20 PROCEEDINGS OF THE NATIONAL MUSEUM vol.70 



gin, slightly arcuately narrowed anteriorly; impunctate; from two 

 to five piceous spots across pronotum, sometimes united to form 

 fascia, or occasionally disappearing entirely. Scutellum rounded, 

 shining, black. Elytra rounded oblong, with narrow margin, and 

 with rounded humeral prominences and basal sulcus within, some- 

 times nearly impunctate, usually lightly but not densely punctate; 

 very lustrous, varying in color from purple to bluish green or green. 

 Body beneath sparsely pubescent, shining yellow or reddish yellow ; 

 tibiae and tarsi usually reddish or piceous ; epipleura usually piceous. 



Length. — 5 to 7.5 mm. ; width 2.5 to 4 mm. 



Type locality. — Missouri. 



Distribution. — Massachusetts, Rhode Island, New York, Pennsyl- 

 vania, Ohio, Tennessee, Indiana, Illinois, Michigan, Iowa, Kansas, 

 Missouri, Oklahoma, Maryland, District of Columbia, Florida, and 

 Texas. 



The bluish green or green form is more common in the north, 

 while the purplish one is more southern. The spots on pronotum are 

 often reduced in southern specimens. In one specimen from Kansas 

 the pronotum is banded with a broad, piceous fascia, leaving only 

 narrow pale margins. 



L. G. Gentner found the beetle feeding on a mint, Teucrium cana- 

 dense^ in Michigan. E. M. Craighead also records finding both 

 larvae and adult beetles feeding on an " undetermined mint " in 

 Pennsylvania. 



12. OEDIONYCHIS FLAVOCYANEA Crotch 



Fig. 10 



Oedionychis flavocymiea Crotch, Proc. Acad. Philadelphia, vol. 25, 1873, p. 

 62.— Horn, Trans. Amer. Ent. Soc, vol. 16, 1889, p. 181. 



Rounded oblong-oval, moderately convex, very shining, pronotum 

 yellow brown with piceous markings, elytra greenish blue or purple 

 having a narrow yellow margin. Antennae not half the length of 

 body, moderately stout, third and fourth joints about equal, basal 

 joints and terminal joint lighter colored. Head reddish brown, 

 deeply and coarsely punctate except on middle of occiput; median 

 depression short and distinct, interocular space over half width of 

 head. Pronotum nearly three times as wide as long, convex, with 

 moderately broad explanate margin arcuately narrowed anteriorly, 

 faintly and sparsely punctate; a median piceous spot, sometimes a 

 smaller spot on either side. Scutellum rounded, black and shining. 

 Elytra rounded oval, with rounded humeral prominences and basal 

 depression within, coarsely and shallowly punctate, smoother toward 

 apex; shining, bluish green or purple, with moderately wide yellow 

 margin. Body beneath shining reddish brown, sparsely pubescent; 

 epipleura piceous. 



