| 1. Body, length |
| 14-5 mm 25-6 mm 76-7 mm 197-8 mm 218-9 mm 209-10 mm 1610-11 mm 1411-12 mm 1212-13 mm 1113-14 mm 1014-15 mm 715-16 mm 516-17 mm 217-18 mm |
| 2. Potential distribution |
| 2AL 4AZ 2Ak 8CA 8CO 4CT 4Canada 4DE 2FL 2GA 2IA 2ID 2IL 2IN 2KS 4MA 2MD 2ME 2MI 2MN 2MS 4MT 2NC 6ND 4NE 4NH 4NJ 10NM 2NV 4NY 8Northern Mexico 2OH 6OK 4OR 4PA 2RI 2SC 4SD 2TN 8TX 6UT 2VA 4VT 2WA 4WI 4WV 6WY |
| 3. Abdomen, elytra, surface color |
| 4Dark metallic blue 4Nearly black 8Orange 2Pale blue or pale green 1Red 2Reddish brown 4Yellow 17purplish black |
| 4. Abdomen, elytra, presence of bands |
| 2No, and maculation near middle of each elytron, which takes one half of the width of elytron 2No, with maculation near middle of each elytron, which is small, obliquely transverse and/or orangish 18Yes |
| 5. Abdomen, elytra, first band |
| 6Complete to sutural margin 12Large, length less than 2 times width 6Maculation, with spots and/or not straight shape 4None 4Oblique, not perpendicular to the elytral margin 14Perpendicular to elytral margin 4Thin, length more than 2 times width |
| 6. Abdomen, elytra, second band |
| 10Complete to sutural margin 6Interrupted before central margin even tiny 10Large, length less than 2 times width 4Maculation, with spots and/or not straight shape 2None 2Oblique, not perpendicular to the elytral margin 14Perpendicular to elytral margin 4Thin, length more than 2 times width 2With a strong constriction, sometimes almost until the separation of the band into two parts 2With feeble constriction, just a little deformation, not until the separation of the band into two parts |
| 7. Abdomen, elytra, third band |
| 6Complete to sutural margin 2Interrupted before sutural margin 4Large, length less than 2 times width 2Maculation, with spots and/or not straight shape 6None 8Oblique, not perpendicular to the elytral margin 10Perpendicular to elytral margin 4Thin, length more than 2 times width 2Up to the second band level |
| 8. Abdomen, elytra, tips |
| 4Emarginate or pointed 8Rounded 4Truncate |
| 9. Length of the galea |
| 181/2 of the distance between the eyes across the front 2About as long as the distance between the eyes across the front 2Disctinctly longer than the distance between the eyes across the front |
| 10. Thorax, pronotum, color of hairs |
| 2Bright orange 1Dark red |
| 11. Thorax, pronotum, shape of hairs |
| 6Dense, obscure surface from view 16Moderatly dense, do not obscure the surface from view |
| 12. Abdomen, elytra, margin, where elytra join, entirely dark blue |
| 20No 6Yes |
| 13. Abdomen, Elytra, percentage covered by bands |
| 2About 50% 3Under 50% 3over 50% 2under 20% |
| 14. Abdomen, Elytra, band color |
| 15. Sex |
| 11Female, with rim of fifth sternite always straight or lightly concave and the sixth sternite with width longer than length 11Male,with rim of the fifth sternite always strongly concave and the sixth sternite with length longer than width |