NORTH AMERICAN COLEOPTERA. 109 



The following table will assist in the indentification of the species : 



Eyes very nearly contiguous on the occiput ; thorax subangulate at the sides. 



40. iiiipressa. 

 Eyes normally distant on the occiput. 

 Last ventral segment with submarginal, elevated, serrate ridge ; tliird joint of 

 antennae long. 

 Species very large (21.5 mm.) ; thorax with callosities, abruptly narrowed in 

 front; elytral sculpture recalling Chalcophora. 



41. chalcoplioroitleiii. 

 Species smaller (7-8 mm.); thorax without callosities feebly narrowed in 



front; elytral sculpture feeble 42. aiia.lis. 



Last ventral segment without submarginal serrate ridge. 



Elytra with costfe more or less distinct; disc of thorax uneven, sides at base 

 usually obliquely narrowing. 

 Third joint of the antennae as long as or longer than the next three. 

 Color above dark bronze ; tooth of anterior femur serrulate, the tibia % 



arcuate and serrulate 43. ise.xMiguata. 



Color violaceous or cupreous ; tooth of anterior femur not serrulate, the 



tibia % not serrulate 44. aziirea. 



Third joint of antennae shorter than the next two ; color dark bronze. 



45. seneola. 

 Elytra without trace of costae. 



Thorax twice as wide as long 46. clirysoela. 



Thorax less than twice as wide as long 47. scitula. 



The species above enumerated belong to the Atlantic and central 

 regions ; none have as yet occurred on the Pacific slope. 



40. <'. iiupressa Fab. — Form ratlier broad, depressed, piceous, surface with 

 faint bronze lustre, more evident on the thorax ; antennae piceous, three basal 

 joints feneous, gradually more slender to the tip, the third joint as long as the 

 next three ; front rather flat in both sexes, more pubescent in the male, coarsely 

 and densely punctured, a short sinuous carina above each antennal fovea, another 

 more elevated at middle of front, above which in the female is a chevron ; eyes 

 very closely approximated oti the occiput, especially in the males; clypeus (199) 

 broadly triangularly emarginate at middle, oval each side ; thorax more than 

 twice as wide as long, subangulate at the sides, base slightly wider than apex, 

 sides in front very oblique, then for a short distance less oblique, then arcuately 

 narrowing to base; disc moderately convex, a vague median depression, another 

 oblique, post-apical, three others vaguely impressed between the middle and side ; 

 sui-face coarsely punctured, punctures rather sparse at middle, more den.se but 

 not confluent at the sides ; elytra very little wider than the thorax, nearly par- 

 allel, obliquely narrowed at apical third, the margin strongly serrate almost from 

 the humeri, the apices obtuse ; disc somewhat flattened, the basal fovea small 

 but deep, the humeral depression well marked, first costa elevated from apex 

 two-thirds to base, continued by a smooth line, the second costa faintly elevated, 

 interrupted by the anterior fovea, continuing faintly to the basal fovea, third 

 costa faint and short, the fourth elevated only near the apex, a faintly impressed 

 densely punctured, obcordate fovea one-third from apex between the second and 

 fourth costtE, another one-third from base, bilobed, interrupting the second costa ; 



