E1USTALIS. 245 



brownish at the base ; alula? grey. Halteres piceous. Legs black ; 

 tibia white towards the base; tarsi piceous. Male. Abdomen ferru- 

 ginous, clothed with tawny hairs; disc black towards the base. Fern. 

 Wings slightly clouded with brown beneath the middle of the costa. 

 Abdomen black, clothed with black hairs ; tip clothed with whitish 

 hairs. Var. /3, mas. Thorax clothed with blackish-brown hairs. Ab- 

 domen black, with two large tawny spots on each side. Var. y, fcem. 

 Tip of the abdomen clothed with tawny hairs. 

 Generally distributed. (E. S. I.) 



7. similis, Fin. d. s. syrph. 25.16(1816); Mg. ; Mq.j Lw.; Ztt. 

 pertinax ? Spl. Piceus, scutello ferrugineo, abdomine nigro segmen- 

 torum marginibus maculisque duabus lateralibus bad fulvis, pedibus ni- 

 gris, tibiis basi tar sisqueanterioribus fulvis. Long. 6-7 ; alar. 12-14 lin. 



Piceous, clothed with tawny hairs. Head clothed on the crown and 

 above the antennae with black hairs. Antenna? black. Disc of the 

 thorax clothed with ferruginous hairs ; scutellum ferruginous. Wings 

 colourless, slightly clouded with brown beneath the middle of the costa. 

 Halteres tawny. Abdomen black, with a very large triangular tawny 

 spot on each side beneath the fore border ; hind borders of the segments 

 tawny. Legs black ; tibia? towards the base, knees and anterior tarsi 

 tawny. Var. /3. Wings quite colourless. Var. y. Wings much clouded 

 with brown. 



Generally distributed. (E.S.I.) 



8. nemorum, L. s.n.ii. 984.30 (1767); Em.; Gf. ; Fb.; Shr.; 

 Ros. ; Gm. ; LI. ; Mg. : Mq. ; Lw, ; Ztt. arbustorum p., Fin. Pi- 

 ceus, fulvo-hirtus, scutello ferrugineo, abdomine nigro, segmentorum 

 marginibus posticis maculisque duabus lateralibus basi fulvis, pedibus 

 nigris, tibiis basi tarsisque fulvis, tarsis posticis piceis. Long. 5-6 ; 

 alar. 10-1 2 lin. 



Piceous, clothed with tawny hairs. Head covered with whitish down ; 

 a black scapula above the peristoma ; crown clothed with black hairs. 

 Antenna? black ; fourth joint tawny. Scutellum ferruginous. Wings 

 colourless, very slightly clouded with brown beneath the middle of the 

 costa. Halteres tawny. Abdomen black, with a large tawny triangu- 

 lar spot on each side near the base ; hind borders of the segments 

 tawny. Legs black ; tibia? towards the base and anterior tarsi tawny ; 

 hind tarsi piceous, ferruginous beneath. Var. /3. Wings quite colourless. 

 Var. y. Anterior tibia? tawny. 



Generally distributed. (E. S. I.) 



9. arbustorum, s. i. ii. 424. 15 (1775); Gm.; Shr.; RsL; Pz.; 

 LI. ; Fin. ; Mg. ; Mq. ; Lw. ; Ztt. horticola var., Dg. fig. Sch. i. e. 

 Ixxxi. 1 . Piceus, fulvo-hirtus, thorace cinereo-subvittato, scutello ferru- 

 gineo, segmentorum marginibus posticis maculisque duabus lateralibus 

 fulvis, pedibus nigris, tarsis intermediis tibiisque basi flavis. Long 5- 

 5; alar. 11-12 lin. 





