180 GEO. H. HORN, M. i). 



Series A. 



Elytra entirely unicolorous, either bright metallic blue, dull violaceous, or nearly 



black, margin never pale 2. 



Elytra bicolored, either with a pale margin or with the disc vittate (in fimbriatu 



sometimes entirely ]iale) 6. 



■2. — Body never entirely black beneath 3. 



Body and legs entirely black 5. 



3.— Elytra brilliant blue or green, thorax smooth, body beneath entirely pale. 



1. gibbitar!«a. 

 Elytra dull violaceous or greenish black, thorax more or less punctate, body 



beneath in greater part dark 4. 



4. — Elytral punctures distinct, often coarse and close; thorax at least bordered 



with pale 4. viaiii^. 



Elytral punctures obsolete, thorax black 5. eonciiina. 



5. — Surface rather shining, punctures very distinct 6. vioIaeen!>«. 



Surface dull black, impunctate 7. lugeiis. 



6. — Elytra violaceous or bluish, margin pale. 



Thorax and elytra coarsely and closely punctate 3. tlioraciea. 



Thorax and elytra indistinctly punctate, elytra brilliant violaceous. 



2. flavocyaiiea. 

 Elytra distinctly punctured, a short yellow vitta just within the hu- 

 meral umbone var. brevilineata. 



Elytra entirely testaceous, vittate or maculate. 



Elytra entirely testaceous flmbriata var. 



Elytra blue, green or violaceous, disc with a yellow vitta, usually in form 



of !; sometimes entire 8. interjeftionis. 



Elytra yellow, with dark vittse 7. 



Elytra brown, with large pale spots 17. Jacobiaiia. 



7. — Three vittse on each elytron, sutural median and submarginal.. 8. 



Two vittffi, sutural and median 9. 



8.- -Form obloug oval, anterior angles of thorax not dentiform. 



Body beneath and legs black, elytral punctuation very indistinct, the 



vittse blue 10. a^inula,. 



Body beneath (except metasternum) and legs pale; elytral punctuation 



distinct and moderately close, vittse piceous 9. fiiubriala. 



Form oval, anterior angles of thorax dentiform. 



Elytral vittse broad, antennte piceous 11. petaurii^ta. 



Elytral vittse very narrow, the three basal and the terminal joint of an- 

 tennae pale 12. teiiiiiliucata. 



9. — Elongate obloug; elytra, especially posteriorly, asperate punctate. 



16. loiigula. 



Oval, or oblong oval, elytra inipresso-punctate 10. 



10.--Antennge with fourth joint distinctly longer than third 13. iiliiiiata. 



AntenuiE with joints 3 and 4 equal. 



Elytra coarsely and closely punctate 14. Horili. 



Elytra sparsely, finely and indistinctly punctate 15. lUkei. 



