THE METALLIC WOOD-BORING BEETLES. 779 



bb. Mesosternal suture distinct; pores of antenna} in small pits on the 



under side of the joints ; size medium, rarely over 17 mm. 

 c. Prosternal spine obtusely rounded at apex. 

 <l. Menturn entirely horn-like; elytra without yellow markings. 

 e. Scutellum small, rounded; tarsi broad, shorter than the tibia 1 . 



II. DlCERCA. 



cc. Scutellum much broader than long, truncate behind. 



III. PlECILONOTA. 



del. Meiituin membranous in front; elytra usually marked with yel- 

 low. IV. Bn-KKsTis. 

 re. Prosternal spine acute at apex ; form very slender. V. CINYKA. 

 na. Prosternal spine acutely angulated behind the coxa', acute at tip; epi- 



mera of rnetathorax partly covered by abdomen. 

 /. Clypeus not contracted by the insertion of the auteume; size small, 



usually flattened. 

 (j. Meutum leather-like in front; base of thorax sinuate. 



VI. MELANOPHILA. 

 <jy. Meutum entirely horn-like. 



//. Base of thorax truncate; anteume serrate in both sexes. 



VII. ANTHAXIA. 



////. Base of thorax sinuate; antenna? pectinate in male, serrate in 

 female. XENORHIPIS. 



ff. Clypeus contracted by the antenna 1 being inserted at the inner ex- 

 tremity of short oblique grooves; size medium; form rather broad 

 and flat, 



/. Third joint of tarsi truncate; hind tarsi with first joint elongate; 



scutellnm large, acuminate. VIII. CHBYSOBOTHBIS. 



ii. Third joint of tarsi much prolonged at side; hind tarsi with first 



and second joints equal ; scutellum small. IX. ACTENODES. 



I. CHALCOPHORA Sol. 1883. (Gr., "copper + bearing.") 



Here belong the largest of our Buprestids, having the antenna* 

 inserted in small fovetv; inentum broadly emarginate in front; hind 

 tarsi with first joint elongated. The males have a distinct sixth 

 ventral segment. 



KEY TO INDIANA SPECIES OF CHALCOPI1OBA. 



(i. Margins of elytra entire or very finely serrate; median dorsal impres- 

 sion of thorax broad, more or less irregular. 



b. Sutural stria of elytra on apical half only; color dull black, feebly 

 bronzed. 1480. VIRGINIENSIS. 



bb. Sutural stria of elytra entire; coppery or brassy yellow. 



1481. LIBEKTA. 



mi. Margins of elytra strongly serrate on apical third; median impression 

 of thorax deep, narrow. 1482. CAMPESTBIS. 



