CIIEILOSIA. 281 



length. Thorax oval, convex, hairy ; scutcUum semicircular. Wings 

 lanceolate, finely pubescent, incumbent and parallel in repose ; disced 

 and siibapical areolets nearly equidistant from, and parallel to, tlie pos- 

 terior margin ; snhapical areolet entire ; axillary lohe distinct ; subcostal 

 and radial veins ending separately in the margin ; transverse prcehrucldal 

 vein placed before the middle of the discal areolet. Haltercs uncovered. 

 Abdomen with only five or six segments apparent. Legs slender ; hind 

 legs longer than the anterior ; anterior femora a little thickened at 

 the base ; tibire slightly curved ; hind tarsi long. 



The Cheilosm are generally of rathci- large size ; they frequent 

 meadows and woods. The species may be thus grouped : — 



a. Wings spotted. Species 1, 2. 

 a a. Wings unspotted. 

 b. Abdomen unspotted. 



c. Body very hairy. Species 3-5. 

 c c. Body slightly hairy. Species 6-16. 

 b b. Abdomen spotted. Species 17. 



1. lucorum, L. fn. ii. 1803 (1761) ; Fl). ; Fin. ; Mg. ; Mq. ; Ztt. ; 

 Lw. ; Ct. ! b. e. 753 ; St. ! ill. 47. I.~prrsci7icta, Spl. ; tig. lirs. xxiv. 

 28. NigTO-cinerea, scutello fidvo, alls macula dimidiata fusca, abdo- 

 tnine basiflavo. Long. 5 ; alar. 12 lin. 



Black. Head tawny on the crown, whitish with a black stripe in 

 front, clothed with tawny hairs and with white hairs beneath. Thorax 

 dark green, clothed with ferruginous hairs ; scutellum tawny. Wings 

 colourless, with a very large brown spot extending from the fore border 

 to the disc. Alula; grey. Halteres brown. Abdomen yellow towards 

 the base, chalybeous towards the tip, clothed with hoary hairs and in 

 the middle with black hairs. Femora at the tips and tibia; towards 

 the base yellow. 



Generally distributed ; inhabits woods. (E. S. I.) 



2. cestracea, L. s. n. ii. 985. 34 (1767) ; Dg. ; Fb. ; LI. ; Fin. ; 

 Mg. ; Mq. ; Lw. ; Ztt. — rnpestris, Pz. ! fn. lix. 13. Nig?'o-(enea, a\is 

 macula dimidiata fusca. Long. 5-5^; alar. 11-12 lin. 



Black, clothed with short pale tawny hairs. Antennae pitchy ; first 

 and second joints ferruginous ; fourth black. Thorax reneous-black, 

 clothed with long hoary hairs beneath and on the scutellum. Wings 

 pale grey, colourless towards the base, with a large pale brown spot 

 extending from near the middle of the fore border to the disc. Alula; 

 white. Halteres yellow, with brown tips. Abdomen clothed ?rith hoary 

 hairs at the base, with black hairs in the middle, and with luleous hairs 

 at the tip. Legs black ; tibiae towards the base and tarsi beueatii 

 ferruginous. 



Generally distributed. (E. S. I.) 



3. grossa, Fin. syrph. 53. 7 (1816); Mg. ; Mq. ; Ztt. Nigro- 



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