AMERICAN COLEOPTERA. 



135 



This species has been taken by Dr. Williston in southern Wyom- 

 ing among the Buffalo grass. I have a specimen taken in May at 

 Helena, Montana. 



C. splendida Hentz. 1830, Trans. Am. Phil. 8oc. iii, 254, pi. 2, fig. 3; Schaupp, 

 Lc, p. 90, pi. 2, fig. 45, 46. 

 Length 12-15 inm.=.48.-.60 incb. 



Habitat. -Iii. Y.l N. C. ; Neb.; Kan.; Mo.; Tex.; Colo. 



Head and thorax green or blue, elytra cupreous with green 

 margins; beneath green. Elytral markings very variable, from 

 none at all to complete markings of the limbalis type. The usual 

 markings of splendida are a short middle baud and an apical dot. 



I^Ir. Knaus states that splendida occurs with jmrptirea in Kansas 

 and is the more abundant. 



Var. amcBua Lee, 1848, Ann. Lye. iv, 177, pi. 13, fig. 3; Schaupp, I.e., p. 90. 



Habitat— Northern Missouri and Kansas. 



The type of am<ena in the Leconte collection is a limbalis with 

 greenish coppery thorax and, as I have received from Mr. Knaus 

 specimens of splendida with the full livibalis markings, I have no 

 doubt that amKna is an extreme form of splendida, bearing the 

 same relation to that species that limbalis does to purpurea. As it 

 occurs with typical splendida there is no geographical reason for sep- 

 arating it, and I retain the name only for convenience of cabinet 

 arrangement to represent the forms of splendida in which the middle 

 band and six to eight dots are present. 



Formosa group. 

 Thorax convex, not margined, subquadrate ; palpi of % usually pale at base ; elytra 

 convex, markings broad and usually connected at margin ; front, thorax 

 and abdomen very hairy ; larger than the average. 

 Elytra feebly granulate-punctate. 



Coppery red, middle band obtusely bent formosa. 



Greenish-coppery or brown bronze, middle band more deflexed.geiierosa. 

 Greenish or coppery bronze, humeral lunuleand middle band obliquely bent, 



more slender in form venusta. 



Elytra more strongly punctured, not granulate. Form less convex. 



Markings very broad, sometimes confluent latesignata. 



Markings of nearly normal width, connected at margin but not confluent. 



teniiicincta. 



This group differs from all preceding groups by the hairiness of 

 the sides of the abdomen. 



TKANS. AM. ENT. SOC, XXVIII. APRIL, 1902. 



