366 Mr. F. W. Edwards’ Notes on British Mycetophilidae. 
brown except on the hind margin; hypopygium yellowish (figs. 71 
and 72). Legs rather long and slender; fore tibiae shorter than the 
metatarsi; mid tibiae and metatarsi about equal in length. Coxae 
and femora yellowish ; tibiae rather darker, the hind pair with three 
rows of bristles, spurs dark; tarsi dark brown. The last three 
joints of the front tarsi are (at least after death) bent round into 
an almost equilateral triangle; they and the second joint (especially 
the second) are clothed with a rather longer and denser pube- 
scence than on the tarsi of the other legs, but are without 
spines. Wings slightly tinged with ochreous, but unspotted. 
Halteres yellow. 
. Resembles the male, but front tarsi simple, and sixth abdo- 
minal segment more yellow, like the preceding ones. First, fourth 
and fifth abdominal segments each with two or three long hairs 
at the apex beneath. Length 5°6 mm. 
Lodore, Cumberland, 2 3 (including type, in British 
Museum), | 2 (G.H.V.); Ivybridge, 8. Devon, 1 2 (G.H.V.); 
Three Bridges, Sussex, 1 g (G.H.V.); Brodie, N.B., 2 ¢ 
(J.W.Y.); Wells, Somerset, 19 (C.G.L.); New Forest, 
19 (D.8.); Westhide, (1 ¢) Haugh Wood (1 3) and Stoke 
Wood (1 2), Hereford (J.H.W.). 
B. bisignata, Winn. New Forest, 1 9 (D.8.). 
Ruymosia, Winn. 
The species of this genus are as a rule not very easy to 
distinguish except by genital characters, or in the case of 
gracilipes, signatipes, and spinipes, by the tarsal characters 
of the males. The four species fenestralis, cristata, domestica, 
and macrura differ from the other eight hitherto recognised 
as British in having the pale markings of the abdomen 
situated mainly towards the apices of the segments instead 
of at the bases. These four species may be easily separated 
by an examination of the thorax: cristata has two rows 
of stout spines; fenestralis has three dull reddish brown 
stripes; domestica and macrura have a dark thorax with 
shining greyish pubescence on the shoulders and sides. 
I have seen no British specimen of R. truncata, Winn. 
Walker’s Mycetophila selecta, which Mr. Verrall placed in 
Rhymosia, is quite unrecognisable, and as the type appears 
to be lost it had better be placed in the “ expurgated ” list. 
*R. gracilipes, Dz. Felden, Herts. (A. P.); Newmarket 
(G.H.V.); Ledbury (J.H.W.). 
