264 SYRPHID.E. 



pressed, seated on a little tubercle of the fore front, jointly as long as the 

 breadth of the head ; first, second, and third joints almost equally long, 

 obliquely truncated ; first and second beset with slender bristles ; first 

 cylindrical, subclavate ; second somewhat compressed, widened above ; 

 third compressed, narrower in front ; fourth very minute, seated near the 

 base of the third; fifth setiform, bare or pubescent, hardly longer than 

 the third. Thorax almost quadrate, slightly hairy ; scutellum semicir- 

 cular. Wings lanceolate, finely pubescent, diverging, longer than the 

 body ; subapical areolet entire ; axillary lobe distinct ; subcostal and 

 radial veins ending separately in the margin. Abdomen long-elliptical, 

 convex, broader than the thorax, pubescent or quite bare, with a rim 

 on each side. Femora tapering to the tips ; tibia? clavate, curved, com- 

 pressed towards the tips. Male. Eyes almost contiguous. Fern. Eyes 

 somewhat remote. 



These flies are usually black and bright yellow. The larvae are 

 said to live on the roots of plants. The species may be thus di- 

 vided : 



a. Eyes bare. Species 1-5. 



a a. Eyes pubescent. Species 6. 



1. bicinctum, L. fn. 1805 (1761); Dg. ; Fb. ; Shr. ; Gm. ; 

 Dnv. ; Pz. ; Mg. ; LI. ; Fin. ; Mq. ; Ztt. ; Rein. ; Lw. ; Ct. tricinctum, 

 Rdn. Nigrum, thorace flavo-bivittato, alis costa ferruginea apice fusca, 

 abdomine fasciis arcuatis duabus et segmentorum marginibus posticis 

 pedibusque flavis, femoribus anterioribus basi posticisque nigris, tarsis 

 ferrugineis. Long. 5 ; alar. 1 lin. 



Black. Epistoma luteous, with a broad black stripe. Antenna? 

 luteous at the tips. Thorax with four yellow stripes ; the inner pair 

 on the fore part, indistinct ; the outer pair interrupted. Wings ferru- 

 ginous at the base, and along the fore border till near half the length, 

 brown from thence almost to the tips. Abdomen with two arcJied broad 

 bands, and the hind borders of the segments yellow. Legs yellow ; an- 

 terior femora black at the base ; hind femora black with tawny tips ; tarsi 

 ferruginous. Fern. Vertex with a yellow spot on each side. 



Generally distributed. (E. S. I.) 



2. festivum, L. fn. ii. 1812 (1761); Gf. ; &y\.bipunctatum, 

 Mir. arcuatum, Fb. ; Shr. ; Gm. ; Gf. ; Mg. ; LI. ; Fin. ; Mq. ; 

 Ztt.; Rdn.; Lw. ; Ct. ; Grn. ; fig. Sch. ic. Ixxiii. 8 ; Hhs. xv. 16. 

 Nigrum, capite plemmque flavo, thorace vittis duabus scutellique mar- 

 gine flavis, alis subcinereis ad costam luteis, abdomine fasciis quatuor 

 interrupts apiceque flavis vel luteis, pedibus luteis. Long. 5-5 i ; alar. 

 10-11 lin. 



Black, Head white behind ; epistoma with a broad black stripe. 

 Antennee luteous towards the tips. Thorax with four yellow stripes ; 

 the inner pair on the fore part, indistinct ; the outer pair interrupted. 

 Wings slightly tinged with grey; a diffused luteous stripe extends along 



