90 TEIE SYRPHIDAE OF OHIO 



58 V. fasciata Macquart. One male, Sandusky; June 17. 



59 V. vesiculosa ( Fabrici us). Two males, Cincinnati, July 3, igoo 

 one female, Cincinnati, June 20, 1901. 



Sericomyia Meigen 



1 Second abiloiuinal segment with two yellow dotsor wholly black; hind femora 



of male considerably thickened militaris 



Second abdominal segment with a median, interrupted fascia; yellow bands 

 narrowly interrupted, the spots not constricted 2 



2 Fourth segment (in the male at least) without yellow cross-bands 



*bifasc!ata Willst. ( N. H. , Pa. , N. Y. ) 



Second, third and fourth abdominal segments each with a median interrupted 

 fascia; the elongate spots thrs formed, oblique, not con.^tricted in the middle 

 chrysotoxoides 



60 S. chrysotoxoides Macquart. One male. Medina; July 22. 



61 S. militaris Walker. One female, Columbus, May 30, "at light." 

 (Fig. 238.) 



Eristalis Latreille 



1 Scutellum of the same color as the thorax, abdomen without light markings, 



wholly shilling; eyes bare (except on uppermost part) with small round 

 dark spots (sometimes disappearing after death); dorsum of thorax in 



female distinctly vittate; arista bare aeneus 



Scutellum more or less yellowish or reddish; eyes distinctly pilose, not so 

 spotted 2 



2 Third segment of abdomen wholly shining, without opaque spots or bands 3 

 Third abdominal segment with opaque markings 5 



3 Pile of eyes not confined to a vertical stripe; the black of second abdominal 



segment at least in part opaque; wings hyaline, femora not thickened. . . 11 



Pile of eyes mostly confined to a vertical stripe; abdomen wholly shining; 



large species 4 



4 Honey-bee like in appearance; moderately pilose; base of tibiae yellowish; 



posterior tarsi blackish; arista nearly bare tenax 



Bumble-bee like in appearance; thorax and abdomem with thick long pile; 

 arista plumose, hind tarsi red f lavipes 



5 Thorax with one or more distinct light dusted transverse bands; front in 



female narrow above q 



Thorax without such transverse bands 6 



6 Thickly pilose species. Third abdominal segment with a posterior opaque 



cross-band; fourth segment wholly shining bastardi 



Moderately pilose species 7 



7 Third abdominal segment with a posterior, velvety black cross-band not 



interrupted in the middle , 8 



Third segment with an interrupted opaque cross-band behind and a similar 

 spot in front; ihe opaque of second segment with a triangular shining spot 

 behind; fourth segment with an oval spot in front dimidiatus 



