12. — Body above (head and thorax), metallic green, legs pale. 



Thorax with feeble but evident sinuation. Labrum emarginate. . 17- glaUGUS- 



Thorax distinctly sinuate and narrower. Labrum truncate . . . 18- simillimUE- 



Thorax not sinuate. Labrum truncate 19- nebraskensis- 



Body above black or very slightly blue. Legs usually black. 



20- variabilipes- 



13. — Thorax not sinuate, base evidently broader than apex. Labrum truncate. 



21- vafer- 



Thorax sinuate, hind angles subacute, punctures more evident. Labrum feebly 



emarginate. Color above green 22- flaCCldviS- 



Thorax distinctly sinuate, base not broader than apex. Labrum emarginate. 



23- obsoletus- 



B. — Middle tibia; rf with a pubescent space near the tip. Third joint of antenna: long- 

 er than the fourth. 

 Prothoracic epipleurae very narrow and nearly vertical, thorax obtusely mar- 

 gined 17- 



Prothoracic epipleurae normal, oblique or nearly horizontal, thorax acutely 



margined I . 



— Abdomen either smooth at middle or over its entire surface 2. 



Abdomen sparsely punctured at middle and more densely at sides 3. 



— Abdomen punctured at sides only. Anterior femora of rf subangulate at base. 4. 



Abdomen devoid of punctures 5 • 



— Presternum not margined at tip, feebly punctured or saiooth in front 6. 



Presternum margined at tip, coarsely punctured in front 7. 



— Color bright green, shining 24- SOlitariuS- 



Color dark blue, thorax subopaque, elytra opaque 25- leUCOSCeliS- 



7. — Color green, last ventral segment nearly entirely testaceous 26- prasinUS- 



5. — Presternum feebly margined at sides of tip; episterna with coarse punctures; color 



violet blue, opaque 27- CUlTiatilis- 



Metasternal episterna long, outer side longer than the anterior 8. 



Metasternal episterna short, outer side shorter than the anterior 9. 



Thorax scarsely narrower at base than the elytra, sides not sinuate 10. 



Thorax narrower at base than the elytra, sides sinuate n. 



10. — Body above green (as in sericeits); legs entirely pale 28- augustus- 



Body above bluish black; tibiae and tarsi black 29- VlduUS- 



II. — Male with anterior femora subangulate at base. 



Thorax as long as wide, sides distinctly sinuate 30- sestiniS 



Thorax wider than long, sides not sinuate 31- platydeTUS 



Male with anterior femora simple 32- diffinis 



8. Male with anterior femora toothed at base 33- latlCOlllS 



Male with anterior femora suddenly narrower at base 12 



Male with simple femora 13 



13.— Legs black 31 OrbllS 



Legs testaceous 14 



14. — Thorax very densely punctate 15 



Thorax very sparsely coarsely punctate. 

 Prothorax beneath and abdomen very sparsely punctate 35- Cursor 



