CHEILOSIA. 281 



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

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

 and subapical areolels nearly equidistant from, and parallel to, the pos- 

 terior margin ; subapical areolet entire ; axillary lobe distinct ; subcostal 

 and radial veins ending separately in the margin ; transverse prcebrachial 

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

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

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

 the base ; tibiae slightly curved ; hind tarsi long. 



The Cheilosice are generally of rather 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) ; Fb. ; Fin. ; Mg. ; Mq. ; Ztt. ; 

 Lw. ; Ct. ! b. e. 753 ; St. ! ill. 47. \.pr<ecincla, Spl. ; fig. Hrs. xxiv. 

 28. Nigro-cinerea, scutello fulvo, alis macula dimidiata fusca, abdo- 

 mine basifavo. 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. rupestris, Pz. ! fn. lix. 13. Nigro-cenea, alis 

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



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

 and second joints ferruginous ; fourth black. Thorax seneous-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. Alula3 

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

 hairs at the base, icitli black hairs in the middle, and with luteous hairs 

 at the tip. Legs black ; tibia3 towards the base and tarsi beneath 

 ferruginous. 



Generally distributed. (E. S. I.) 



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

 VOL. i. 2 o 



