a ay aes 
THE MYCETOPHILIDA. 117 
the thorax; the middle one placed before the two lateral ones, 
Pectus testaceous. There are also ferruginous bands on the abdo- 
men. The wings are marked with a tawny hue. ‘The veinlets of 
the pre-brachial areolet forming a right angle, the fore one about 
half the length of the hind one, and nearly as long as the fourth 
longitudinal before its fork. The fork of fifth nearer base of wing 
than fork of the fourth longitudinal vein. Tarsi are brown; legs 
tawny ; tibia covered with long stout spurs ; fore tibize longer than 
fore metatarsi. 
M. stolida, W\k. 
This species is described* as being blackish-brown. The antennz 
are tawny at the base and no longer than the thorax. Palpi tawny. 
Thorax clothed with pale down ; tawny in front, on each side, and 
beneath. Wings gray; transverse veinlets of the prz-brachial areolet 
slightly clouded with brown; veinlets of the prz-brachial areolet 
forming an obtuse angle, the hind one longer than the fore one and 
twice the length of the fourth longitudinal vein before its fork ; fork 
of fifth longitudinal vein further than fork of fourth from the base of 
wing. Halteres testaceous. Legs tawny, short and stout. Tarsi 
blackish ; hind femora with black tips ; fore tibiz longer than fore 
metatarsi. 
M. signata, Mg. =. distigma. 
The life-history of this species seems to be roughly known. 
Stanniust reared it from Boletus edulis, found especially in pine- 
woods. The larvz, according to Osten-Sacken, spin their cocoons 
without leaving the fungi. The cocoon is truncated at one end, 
and this truncature covered with a delicate web, which the fly 
breaks through in escaping. The larvee, as in all of this genus, are 
yellowish-white and stout, the horny head being brown. The zmago 
is yellow to rusty yellow; the thorax with three distinct and dark- 
brown longitudinal stripes, the middle one expanded in front; sides 
of the thorax sometimes brown. Abdomen variable in colour ; 
yellow, the anterior segments marked with brown, and divided 
into two spots by a line down the middle ; the sixth segment and 
¢d organs tawny. Head yellow and brownish in parts; antennze 
brown ; yellow at the base. Legs tawny yellow ; hind femora brown ; 
tarsi brownish. Wings yellowish; tawny veins; a brownish spot on 
* “Ins, Brit.,” vol. iii., p. 15. 
+ Bemerkungen iiber einige Arten Zweiflugl. Gattungen. Macrocera etc. Isis, 
1830. 
