134 AN ACCOUNT OF BRITISH FLIES. 
near its junction with the costa; there is another transverse veinlet 
near this, between second and third veins ; the third longitudinal is 
united with the tip of the costa, and is not forked ; the fork of the 
fourth much beyond the fork of the fifth, which is nearly opposite the 
transverse veinlets ; the sixth extends beyond the fork of the fifth. 
This is figured by Curtis. ‘The metamorphosis is unknown. 
L. Walkeri, Curtis. 
Testaceous ; head tawny ; thorax with three blackish-brown stripes, 
united behind. Palpi and proboscis testaceous; antennz brown, 
yellow at the base. Ocelli brown. Abdomen brown towards the 
tip, posterior borders of the segments darkish, the hypopygium 
golden yellow ; yellowish hairs. Wings grayish at the tip; a brown 
spot at the tip of the prebrachial areolet; veins dark brown. Legs 
testaceous ; tarsi brown and spurs dark brown. Length 5 lin. Mr. 
Dale found this species in September at Glanville Wootton. The 
flight much resembles that of a Plume Moth (Pterophorus). 
SECTION 3.—Sciophiline. 
Body elongated andslender. Head small. Eyes round or oblong. 
Ocelli three, the middle one small. Proboscis short. Palpi 4-jointed, 
curved downwards ; fourth joint long. Antenne 16-jointed. Wings 
broad ; ¢wo cubital areolets ; first longitudinal vein reaching costal in 
some (Sciophila, etc.), much shorter in others (Tetragoneura), wnzted 
to second longitudinal vein near its base by a transverse veinlet; fourth 
vein forked ; fifth usually forked; sixth vein long, but not reaching 
the border of wing. Abdomen with 7 segments. Legs long and 
slender. 
The larve of this section may at once be known from those of 
Mycetophila by their elongated form and different mode of life. They 
do not live as the AZycetophiline \arve inside the fungi, but they 
prefer the surface of the pileus, generally the under side; this they 
cover with a dense net in which they live.* Others live in decaying 
wood, especially when covered with Byssus. The larve form slimy 
tracts, like slugs, and on these they move backwards and forwards 
with great rapidity. The pupz are enclosed in dense cocoons of 
silk. The maggots are usually whitish or yellowish, and often live in 
the same fungi as AZycetophile larve, and hence great mistakes have 
been made in the descriptions of the larve. Theluminosity of these 
* T have also found Sczophzle larve living imside some tree fungi, which they 
had covered with their webs. They crawled out of their tunnels as soon as the 
weather became warmer (March), and crawled about amongst the webs. 
