SYRPHUS. 289 



side at the tip ; under side luteous with large quadrate black spots in 

 the disc. Legs luteous ; femora black at the base ; tarsi ferruginous, 

 with piceous tips ; hind tarsi piceous, ferruginous at the base. 

 Not common. (E.) 



8. arcuatus. Fin. syrph. 43. 11 (ISIG) ; Mg. ; Mq. ; Ztt. Viridi- 

 feneus, antenius jiiceis, abdomine nujro fasciis tribm angustis arcuatis 

 interruptis Jlavis, pedibus luteis femoribus basi nigris, tibiis piceo- 

 chictis. Long. 4-4 1 ; alar. 9-10 lin. 



Head luteous, with a black stripe above the peristoma; vertex 

 yeneous-green. Antennfs piceom. Thorax seneous-green ; scutellum 

 tawny. Wings pale grey ; stigma brown. Alulae white, with yellow 

 borders. Haltercs yellow. Abdomen fusiform, black, adorned toith 

 three transverse yellow spots on each side ; second and third pair Innular ; 

 hind border of the fourth segment yelloio. Legs luteous; femora some- 

 times more or less black ; hind tibia? with piceous bands. 



Not rare. (E.) 



9. coroilae, Fb. e. s. iv. 306. 106 (1792) ; Mg. ; Mq. ; Ztt. ; Lw.— 

 pyrorum, Shr. — olitorius. Fin. Viridi-seneus, antennis fidvis apice et 

 supra piceis, ahdomine nlgro fasciis quatuor latis, prima interrnpta, se- 

 cunda tertiaque emaryinatis pedibusque luteis, femoribus basi nigris. 

 Long. 4-4| ; alar. 8-9 lin. 



Head yellow, with a short black stripe above the peristoma ; vertex 

 black. MaxillcB about one-third of the length of the labrum. Palpi as 

 long as the maxilhe. Antennce tawny, piceous above and at the tips. 

 Thorax a3neous-green, clothed with tawny hairs ; scutellum tawny. 

 Wings colourless ; stigma brownish-tawny. AluUe white. Ilalteres 

 yellow. Abdomen elliptical, clothed with short black hairs, and on 

 each side of the base with long wliitish hairs, adorned with four broad 

 luteous bands ; first band interrupted ; second and third oblique on each 

 side, notched on the hind borders ; disc of the fourth sometimes black. 

 Legs luteous ; femora black towards the base ; tarsi ferruginous, 

 brownish towards the tips. 



Generally distributed. (E. S. I.) 



10. balteatus, Dg. ins. vi. 52. 7 (1783); Mg. ; Mq. ; Lw. ; 



Ztt. — alternatus, Shr. ; Grf. ; Gm. ; llsi. — canabinus, Gm. — nectareus, 

 Fb. ; Pz. ! fn. Ixxxii. 19 ; Flu. ^Eneus, antennis ferrugineis, thorace 

 cano-subtrivittato, abdomine nigro fasciis quatuor latis lineola trans- 

 versa nigra iuscriptis luteis, pedibus fulvis. Long. 5-5^ ; alar. 

 11-12 lin. 



iEneous. Head luteous in front. Antennae ferruginous ; thii'd 

 joint black above ; fourth black. Thorax with thi'ee indistinct hoary 

 stripes ; scutellum dull tawuy. Wings colourless ; veins black ; stigma 

 and halteres tawny. Abdomen black, with four broad variable luteous 

 bands, each including a narrow more or less distinct black band ; tirst 



VOL. I. 3 r 



