3 -) i^^ 



138. 

 BIBIO VENOSUS. 



Order Diptera. Fam. Tipulidae Lat.^ Leach. 



Type of the Genus Tipula hortulana Linn. 



BiBio Geoff., Ol'w., Lat., Meig. — Hirtea Fab., Meig., Panz. — Tipula 

 Linn. 



AntenncE porrected, not very remote, inserted a little before the 

 eyes, nearly alike in both sexes, submoniliform, 9-jointed, 2 first 

 joints pilose, forming a scape for the remainder, which are trans- 

 verse, terminal joint rounded (fig. 3). 



Labrum short, triangular, membranous and pubescent at the 

 apex (b). 



Tongue as long as the labrum, dilated at the base, lanceolate, 

 membranous at the apex and pubescent (c). 

 Mandibles and Maxillce none. 



Palpi 2, exserted, incurved, pilose, 5-jointed, basal joint minute, 

 2nd long linear, 3rd robust clavate, 4th smaller clavate, 5th slen- 

 der, elongate ovate ( 1 * f) . 



Lip shorter than the head, membranous, very hairy bilobed (g) . 

 Male. Head large. Eyes contiguous. Ocelli 3 coH/ig-MOMs (2 *). — 

 Female. Head small, ovate. Eyes remote, lateral. Ocelli 3 con- 

 tiguous (2). Thorax globose. Scutellum sma//. Abdomen o/"</ie 

 males elongate linear, emarginate at the apex, of the females ovate, 

 frequently elevated down the back. Wings incumbent, with about 

 12 cells some of which are imperfect, nervures more distinct in the 

 females than in the males. Halteres distinct. Legs alike in both 

 sexes, hinder the longest, the thighs being very long and subclavate : 

 anterior the most robust, the thighs incrassated. Tibiae short, mu- 

 cronated. Tarsi o-jointed, basal joint the longest. Claws distinct. 

 Pulvilli trilobed (8, afore leg). 

 Obs. The dissections are from a male, excepting fig. 2, the head of a 

 female in profile. 



Venosus Meig. Syst. Besch. v. \. p. 3)5. n. 10. 



Male. Black, shining, covered with short pale yellow pubescence. 

 Eyes and line dividing the collar and dorsolum ochraceous, the 

 former black in the middle. Wings hyaline iridescent. Stigma, 

 costal and subcostal nervures piceous, the others fuscous. 

 Female. Eyes cinereous. Wings stained yellowish fuscous, 

 darkest round the nervures and posterior margin. Nervures 

 darker than in the male. 



In the Cabinets of Mr. Stephens and the Author. 



