200 GEO. II. HORN, M. D. 



7. C Iiarpalinus, Esch.— Body abnve and beneath black, head metallifi 

 green, thdnix bronzed. Head minutely piinetulate, labriun truncate, antennjE 

 entirely black, palpi slender. Thorax quadrate, broader than long, sides moder- 

 ately arcuate, surface punctured in a manner similar to wi^er but much less 

 densely and deeply. Basal line of elytra arcuate at humeri, striae moderately 

 deej), indistinctly punctured, intervals feebly convex, modsrately densely and 

 rather finely punctured, sparsely clothed with short black j)ube3cence. Pro- 

 sternum nearly smooth in front, episterna obsoleteh' punctured. Metasternal 

 episterna long, sparsely i)unctured and margined. Abdomen as in nigcr. Length 

 .44 inch ; 11 mm. 



Anterior femora simple in the male. 



Cliaufioir describes the form of the thorax somewhat differently, 

 but the form varies moderately and I have thought it better to use 

 more general terms. 



Occurs on the Pacific coast from Vancouver Island to San Jos<?, 

 California. 



8. C iinpiiiietirronN, Say. — Body black, head brilliant green, thorax 

 greenish, subopaque, elytra black, opaque, legs rufo-testaceous. Head nearly 

 smooth, labrum truncate, antennae rufo-testaceous. Thorax broader than long, 

 base slightly broader than apex, sides moderately arcuate with narrow red 

 edge, hind angles obtuse, surface subopaque, moderately densely but finely 

 punctured, sparsely pubescent, median and basal lines finely imjiressed. Elytra 

 with basal line very feebly subangulate at humeri, striae rather deep, moder- 

 ately punctured, intervals flat, finely and moderately densely punctulate 

 sparsely clothed with short pale pubescence. Prosternum moderately coarsely 

 punctured, episterna more finely. Metasternal episterna elongate, sparsely 

 punctured, margined. Abdomen as in niger. Length .52 — .62 inch; 13 — 

 15.5 mm. 



Anterior femora of male simple. 



This species is peculiar in having a very flat thorax, of a form not 

 very different however, from niger. It must be considered out of line 

 in any attempt at a linear arrangement of our species. 



Occurs from Canada to Texas. 



9. C. iiiaxillosuN. n. sp. — Body beneath piceous, legs pale, above black 

 with slight violet tinge. Head smooth, with slightly bluish tinge, labrum 

 truncate, mandibles elongate, feebly arcuate, deflexed; antennae rufous, three 

 basal joints paler, third joint very little longer than the fourth. Thorax 

 broader than long, base wider than apex, sides regularly arcuate, not sinu- 

 ate, disc moderately convex, coarsely, deeply and very irregularly punctured, 

 intervals smooth. Elytra oblong oval, basal line arcuate at humeri, deeply 

 striate, striae indistinctly punctured except at base, intervals convex, very 

 sparsely and irregularly punctate, sparsely pubescent. Prosternum margined 

 at tip, coarsely punctured, ejjisterna coarsely punctured. Metasternal episterna 

 coarsely punctured. Abdomen as in niger. Length .40 inch; 10 mm. 



This species is peculiar in many respects. The mandibles are more 



elongate and less arcuate thau in any species in our fauna, resembling 



