head oval, flattened in front, placed low upon the thorax, anterior margin of 
the front produced into a triangle whose vertex descends to the base of the antennae; eyes almost circular 
in outline; ocelli three in number, the laterals close to the eye margin, the middle one smaller, imbedded 
in a groove in the middle of the frontal triangle; palpi incurved, four jointed, the first joint small, the 
fourth filiform, longer than the three preceding taken togethei ; antennae in the male arcuate, compressed, 
2 -j- 14 jointed, the basal joints differentiated, the second A^ ith apical setae, flagellar joints cylindrical, 
pubescent. Thorax large, oval, highly arched; scutellum nearly semicircular in outline; metanotum 
high. Abdomen of the male six segmented, cylindrical, with small apical segment and forceps (PI, 7, 
Fig. I I ), in the female with seven segments, sometimes compressed, with short ovipositor and a pair 
of terminal lamellae. Legs strong, the femora, particularly the hind pair, compressed, the tibiae slightly 
clavate. spurred, the fore and middle pair with one range on the flexor surface, the hind pair with two ' 
ranges on the extensor surface and one range on the flexor surface. Wings large, broad, longer than the 
abdomen, oval, with broad rounded base, microscopic s,etulose. Costa extends beyond the tip of the 
radial sector, but does not reach the tip of the wing ; subcosta either ending free or ending in Ri, more 
than half as long as the basal cell R; basal section of the radial sector nearly perpendicular in position, 
its second section in the same line with the R-M crossvein which is longitudinal in position; petiole of 
the media rather short, the fork either proximad or distad of the basal section of the radial sector; base 
of the fork of the cubitus under or proximad of the fork of the media; anal vein delicate, incomplete (PI. 6, 
Fig. 6, 7j. 
The insects are usually found in woods and shrubbery. The larvae live in rotten wood and in fungi. 
Type species : D. sciarina, Meigen. 
1. D 
2. D. 
— D 
— D 
3. D 
4. D 
5. D. 
6. D. 
- D. 
7. D. 
8. D, 
9. D. 
— D 
Geographical distribution of species : 
antennata, Becker, Zeitschr. Hym. u. Dipt. p. 234 (1907). 
dichroa, Loew, Berl. Ent. Zeitschr. Vol i3, p. 148(35) (1869). 
gilvipes. Walker = sciarina, Meigen. 
longicornis, Coquillett, see Syniemna. 
morionella, Mik.Verh. Zool.-bot. Ges. Wien, Vol. 33, p. 25i (i)(i883). 
obsciira, Coquillett, Proc. U. S. Nat. Mus. Vol. 23, p. 697 (1901). 
petiolata, Meunier (fossil), Mon. Mycetoph. etc. p. 162, pi. i3, 
f. 6 (1904). 
sciarina, Meigen, Syst. Beschr. Vol. 6, p. 3oo (40) pp. [Mycetophila) 
(i83o). 
sciarina, Winnertz, Verh. Zool.-bot. Ges. Wien, Vol. i3, p. 804 (i) fi863); 
Schiner, Fauna Austr. Dipt. Vol. 2, p. 463(1) (1864); Van der Wulp, 
Dipt. Neerland. Vol. i, p. i25, pi. 4, f. 11 (1877). 
gilvipes. Walker, Ins. Brit. Dipt. Vol. 3, p. 29 (6) [Leia) {i856). 
sciarina, Meigen, p. p. = valida, Winnertz. 
subiilis, Meunier (fossil), Mon. Mycetoph. etc. p. i63, pi. i3, 
f. 7 (1904). 
valida,'WmneTiz,'Vevh. Zool.-bot. Ges. Wien, Vol. i3, p. 806(2) (i 863). 
valida, Schiner, Fauna Austr. Dipt. Vol. 2, p. 463 (i) (1864). 
sciarina, Meigen, Syst. Beschr. Vol. 6, p. 3oo (40) pp. {Mycetophila) (i83o). 
var. nigrifemur, Strohl, Mitth. Naturw. Ver. Steiermark (1897), p. 285 (1898). 
varia, Meunier (fossil), Mon. Mycetoph. etc. p. i63, pi. 1 3, f. 5 (1904). 
vittata, Coquillett, see Syntemna. 
Algeria. 
Eastern United States, 
Central Europe. 
Eastern United States. 
Baltic amber. 
Europe. 
Baltic amber. 
Europe. 
Baltic amber. 
