124 AN A ceo UNT OF BRITISH FLIES. 



eyes round, ocelli three. Abdomen cylindrical, 7 segments, anal 

 segment and $ genitalia small ; ovipositor short, two small lamellae. 

 The larvae live in fungi and rotten wood. The gnats are found in 

 woods and thickets. 



D. sciari?ia, 'M.g. = M.gilvtpes, Hal. 



This is a slightly ferruginous gnat, covered by whitish hairs. Palpi 

 yellow ; antennae 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 6". valda liegtes jenseits dieser Basis." 



The legs are rather stout and thick, tibic-e darker than femora ; a 

 thick row of small spines on posterior tibiae, the spines are stouter 

 in the hind tibiae ; tarsi brown. Length ij to 2 lin. 



Winnertz found the larv^ in Boletus-scaber and edulis, and in 

 Hydtium repandum ; also in rotten wood. 



The species D. valida is also found in England. It has a 

 chocolate thorax, and is much darker than sciarina. It appears in 

 May. 



Genus. — Fhi^ofiia, 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. 



F. aiistriaca, Wtz. 



Head yellowish-brown. Palpi yellow. Antennse 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. RosslandcX, t. xxiii., 1889. 



