SYRPHUS. 289 



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

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

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

 Not common. (E.) 



8. arcuatus, Fin. syrph. 42. 11 (1816); Mg. ; Mq. ; Ztt. Viridi- 

 aeneus, antennis piceis, abdomine nigro fasciis tribus angustis arcuatis 

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

 cinctis. Long. 4-4^ ; alar. 9-1 lin. 



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

 aeneous-green. Antenna piceous. Thorax aeneous-green; scutellum 

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

 borders. Halteres yellow. Abdomen fusiform, black, adorned with 

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

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

 times more or less black ; hind tibia3 with piceous bands. 



Not rare. (E.) 



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

 pyrorum, Shr. olitorius. Fin. Viridi-aeneus, antennis fulvis apice et 

 supra piceis, abdomine nigro fasciis quatuor latis, prima interrupta, se- 

 cunda tertiaque emarginatis pedibusque luteis, femoribus basi nigris. 

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



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

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

 long as the maxillae. Antenna tawny, piceous above and at the tips. 

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

 Wings colourless ; stigma brownish-tawny. Alulae white. Halteres 

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

 each side of the base with long whitish 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. ; Gf. ; Gm. ; Esi. canabinus, Gm. nectareus y 

 Fb. ; Pz. ! fn. Ixxxii. 19 ; Fin. .ZEneus, antennis ferrugineis, thorace 

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

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

 11-12 lin. 



^Eneous. Head luteous in front. Antennae ferruginous ; third 

 joint black above ; fourth black. Thorax with three indistinct hoary 

 stripes ; scutellum dull tawny. 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 bajid ; first 



VOL. i. 2 P 



