XORTII AMERICAN COLKOJ'TERA. 



223 



opening expanded in u bell-shaped manner as in 2)/mne.i. The tho- 

 racie margin is always irregular, not forming a continuous line. 

 The tai-salclaws are broadly ai)pendiculate at base, the tibia? entire 

 and without emargination. 



The differences between Colaspis and tlie genera closely related to 

 it are stated in the analytical table. 



The species are not numerous, and may be readily separated by 

 the following table : 



Elytra with costiform intervals, between which are two or more rows of punc- 

 tures more or less confused ; body nearly smooth beneath. ..bruiliica. 

 Elytra not costate, or only vaguely so at apex. 

 Body beneath comparatively smooth. 

 Purplish black, thorax very coarsely, deeply and somewhat irregularly punc- 

 tate; elytral punctures with a slight tendency to a strial arrangement. 



iiigrocyaiiea. 

 Green, blue or bronze, metallic; punctures of thorax evenly arranged, not 

 very coarse nor deep ; elytral punctures equal, but not in strise.. favosa. 

 Body beneath very distinctly punctate, the metasternum never smooth. 

 Blue, dull green or bronze; elytral punctures simple, finer toward apex. 



oregouensis. 

 Brio-ht green, inclining to golden : elytral punctures simple, finer toward 



"apex chrysis. 



Piceous with very faint bronze surface lustre: elytral punctures simple, 

 rather coarser and substriate at apex intermedia. 



V. brniiiiea Fab. (Galleruca), Ent. Syst. Suppl. p. 94; Oliv., Eut. vi, p. 891. 

 pi. ii, fig. 27; suilla Fab., Syst. El. i, p. 417; Oliv., loc. cit. p. 892. pi. ii, fig. 28 : 

 flavidaSRj, Long's Exped. ii, p. 295; edit. Lee. i, p. 196; flavicans Lef, Catal. 

 Eumolp. 1885, p. 33.— Oval, slightly oblong, moderately convex, usually yellow- 

 ish testaceous, but variable in color, not shining, legs always pale. Head punc- 

 tate, not closely, a little more finely on the occiput. Antennae, pale, the outer 

 joints often piceous. Thorax about one-half wider than long, narrowed in front, 

 sides rather broadly arcuate, the margin irregular, sometimes sub-bidentate. an- 

 gles distinctly prominent, disc moderately convex, moderately closely and evenly 

 punctate. Elytra with intervals more or less costate, between which are two 

 iiregular rows of coarse and deep punctures. Propleuraj moderately coarsely, 

 but not closely punctate, metasternum smooth, abdomen sparsely finely punctate. 

 Length .10— .24 inch. ; 4—6 mm. 



In the male the first joint of the anterior tarsi is distinctly dilated. 

 The last ventral is entire. In the female the tarsus is slender and 

 the last ventral emarginate. 



This species is very variable. 



fiavida Say.— Yellowish testaceous, a little darker beneath. Of 

 i\\\?, flavicans Lef. is merely a larger form. 



TRANS. AM. ENT. SOC. XIX. JULY, 1892. 



