NORTH AMERICAN COLEOPTERA. / / 



dilatation at apex ; middle and posterior tibiae straight ; last ventral segment (27) 

 semi-circularly emargiuate ; last dorsal coarsely, sparsely punctate, slightly 

 notched at middle. 



Female. — Presternum as in the male ; anterior tibia very slightly arcuate, the 

 others straight ; last ventral (28) sinuately truncate ; last dorsal coarsely punc- 

 tate, the apex entire. 



In the bright blue or green specimens the extreme margin of the 

 thorax as well as the entire lateral margin of the body beneath and 

 the femora are bright cupreous. The brightly cplored specimens 

 with the more distinct blackish vitta are very pretty and easily 

 known, the darker forms by their color and form resemble seitiUa at 

 first glance. 



Occurs in Indiana, Illinois, Kansas and Texas, the latter region 

 being most numerously represented. 



Group II. 



The group here separated is characterized by having the disc of 

 the thorax irregular, more or less sulcate at middle, the last ventral 

 segment with serrulate margin. The clypeus is acutely incised at 

 middle, semi-circular each side and it may be aptly compared to two 

 semi-circles tangent with their diameters continuous. The anterior 

 tibiae of the male are arcuate, the inner edge multi-denticulate and 

 the middle tibiae are similar. The form of the two pairs of tibise is 

 repeated in sexdgnata which has also a similar clypeus, but more 

 broadly emarginate, but the last ventral segment has the lateral 

 margin entire. 



There is but one species known which can be referred to this group, 

 but what the group lacks in number is made up in the variation of 

 that one species and is without parallel in our series. 



7. €-. foinoratst Fab. — Form oblong, sometimes slightly robust or moder- 

 ately elongate, usually of dark bronze surface, but sometimes slightly brassy, 

 cupreous, or rarely seneous ; antennse serrate from the fourth joint and gradually 

 more slender to the tip, the third joint a little longer than the next two; green- 

 ish % or cupreous 9 ; front rather flat % or slightly convex 9 ^^d ^Jth a 

 chevron in both sexes and other callosities 9 ; clypeus (31) at middle acutely 

 notched, on each side semi-circular ; thorax more than twice as wide as long, 

 widest slightly behind the apex, the sides somewhat irregular, slightly narrowed 

 at base ; disc irregular, an indistinct median depression, a deeper depression pos- 

 terior to and parallel with the apical margin, with other irregular depressions 

 near the side ; surface rather coarsely punctured less densely at middle, more 

 densely and deeply at the sides ; elytra a little wider than the thorax, sides 

 nearly parallel, gradually narrowed at apical third, the margin serrate, the apices 

 obtuse ; disc feebly convex, the sculpture very variable, usually with the first 



