CHAPTER VI. 



THE BIBIONID.^. 



This is a small family of usually dark flies. I'he body broad, 

 fairly large, 7-9 segments. Prothorax conspicuous ; scutum of meso- 

 thorax undivided. Wings broad, with no discal areolet. Antennse 

 seldom longer than head in both sexes ; thick, cylindrical, moniliform ; 

 composed of from 8 to 12 joints. Palpi 3 to 5 jointed (apparently 

 only one large joint in Scatopse). Eyes large, round or reniform, 

 often hairy ; contiguous in $, small in ? . Ocelli three. Legs short ; 

 tarsi armed with three pulvilli ; tibiae having often large thick spurs. 

 The following are synonymous with Bibionidcc. 



' Bibionides, Westwood. 



TipularicB viuscci.formes, Mg. 

 Bibionidie = -' Bibionites, Newne. 



Hirteides, Bilb., Zett. 

 ^Scatopsides, Zett. 



The Bibionidae are divided in two sections, and the genera tabulate 

 as follows : 



A. ScATOPSiN^. Posterior basal cell wanting. 



Anterior tibiae of usual shape. Metatarsus of 

 the hind legs shorter than the rest of the 

 tarsal joints together. Legs moderately thick. 

 Third longitudinal not forked - - = 



Anterior tibiae of usual shape. Metatarsus of 

 the hind legs as long or longer than the rest 

 of the tarsal joints together. Legs slender = 



Anterior tibiae with a single spine at the apex = 



EiBiONiN^E. Posterior basal cell present. 



Anterior tibiae with a wreath of spines at apex = 



Anterior tibins with a single spiny process at the 



end --.-...= 



Scatopse. 



Aiiarete. 

 Aspistes. 



Diloplnis. 

 Bibio. 



