Horn.] 



110 



[Feb. 21. 



Anterior tibiae £> with a single spur moerens. 



Anterior tibiae § with two spurs. 

 Outer spur of hind tibiae, stout, cylindrical, broader 



at tip and concave 1 



Outer spur more slender, very obliquely truncate and 



laminiform at tip 2 



1. Elytra black. 



Thorax, head and legs black. 



Thorax coarsely punctured, sub-pentagonal ; Ely- 

 tra coarsely reticulate reticulata. 



Thorax nearly smooth, sides rounded ; elytra 



finely reticulate cribrata. 



Thorax, head and femora red ; thorax scarcely 



punctured deserticola. 



Elytra luteous or fulvous. 



Head, thorax and elytra similar in color dichroa. 



Head and thorax black, the latter punctured cardinalis. 



2. Slender species, thorax always longer than wide and 



narrower than the head. 



Color above^ rufo-testaceous nitidicollis. 



Color entirely black lugens. 



Color brilliant aeneous, elytra with cupreous tinge. Eathvoni. 



Stouter species, thorax as wide or wider than long, 



and as wide as the head. 

 Body above unicolored. 



Color black, varying to brilliant aeneous stygica. 



Body above bicolored. 



Thorax and elytra similar in color ; hind angles of 



head red auriculata. 



Thorax and elytra dissimilar in color. 



Head and elytra brilliant aeneous, thorax yel- 

 lowish red with median round metallic green 



spot refulgem. 



Head and thorax red ; elytra with faint greenish 

 bronze surface (Eneipennis. 



0, moerens, Lee. Ann. Lye. V, p. 216 ; Proc. Acad. 1853, p. 332. 



Black, feebly shining, surface with faint bluish tinge. Head coarsely 

 and sparsely punctured. Thorax as broad as long, sides in front arcuate, 

 behind slightly convergent, disc feebly convex sparsely punctulate. Ely- 

 tra parallel, finely scabz'ous. Body beneath and legs similar in color to 

 the upper surface. Length .60-. 90 inch ; 15-23 mm. 



Male. Fifth segment broadly emarginate, sixth deeply and acutely 

 notched. Last dorsal segment truncate. Anterior tibiae with a single 

 terminal spur. 



Female. Fifth segment truncate, sixth emarginate, emargination semi- 

 circular at bottom. Anterior tibiae bicalcarate. 



