116 AN ACCOUNT OF BRITISH FLIES. 
(fourth) a little before middle of wing. It forms an angle with the 
transverse veinlet, and then passes straight to the margin, a little in 
front of the tip of the wing. The sub-apical (fourth longitudinal | ; 
vein) is forked. The remaining vein—the sub-anal (fifth longitudinal 
vein)—is forked in some; in others simple. Anal (sixth longitudinal 
vein) does not reach margin, and varies in length. ‘There is also a 
small veinlet (humeral) near the base of wing. Base of fourth 
hind areolet nearly in a transverse line with that of the second 
hind areolet. Legs slender ; cox long; the four hind tibize spinose, 
with two long spurs; only one spur on fore tibize and spines scanty. 
Tarsi longer in fore legs than hind. The curious formation of the 
legs, which are adapted to their hopping and skipping move- 
ments, are very characteristic, and resemble the legs of Pudex. 
The larve of this genus have been mentioned in the general 
account, and so we can now pass on to some of the species found in 
this genus. The genus, as taken by Walker, included about fifty-one 
species; but the old genus Mycefophi/a is usually divided into 
several distinct genera or, more correctly, sub-genera, The differ- 
ences between J/ycefophila and Rymosia and L£xechia are, for 
instance, very slight, and although they are separated off as distinct 
genera, in my opinion the characters are not sufficiently marked to 
justify them being raised to that position. 
Fic. 23.—Mycetophila tingulum,* Mg. 
M. striata, W\k. 
M. semicincta, Mg. 
M. cunctans, Wied. 
|M. rufa, Macq. 
M. punctata, Mg. = + 
_ This is a large and common species (2} lin. long, 4-5 lin. alar). 
The general colour tawny. There are three large reddish spots on 
* MM. cingulum,Mg.  Thisis a testaceous species, with tawny abdomen. Wings. 
also tawny in front, marked as in Fig. 23. Notverycommon. Length 1}to2 lin. 
a 
