CHLAENIUS, Bon. 



Dr. G. H. Horn's Revision Trans. Am. Ent. Soc. V, 253-276. 

 A. — Middle tibiae ■-{' without pubescent space at tip. Third joint of antennae not long- 

 er than the fourth, (except in 1 and 2). 

 Abdomen impunctured and glabrous. 



Thorax narrower at base than the elytra, sides distinctly sinuate, basal impress- 

 ions deep, surface irregularly punctured 1. validllS- 



Thorax as broad at base as the elytra, sides not sinuate, basal impressions very 



feeble, surface densely punctured 2- tOUlelltOSUS 



Abdomen sparsely punctured and pubescent over the entire surface I 



I. — Presternum not margined at tip, thorax not sinuate 2 



Presternum margined at tip, thorax distinctly sinuate 3 



2. — Thorax with coarse punctures very irregularly disposed. Legs black 4 



Thorax more finely and densely punctured, subopaque. Legs red 5 



4. — Presternum punctured between the coxi-e, elytra coarsely and rather densely 



punctured . Thorax as wide as base of elytra 6. 



Presternum impunctured, elytra finely punctured, thorax narrower 7, 



6. — Marginal line of elytra forming an angle with the basal line, margin of thorax 



not thickened 3. purpuricolllS- 



Marginal line of elytra regularly curved at base, margin of thorax thickened, 

 especially toward the base. 

 Elytral intervals alternately more convex, butsimilarlypunctureed. \. altematus- 



Elytral intervals equal £. nigef- 



Stria; of elytra broken into short lines Q. intelTUptuS- 



7. — Head greenish, thorax feebly bronzed, body and elytra black 7- harpalinUS- 



5. — Thorax narrower at apex than at base, and with narrow red margin. 



8- impunctifrons- 



3. — Thorax with impunctured Spaces or unequally punctured. 



Mandibles elongate, deflexed; thorax with very coarse, deeply impressed but 



sparsely placed punctures 9- maxilloSUS • 



Mandibles normal in form. 



Epipleura; pale, thorax distinctly sinuate 10- cirCUHlcillctUS- 



Epipleuroe concolorous, thorax not sinuate 11. tesailUS- 



Thorax equally punctured. Epipleurne dard 8. 



8. — Elytral intervals finely muricate. Prothocacic episternum coarsely punctured. 



12- pennsylvanicus- 



Elytral intervals finely and sparsely punctured and not distinctly impressed. ... 9. 



9. — Prothoracic episterna coarsely punctured 10. 



Prothoracic episterna very obsoletely punctured It. 



10. —Head and thorax green, varying to blue, shining. 

 Labrum emarginate. 



Body above green, elytra rather densely punctulate 13- floridailUS- 



" bicolored, elytra very obsoletely and sparsely punctulate. 1£. brevilabris 



Labrum truncate 15- tricolor- 



Head and thorax coppery bronze, thorax subopaqe 16- neltlOraliS- 



II. — Thorax shining, punctures coarse and numerous 12. 



Thorax opaque, ponctures line and very sparse 13- 



