I o 2 AN ACCO UNT OF BRITISH FIIES. 



y (i). Joints of antenna; cylindrical, petio- 

 late or non-petiolate. 

 (ii). Joints of antennre in $ oval, 

 petioles long ; in ? sessile and 

 cylindrical. 8. Sciarince. 



The following are the characters of the more important genera 

 found in Britain : 



Sub-family Sciariiuc.'-' 



7 (i.) I. Wing longer than body ; surface 

 minutely hairy : joints of an- 

 tennas hairy. 



7 (i.) 2. Wing small, shorter than abdomen ; 

 surface minutely hairy. 



7 (i.) 3. Wings and halteres absent. 



7 (ii.) 4. Wing much the same as Sciara, but 

 the fork longer ; basal branch 

 wavy, and upper branch vaulted. 



1 . Sciara. 



2. Brady sia. 



3. Ep id a pus. 



4. Zygoneura. 



Sub-family M] refop/iilitice. t 



A. Three ocelli on the front. 



I. Abdomen with seven segments. 



a. Proboscis not elongated. 



b. Costal extending beyond tip of 



cubitus. 



c. Basal part of cubital vein and 



middle transverse vein equally 

 long. 



d. Auxiliary vein extending to costal. 

 cc. Basal part of cubital vein longer 



than the middle transverse vein. 

 d. Base of fourth hind areolet under 



base of cubital vein. 

 Base of fourth hind areolet nearer 



base of wing than is the base of 



second hind areolet. 

 Costal vein not extending beyond 



the tip of the cubitus. 

 Proboscis elongated. 



dd 



i>l>. 



A}taclinia. 



Leptoiiwrphus. 



Boletina. 



Glaphyroptcra. 

 Gnoriste. 



* Beitrag zu einer Monog. der Sciarinen. Winnertz. Wieii., 1867. 

 t The classifications of the following families is also according to Winnertz. 

 Verh. Zool. Bot. Geo., 1863.) 



