BOLETINA. 33 



with the cubital by a veinlet which is a little beyond the base of the 

 subnpical vein ; cubital joining the costal near the tip of the latter ; 

 subapical and subanal slight, the former forked near its base. Halteres 

 testaceous, with black knobs. Abdomen testaceous at the tip. Legs 

 testaceous ; trochanters partly black ; spurs long ; tarsi blackish, minutely 

 setose beneath. 

 Bare. (E.) 



Genus V. BOLETINA. 



BOLETINA, Stseg. D. D. (1840) ; Zett. MycetopkUa p., Meig. Leia p., 

 Meig. LeptomorpJius p., Walk. 



Corpus gracile. Oculi ovati. Ocelli tres, intermedius minimus. Palpi 

 arcuati, 4-articulati. Antenna? graciles, filiformes, subcompressa3, 

 fere nudse, 16-articulatfe. Thorax brevis. ^/^satlatae; vena sub- 

 costalis costce dimidium fere attingens, cubitalis e venulis transversis 

 areolcR prtebrachialis orta. Abdomen longum, gracile, basim versus 

 subcontractum. Pedes graciles. 



Body slender. Eyes oval. Ocelli 3, the middle one very small. 

 Proboscis slightly elongated. Palpi curved, four-jointed. Antennae 

 slender, filiform, slightly compressed, nearly bare, sixteen-jointed. 

 Thorax short. Wings moderately broad ; costal vein ending at hardly 

 in front of the tip of the wing ; subcostal nearly half tlie length of the 

 wing ; radial ending at a little before five-sixths of the length; cubital 

 joining the tip of the costal, springing from the angle formed by the 

 transverse veinlets which close the praebrachial areolet ; subapical and 

 subanal veins forked or simple; anal vein distinct. Halteres rather 

 short. Abdomen long and slender^ somewhat straitened towards the 

 base. Legs slender, rather long; tibiae beset by a few very minute 

 bristles ; spurs moderately long. Male. Antennae about twice the 

 length of the thorax. Abdomen cylindrical. Fern. Antennas hardly 

 longer than the thorax. Abdomen subfusiibrm. 



The Boletina frequent woods, and in their habits much resemble 

 the Mycetophila, but differ in their more slender structure, and in 

 the greater length of the subcostal vein. Gnoriste is nearly allied 

 to them, but is distinguished by the length of its proboscis. 

 Synopsis of the species : 



a. Subapical vein and subanal vein forked. 



b. Porks of the veins at an equal distance from the base of the wing. 

 b b. Fork of the subanal vein nearer than the fork of the subapical 



to the base of the wing. Species 1-3. 

 b b b. Pork of the subanal vein further than the fork of the subapical 



from the base of the wing. Species 4. 

 a a. Subapical vein not forked. Species 5. 

 a a a. Subapical vein and subanal vein not forked. 



VOL. IV. F 



