20 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 79 



with a faint metallic luster. Prothorax twice as broad as long, 

 with arcuate sides, alutaceous with scattered coarse punctures; spots 

 moderately large, black. Scutellum entirely black. Elytra parallel, 

 rather coarsely and confluently punctured, pubescent, and, except 

 for pale margin, entirely shining blue green, or with a median pale 

 vitta reaching apex. Body beneath with metasternum and abdomen 

 usually dark except in middle and on the last ventral segment. 

 Length, 5 mm. to 6 mm. ; width, 2 mm. to 2.2 mm. 



Type. — Collected at Winona, Wis., no collector given. Formerly 

 in Brooklyn Museum collection. U. S. N. M. No. 43020 (with 3 

 paratypes). 



Distribution. — Wisconsin (Winona) ; Ontario (Nepigon, Mich- 

 ipicoten) ; Manitoba (Aweme) ; Alberta (Medicine Hat). 



Food plant. — Goldenrod, Solidago (F. S. Carr). 



Remarks. — Although readily separable by its bright blue-green 

 elytra from typical convergens., which is usually of a dull yellow- 

 green, there are few structural characters by which to distinguish 

 this from convergens. In collections it has frequently been labeled 

 fiavolimhata., and has apparently never been associated with conver- 

 gens. It is quite unlike the California -fiavolinibata.^ not only in 

 its small size and parallel shape, but also in the black coloring of the 

 occipital and pronotal spots and ventral surface. The ventral surface 

 in the paler, vittate specimens is pale with only a narrow darker mar- 

 gin, which is not typical of vittate convergens. It is also not quite 

 so densely pubescent. 



9. TRIRHABDA PILOSA, new species 



Plate 1, Figure 9 



Description. — Small, subparallel, covered with moderately dense, 

 white pubescence; head with wide, dark plaga, prothorax with large 

 black spots, elytra entirely green except for pale margin and short 

 median basal vitta not reaching middle, ventral surface mostly dark. 

 Head densely covered with long, white pubescence over the wide 

 black occipital plaga, this plaga often with metallic luster, and ex- 

 tending down front and about upper part of eyes. Antennae with 

 third and fifth joints subequal. Prothorax approximately twice as 

 broad as fong, with slightly arcuate sides, very obtusely angulate at 

 middle; surface alutacedus with coarse punctures, pubescent; spots 

 large, black, sometimes in contact. Scutellum usually black, some- 

 times with pale tip. Elytra finely punctate, densely and finely 

 pubescent; green except for margin and small pale median area be- 

 tween scutellum and humerus, this becoming attenuated and dis- 

 appearing before middle. Body beneath pale with metasternum and 



