13- -V. (.Sphacrophoria) cylindriciis. ^\ in.; chest metallic oli\e green; l)od\' lust 3'ellow ; first 



ring black. /f'PA 



14. .i'. ebliquus. % in. ; chest metallic green ; body black, witii two yellow bands ami eight stripes. 



15. S. geminatus. }( in. ; chest black, with yellow sides; body black, with yellow bands, double- 



spots and stripes ; legs yellow. 



16. 5'. marginatus. fV '"• J chest black, with yellow sides; body black, with yellow bands, spots, ^/^..—.yi^ 



n. 



streaks and edges ; legs yellow. 



TRIODONTA. (POLYDONTA.) (MERODON.) Shanks Fly. \ 



1. T. ciii-vipes. y^ in.; black, with yellow hair; body reddish, with a black triangle above ; _<<^l 



hind shanks thickened. ' '■.'J\ 



2. T. (Mcrodon) bardus. i/^ in.; shaped like curvipes \ chest, first ring and sides of body t \[V; 



covered with yellow hairs. ♦ 



SERICOMYIA. 



1. S. chi-ysotoxoidcs. % in.; black, with yellowish hair on chest, and whitish marks 



on body. 



2. S. militaris. J^ in. ; white antl black. 



(42) 



