THE METALLIC WOOD-BORING BEETLES. 



791 



broadly but not deeply triangularly notched at middle. Thorax twice as 

 wide as long, narrowed at apex and base, sides regularly curved ; disk with 

 a vague median densely punctured sulcus, wider in front, limited on each 

 side by an elevated smooth space, between which and margin the surface 

 is irregularly and densely punctate. Elytra wider than thorax, gradually 

 narrowed from middle to apex; margins feebly serrate, tips obtuse; first 

 costa distinct on apical half, the others replaced by broad smooth spaces 

 of irregular shape, the surface between them densely punctate. Body be- 

 neath very shining, the last ventral with submarginal serrate ridge. Length 

 10-16 mm. 



Lake and Knox counties; scarce. June 6-July 28. Occurs on 

 scrub pine in the former county. Ranges from Massachusetts to 

 Lake Superior. 



C. trinervia Kirby, piceous, bronzed, elytra and abdomen more 

 or less cupreous, length 9-14 mm., is said to occur from the Middle 

 States westward; C. pusilla Lap., dark coppery-bronze, length 5.5- 

 7 mm., occurs from Massachusetts to Wisconsin and has been taken 

 near Cincinnati. 



1503 (4657). Chrysobotheis sex-signata Say, Trans. Amer. Phil. Soc, 



VI, 1836, 158; ibid. II, 103, 591. 

 Elongate-oblong, -subdepressed. Piceous with faint 

 bronzed lustre ; elytra each with three rounded brassy 

 spots, one basal, one in front of middle on second 

 costa, the other one-third from apex ; beneath bright 

 green, the sides cupreous ; antennae green in both sexes, 

 the third joint as long as the next three. Clypeus tri- 

 angularly emarginate at middle, curved on each side. 

 Thorax twice as wide as long, abruptly narrowed in 

 front, sides slightly curved, hind angles obtuse; disk 

 with a vague median impression on basal half and a 

 subapical oblique one each side, coarsely and densely 



rig. ouu. ^nnci x enjoin u ru 



punctured, transversely strigose. Elytra wider than Fifth Rep. u. S. Ent, Comm.) 

 thorax, sides nearly parallel in front, obliquely nar- 

 rowed behind the middle; surface with first costa nearly entire, the others 

 represented by faintly elevated smooth Hues, coarsely and closely punctate. 

 Prosternum not lobed in front. Length 6.5-11 mm. (Fig. 306.) 



Marshall, Putnam, Perry, Vigo and Knox counties; scarce. May 

 21- July 25. A handsome and easily recognized species. 



1504 (4660). Chrysobotheis azueea Lee, Trans. Amer. Phil. Soc, XI, 



1859, 239. 



Oblong, rather broad, subdepressed. Color variable from blue to green- 

 ish-blue, violet or cupreous ; beneath blue, the sides sometimes cupreous ; 

 antennae greenish, male, bronze, female, the third joint nearly as loug as 

 the next three. Clypeus broadly, not deeply, triangularly emarginate at 

 middle. Thorax twice as wide as long, without well marked depressions ; 



