124 AN ACCOUNT OF BRITISH FLIES. 
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eyes round, ocelli three. Abdomen cylindrical, 7 segments, anal 
segment and 4 genitalia small ; ovipositor short, two small lamellz. 
The larvee live in fungi and rotten wood. The Boy: are found in 
woods and thickets. 
D. sciarina, Mg.= MM. gilvipes, Hal. 
This is a slightly ferruginous gnat, covered by whitish hairs. Palpi 
yellow ; antennz blackish-brown and thick ; the second joint has a . 
long hair above. Eyes dark and oval; ocelli three in number, 
almost in a straight line. Thorax ferruginous. Wings minutely 
pubescent ; first, second, and third veins reddish-brown : “ Das steile 
Basalstiick der dritten Langsader liegt verder Basis der Gabel der 
vierten Langsader, bei .S. valda liegtes jenseits dieser Basis.” 
The legs are rather stout and thick, tibie darker than femora; a 
thick row of small spines on posterior tibize, the spines are stouter 
in the hind tibiz ; tarsi brown. Length 14 to 2 lin. 
Winnertz found the larve in Soletus-scaber and edulis, and in 
Hydnum repandum ; also in rotten wood. 
The species D. valida is also found in England.. It has a 
chocolate thorax, and is much darker than scéarina. It appears in 
May. 
Grenus.—Pahronia, Wtz. 
This genus has been admirably worked out by Dziedzicki,* and a 
most detailed and true classification has been brought forward: by 
him. After giving the characters of this genus and the two British 
species, I will then give a short account of the method of classifica- 
tion he has adopted. 
Characters of genus: Moderately small, rusty yellow to brown in 
- colour. Head roundish, and segment large. Anterior tarsi always 
longer than the tibia. Wings rather short, costa extends now and 
then beyond the apex of the third longitudinal. The first longitudinal 
vein generally incomplete, sometimes it ends at the costa; fourth 
longitudinal vein with short petiole ; the fifth with a long petiole and 
generally a very small fork; sixth and seventh longitudinal veins 
rudimentary. 
P. austriaca, Wz. 
Head yellowish-brown. Palpi yellow. Antenne brown; first 
segment yellow. Thorax yellow, with three dark brown stripes, 
which are confluent at their origin. Halteres yellow, or whitish- 
yellow. Abdomen of six segments, dark brown above, yellowish- 
* Ent. Hor. Rosslandz, t. xxiii., 1889. 
