SYRPiirs, 71 



4. Xo facial black stripe, but central bump 



may be black 5. 



A blaclc facial stripe (brown and very narrow 



in oj)imius) 7. 



i). Abdominal bands divided into three pairs 



of spots (rneifrons, lirun.. p. 7"). 



Abdominal bands entire (in serarius, the 

 pair of spots on the :*nd seg-ment often 

 ujiited, forming a narrow band still 



narrower in middle) 6. 



(3. Under side of 3rd antennal joint always 



moro or less orange (abdominal bands [p. 76. 



yellow) torvus, Ost.-Sack., 



Aiitennoe wholly black (/riseocmctus, sp. n., 



7. Abdomen with o pairs of spots 8. [p. 77. 



Abdomen with 2nd and ;3rd abdominal 



bands entire 9. 



8. Abdominal spots large, sub-lunate opimins, Walk., p. 78. 



Abdominal spots narrower, linear reDiotus, sp. u., p. 78. 



9. Vertex brilliant shining violet; face dull 



yellowish with small central bump shining 

 black; anterior femora practically all 

 yellow, at most extreme base black ; [p. 71). 



hind legs blackish transversus, Brun., 



Vertex black ; face orange-brown with 

 broad black stripe ; anterior femora black 

 on basal third to half; hind legs apparently 

 withmoreblack surface tiian in ^/•rtJj.si'frsMS orsiui, Walk., p. 80. 



10. Thoraxwith obvious grey or bronze stripes, 



at least on anterior margin 11. 



Thorax without obvious grey stripes, at 

 most, traces of such in individuals 12. [p. 81. 



11. Thoracic stripes five, bronze-coloured .... quinquevittatus, sp. ii., 

 Thoracic stripes two, greyish, sometimes [p. 82. 



indistinct haltcatus, De Cieer, 



12. Abdomen rather conspicuously narrow. . . . ciitctillm, Zett., p, 84. 

 Abdomen of usual ovate shape T'l 



13. Abdomen with three pairs of spots; no 



entire transver.se baud 14. 



A pair of spots on 2ud segment; 2nd and 



.">rd abdominal bands entire l''^- 



\\\ tlirce jibdominal bands entire* 18. 



14. Abdominal spots clearly passing over side 



margins; genitalia in S very largo ; scu- 



tellum yellow-haired corolUr, Fabr., p. 80. 



Abdominal spots clear of side margins ; 

 genitalia in S of normal size; scutellum 

 black-haired Iimiijcr, Meig., p. 80. 



15. No facial black stripe IJJ. 



A black facial stripe 17. 



* .S. covfrahr, Wicd., is included under tliis bending, as tlio mnrkinps of 

 the 2nd ivbdoniinal setjuicut generally consist of a pair of elongate, tr.insverae 

 spots broadly united at their inner ends, tlins forming im entire hand ; but in 

 some specimens they nro just separated. Wiedemann deserilied lliem ns » 

 psiir of contiguous spots, wliicli is im excellent definition. 



