38 [February, 



Gonioctena arctica Maun. Bull. Mosc. 1853. 

 Gonioctena ajfinis\ Manu. Bull. Mosc. 1852, 2, 369. 

 Locality. Russian America. 



According to Mannerheim's description, this species varies much in color; he 

 also states that it is nearly allied to the European C. nivosa. 



D. 



'21. C. suhsulcata. Oblong, oval, apterous, dark blackish green ; thorax 

 with the margin much thickened, not reaching the apex internally, slightly 

 punctured ; elytra connate, very convex, rounded at the sides, sulcate and punc- 

 tured in regular rows ; antennae, legs and under surface very dark bluish green. 



Length. -32. 



Mann. Bull. Mosc. 1853. 



Locality. Russian America. 



22. C. cribraria. Oblong, oval, bronzed black; thorax much thickened 

 at the sides, reaching the apex, with a few large marginal punctures near the 

 impression ; elytra very dark, bronzed black, thickly and irregularly punctured ; 

 antennae, legs and under surface black. 



Length. -37. 



Locality. Southern States. 



23. C. inornata. Oblong oval, bronzed; thorax with margin thickened 

 and a few coarse punctures at the side ; elytra bronzed black ; legs and under 

 surface dark blue. 



Length. -25. 



Locality. Western States. 



This insect is closely allied to 0. cribraria, but differs iu the color of the thorax 

 and elytra ; there are also more punctures on the thorax, and the lateral impres- 

 sion is less deejj than in C. cribraria. 



24. C. subopaca. Oblong oval, black, bronze, tinged with green ; thorax 

 with thickened margin, with a few punctures at the sides ; elytra finely punc- 

 f^ured, with the punctures forming indistinct rows; antennae dark blue, with the 

 four last joints hairy, legs and under surface black, bronzed. 



Length. -25. 



Locality. Middle States. 



Thorax less punctured ; elytra more finely punctured and less lustrous than 

 iu C. inornata ; the punctures are arranged in rows. 



25. C. auripennis. Oval, oblong, violaceous; thorax with the margin 

 thickened and slightly distant punctures ; scutellum violaceous ; elytra golden 

 cupreous brilliant, exterior edge green, punctured, punctures placed in somewhat 

 regular rows ; antennae, legs and under surface violaceous. 



Length. -32 -46. 

 Say,' J. Acad. 3, 452. 



Locality. Western States, Nebraska, New Mexico and Texas. 

 These insects vary greatly in color ; two specimens from New Mexico are en- 

 tirely violaceous, and in one from Texas the elytra are brilliant green. 



26. 0. vidua. Oblong, oval, black, slightly bronzed ; thorax with the margin 

 thickened, with coarse punctures ; elytra black, slightly bronze, with the punc- 

 tures in somewhat regular rows ; antennae, legs and under surface black. 



Length. -26. 



Locality. Oregon, Col. McCall. 



1*J. C. flavomarginata. Oblong, black; thorax with lateral margin 

 thickened and punctured at the sides ; elytra black, with regularly-disposed 

 punctures, and smaller irregularly disposed punctures ; exterior and tip yellowish, 

 Eegs and under surface black. 



Length. -22 -29. 



Say, J. Acad. 3, 452. 



Locality. Kansas. 



