242 LAWRENCE BRUNER. 



IS. Body of insect altogether or in part blue, green or brassy (aeneous) 19. 



Body of insect black, with or without yellow face marks 35. 



19. Insect with head and thorax concolorous with abdomen 25. 



Iusect with head and thorax differently colored from abdomen 20. 



20. Head and thorax black, abdomen more or less bronzy, green or blue- • • • 22. 

 Head and thorax greenish 21. 



21. Abdomen ferruginous illinoiensis form bicolor Bob. 



Abdomen with a faint greenish lustre 24. 



22. Abdomen with a brassy tinge 23. 



22. Segments 2-5 with their apices slightly depressed, anal fimbria fulvous. 



siiblilis Sm. 



Abdomen finely roughened, impunctate, apical margins of segments depressed 



and narrowly testaceous, anal fimbria fuscous; cheeks in male subtri- 



augular, the angle opposite the middle of the eye...erytIironii Bob. 



24. Segments 3-5 with thin bands of loug white hairs, anal fimbria bright orange 



fulvous; male with the pubescence on thorax with fulvous tiut, and 

 hair at apex of abdomen yellowish or nearly white. 



subaustralis Ckll. 



25. Abdomen with well-defined hair bands 26. 



Abdomen without well-defined hair bands 32. 



26. General color blue-black ; anal fimbria dirty white, the abdomen of male 



bluish, the apex not densely tufted geranii Bob. 



General color nigro-a'neous, anal fimbria rufo-fuscous Candida Sm. 



General color greenish, with blue and purple reflections 27. 



27. Face of % without yellow markings 31. 



Face of % with whitish yellow markings 28. 



28. Females 29. 



Males 30. 



29. Fovea narrow; clypeus bare, convex, metallic; enclosure rugose; cell III 



long personata Bob. 



Fovea broad; clypeus more pubescent, flatter, not metallic; enclosure less 

 rugose ; cell III shorter zizia* Bob. 



30. Antennas short, joint 3 nearly equalling 4 and 5 together; clypeus rather 



flat, whitish ; sometimes with a whitish dot on each side of face. 



zizire Bob. 



Antennae long, joint 3 no longer than 4 ; clypeus convex, whitish, as well as a 



spot on each side of face personata Bob. 



31. Bobust, enclosure of metathorax narrow, the scutel not purplish. 



polemonii Bob. 

 Slender, enclosure of metathorax broad, the scutel purplish. 



HlinoieuNis Bob. 



32. Abdomen strongly and closely punctured cerasifblii Ckll. 



Abdomen impunctate, shining 33. 



33. Anal fimbria black ; the pubescence of face also black. 



nigrocierula Ckll. 

 Anal fimbria brownish ; the pubescence of face mostly pale 34. 



34. Pubescence of thorax ochraceous, on metatnorax black <*a*rulea Sm. 



Pubescence of thorax white, the few black hairs inconspicuous. 



territa Ckll. 



