46 
DIPTERA 
pubescent. Thorax highly arched, ovate, scutellum small, semicircular in outline, metanotum steep. 
Abdomen slender, seven segmented, constricted at the base, usually somewhat clavate, particularly with 
the male, depressed behind, in the male ending in a small forceps (PI, 7, Fig. I), in the female with 
a short ovipositor terminating in two small lamellae. Coxse elongate, somewhat setose; legs long and 
slender, femora ciliated on the flexor surface; tibiae with lateral setse, the fore and middle pairs with two, 
the hind pair with three ranges, the inner row particularly delicate. Wing microscopically setulose, 
somewhat projecting beyond the tip of the abdomen. The costa either ending at the tip of the wing where 
it meets the vein R44-5 or ending some distance before it and produced some distance beyond the tip 
of R_^_l_5; the subcosta sometimes ending in the costa, sometimes ending free and sometimes ending 
in Ri ; cubitus always forking proximad of the media; the anal veins incomplete and usually rather 
short (PI. 4, Fig. 10, II, I 2). The larvae have been found in fungi and in decaying wood. 
Type species : M. marginaia, Meigen, designated by Rondani. 
Geographical distribution of species : 
1. M. aestiva, Van der Wulp, Dipt. Neerland. Vol. i, p. 169 (10) {Scio- 
phila) (1877). 
2. M. affinis, Staeger, in Krojer, Naturh. Tidsskr. Vol. 3, p. 274 (8) 
[Sciophila) (1840). 
affinis. Winnertz, Verh. Zool.-bot. Ges. Wien, Vol. i3, p. 782 (24) {Scio- 
phila) (i863). 
3. M. alacris, Winnertz, ibidem, p. 710(3) {Sciophila) (i863). 
alacris, Schiner, Fauna Austr. Dipt. Vol. 2, p. 443 {H) {Sciophila) {186^). 
4. M. americana, Schiner, Novara Reise, Dipt. p. 14 (9), {Sciophila) (1868). 
5. M. Andreini, Bezzi, Firenze. Bol. Soc. Ent. {Sciophila) (1906). 
6. M. angiilata, Adams, Bui. Univ. Kans. Vol. 2, p. 22 {Sciophila) {igo3). 
7. M. apicalis, Winnertz, Verh. Zool.-bot. Ges. Wien, Vol. i3, p. 729 (23) 
{Sciophila) (i863). 
apicalis, Schiner, Fauna Austr. Dipt. Vol. 2, p. 445 (i5) (Sciophila) (1864); 
Van der Wulp, Dipt. Neerland. Vol. i, p. 170 (12) {Sciophila) (1877). 
8. M. apicalis, de Meijere, Tijdschr. v. Ent. p. 204 {N eoemplieria) (1907). 
9. M. appcndiculata, Loew, Berl. Ent. Zeitschr. Vol. i3, p. i3g (19) 
{Sciophila) (1869). 
10. M. balioptera, Loew, ibidem, p. i36 (i3) [Einpheria) (1869). 
11. M. bicolor, Dziedzicki, Pamietnik Fizyjograf. Vol. 5 (sep.), p. 20 (17), 
pi. 8, f. i5, 16 {Sciophila) (i885). 
— M . bimaculaia, Loew = didyma, Loew. 
12. M. biseriata, Loew, Berl. Ent. Zeitschr. Vol. i3. p. 140 (20) {Scio- 
phila) (1869). 
13. M. brevivittata, Coquillett, Journ. New York Ent. Soc. Vol. i3, p. 67 
{Sciophila) (igo5). 
14. M. bninnea, Dziedzicki, Pamietnik Fizyjograf, Vol. 5 (sep.), p. 16 (12), 
pi. 7, f. 17, 18 {Sciophila) (i885). 
15. M. calcaraia, Coquillett, Invert. Pacifica, Vol. i,p. 19 (Sciophila) (igoS). 
16. M. cinerasceiis, Macquart, Recueil Soc. Sc. Agric. Lille, p. loi (9) 
{Sciophila) (1826). 
cinerascens, Winnertz, Verh. Zool.-bot. Ges. Wien, Vol. i3, p. 722 (14) 
(Sciophila) (i863). 
17. M. cingiilala, Meigen, Klass. Vol. i, p. 102 (5) {Platyiira) (1804); Syst. 
Beschr. Vol. i, p. 247 {Sciophila) (181 8). 
18. M. circiimdata, Staeger, in Krojer, Naturh. Tidsskr. Vol. 3, p. 273 
(7) {Sciophila) (1840). 
circumdata, Winnertz, Verh. Zool.-bot. Ges. Wien, Vol. i3, p. 735 (Sciophila) 
(i863); Schiner, Fauna Austr. Dipt. Vol. 2. p. 445 (17) (Sciophila) (1864). 
Holland. 
Europe. 
Europe. 
South America. 
Africa. 
West United States. 
Europe. 
East Indies. 
Eastern United States. 
United States. 
Eastern Europe. 
North America. 
United States. 
Eastern Europe. 
California. 
Europe. 
Europe. 
Europe. 
