AMERICAN COLKOPTKRA. 299 



AnteUnse ( % ) stouter, outer joints more oval, usually distinctly less than 

 twice as long as wide. 



Head broader, subtriangular, the sides a little divergent behind ; form 

 stouter, the legs shorter and less slender; thiM antennal joint 

 relatively more elongate; color dull black, rarely greenish black. 

 Length 8-14 mm. iTaft.— California (San Francisco). . .sflolida. 



Head quadrate, sides parallel behind the eyes; form less robust; legs 

 rather longer and more slender; third antennal joint less elon- 

 gate; color varying from black through blue to a more or less 

 brilliant green. Length 9-14 mm. i/a6.— California, Oregon. 



Washington slygica. 



Antennae ( % ) mor« slender, joints 3-11 more than twice as long as wide, 

 the outer joints more cylindrical; color black, elytra with faint 

 purplish or violet lustre. Length 7-14 mm. i7a6.- Southern 



California 



■ purpiiraMceiis. 



Pubescence short, sparse, whitish throughout; antennal joints more parallel 

 and elongate than in sfygica ; color brilliant green. Length 7-12 

 mm. Hab. — California (Kern and Tulare Counties). . .chloris. 



Pubescence black, moderately long and very conspicuous; black, elytra blu- 

 ish black. Length 8-14 mm. ifai.— California (Tulare and Tuo- 

 lumne Counties) nigrinilis. 



6. Occiput red, thorax and elytra dark bluish green ; surface with well-marked 



pale pubescence. Length 8-15 mm. Jfaft.— California (Middle 

 and Southern) ; Lower California aurieulata. 



Head and elytra brilliant viridi-aeneous, thorax reddish yellow, with median 

 metallic green spot. Length 8-10 mm. iTaft.— California (" Mil- 

 lerton ") refulgeus. 



Head behind the eyes, and thorax, red ; elytra dark green. Length 8-12 mm. 

 Hah. — Southern California {eneipennis. 



Head greenish black; thorax red, elytra dark green. Length 8-10 mm. 

 Hab. — California (San Diego) Crot<'hii. 



Body black throughout, without lustre; head coarsely punctate; antenna? 

 more slender, thorax smaller and more narrowed behind than in 

 stygica or stolida. Length 10-12 mm. i/a6.— California (San 

 Diego) diflicilis. 



7. Color above reddish testaceous, "elytra sometimes black." Length 13-18 mm. 



Hab. — Southern California, Lower California.. • -nitidicollis. 

 Color entirely black. Length 10-16 mm. ifafi.— Southern California. 



lugeiis. 

 Head and thorax viridi-aeneous, elytra violaceous or cupreous. Length 7-12 



mm. Hab. — California (Sacramento to Tulare Co.). .rathvoiii. 



III. 



Anterior tibite of % with two spurs. 



Antennffi moderately compressed, intermediate joints ( % ) not or scarcely wider 



than long; scutellum rather deeply sulcate. 



Thorax very convex, as wide as or somewhat wider than long; color green 



or blue. Length 8-13 mm. Hab.— Dakota and Kansas to Eastern 



Washington and California sphfericollis. 



TEANS. AM. ENT. SOC, XXVII. AUG 1901 



