THE MYCETOPHILIDA. 145 
broad ; third longitudinal vein forked, arising from the second at 
before one-third of the length; fourth emerges from the third at 
before half the length, near which it is forked ; fifth also forked, hind 
prong very much diverging from the fore one ; sixth extending to the 
hind border. Areolets thirteen. 
These flies can at once be known by their elegant appearance and 
very long antenne. ‘They are fond of nettles in shady woods, and 
are often found resting on palings with the long antennz extended. 
They are the most elegant of all this family. The characters of the 
section are the same as the genus, there being only one genus in this 
section. 
The seven species found in Britain are tabulated by Walker, and 
as this seems the best method I can find I append it below : 
#, Antenne two or three times length of body. 
8. Wings unspotted. 
y. Thorax striped - : : - =  vittata, Mg. 
vy. Thorax not striped - - - = lutea, Mg. 
B88. Wings spotted. 
y. Tips of wings not clouded. 
6. Thorax not striped - - - = stigma, Cutt. 
66. Thorax striped - : : - =  centralis, Mg. 
yy. Tips of wings clouded. 
6. Wings striped between the tip of the 
second and fork of the third vein = 
66. Wings striped before the tip of second 
vein - : - : - = j 
aa. Antenne not longer than body - - 
; angulata, Mg. 
phalerata, Mg. 
Jasctata, Mg. 
M. vittata, Mg. = MM. dorsalis, Cutt. 
This is a tawny species. Yellowish on the ventral surface. Palpi 
yellow. Antenne blackish, yellow at base; as long as body. Thorax 
with three dark reddish stripes ; the median one long, the lateral ones 
short. The abdomen is tawny, with a dark brown dorsal stripe. 
Legs yellow ; tarsi brown. Wings grayish, with yellowish tinge at the 
costal edge. This is a common species, found resting on park 
palings. Length 3 to 4 lin. 
M. fasciata, Mg. 
This is a yellowish species. Thorax with three brown stripes ; 
lateral pair short. Abdomen yellow, with an interrupted dark brown 
dorsal stripe, and a brown band on the anterior border of each seg- 
ment ; hypopygium brown ; ovipositor and lamelle yellow. Head 
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