THE MYCETOPHILIDA — Vir 
S. Ruficauda, Mg. 
This is slightly smaller than 7’oma, and can easily be distinguished 
from it by its red abdomen. Dale has taken it from rotting hay and 
straw in the autumn. 
There are a large number of this genus found in England. Win- 
nertz, in his “ Monograph of the Sciarinz,” describes 175 species, 
and those who wish for detailed descriptions, and who intend work- 
ing at this group, should consult it. As it seems a somewhat rare 
work in England I append his method of classifying this genus of 
the Mycetids : 
I. The second long. vein (unterrandader) joins the costa at or beyond the fork 
of the fourth long. vein. (Fig. 19, A, B.) 
A. Wings black or brown. 
1. Antenne black or brown. 
A. Transverse veinlet situated défore the middle of the second long. vein. 
a. The apex of the cubitus (second long. vein) lies nearer to the 
apex of the wing, than does the apex of the lower prong of 
the fork. 
8. The apex of the cubitus (second long. vein) and that of the lower 
prong are equidistant from the apex of the wing. 
y. The apex of the lower prong of fork is nearer the apex of wing 
than the apex of the cubitus. 
B. The transverse veinlet is situated zz the middle of the second long. vein. 
a, 8. and y. as above. 
c. The transverse veinlet is situated beyond the middle of the second long. 
vein. 
a. Only. 
B. Wings yellow. 
1. Antennz black or brown. 
A. Transverse Ph situated defore the middle of the second long. vein. 
a, and B. 
B. anes veinlet situated zz the middle of the second long. vein. 
a. Only. 
2. Antennz yellow. 
A. oe Ook veinlet situated before the middle of the second long. vein. 
. Only. 
II. The sacra long. vein joins the costa before the fork of the fourth long. vein 
(Fig. 19, c.) 
A. Wings black or brown. 
1. Antennz black or brown. 
A. a, B, y, as above. 
B. a, 8, as above. 
c. a, B, y, as above. 
2. 
A. 
B. 
Antenne yellow. 
Y, as above. 
a, B, y, as above. 
B. Wings yellow. 
1. Antennz black or brown. 
A. a as above. 
B. a as above. 
Cc. a, B, as above. 
2. Antenne yellow. 
A. a as above. 
B. a, 8, y, as above. 
c. a, 8, y, as above. 
