134 BIBIONIDiE. 



Family IV. BIBIONID^. 



Hirteides, Bilb. ; Zett. Bibionites, Newm. Bibionides, Westw. Tipu- 

 larias nmscceformes p., IMeig. Scatopsides, Zett. 



Corpus magnum aut mediocre. Ocelli tres. Prothorax conspicmis. 



Mesotliorac'is scutum indivisum. Alee satlalse; areola discalis nulla. 



Body large, of middling or of very small size. Ocelli three. Pro- 

 thorax conspicuous. Scutum of the mesothorax imdivided. Wings mo- 

 derately broad, with no discal areolet. 



The Scatopsides are united to the BlhionidcR, and this family 

 will thus contain two distinct groups, each of which contains two 

 British genera. 



f nine-jointed ........ BiBio. 



riong. . , DiLOPHUs. 

 I Leleven-jointed. Palpi \ 



Antennae -j (.veiy short . Scatopse. 



^capitate Aspistes. 



Genus I. BIBIO. 



BiBio, Geoffr. H. N. Ins. (1764) ; Latr. ; Oliv. ; Meig. ; Mcq. ; Curt. ; 

 Loew ; Westw. Tipula p., L. ; F. Sp. Ins. ; D. G. ; Gmel. ; Scbr. ; 

 Panz. Hirtea p., F. E. S. ; Meig. Kl. Zw. ; Zett. 



Corpus validum, elongatum, magnum aut mediocre. Ocelli tres. 

 Labrum breve, trigonum. Lingua lanceolata. Labium bilobatum, 

 hirtissimum.* Palpi 5-articulati, pilosi ; articulus primus brevissimus ; 

 secundus linearis, tertio longior ; tertius et quartus subclavati ; quar- 

 tus tertio brevior ; quintus linearis, quarto longior et multo gracilior. 

 Antenna3 9-articulat8e, breves, submoniliformes, porrecto; ; articuli 

 primus et secundus sublineares, julosi; tertius et sequentes transver- 

 si ; nonus rotundatus. Thorax subovatus, valde convexus. AL'b sat 

 latfe, non elongatee. Halteres longi. Abdomen 9-annulatura, tliorace 

 multo longius. Pedes validi ; femora et tibiss canaliculata ; tibiae 

 calcaribus duabus apicalibus, anticne spina longa robusta apicali ; 

 tarsi non elongati. Mas. Caput latiim, rotundatuni. Oculi maximi, 

 supra conjuncti. Abdomen apice obtusura. Tibia3 posticaj clavatae. 

 Fcem. Caput ovatum, angustum. Ocelli parvi, remoti. Abdomen 

 apice acuminatum. 



Body stout, elongated, large or of middle size. Ocelli three, approx- 

 imate. Labrum short, triangular, membranous and pubescent at the 

 apex. Lingua lanceolate, dihitcd at the base, membranous and pu- 

 bescent at tlic apex, as long as the labrum. Labium shorter than the 

 head, membranous, bilobed, very hairy. Palpi five-jointcd, })ilose ; 

 first joint very short ; second linear, longer than the third ; third and 



