1878.] 615 {LeConte. 
margin, the other at the middle and near the blackish lateral margin, 
though separate from it. Antenne slender, more than one-half as long as 
the body, black, first three joints brown. Beneath black, tibiee and tarsi 
piceo-testaceous. Length 2 mm.; .08 inch. 
Detroit ; one specimen. Quite different from any other 
striped species in our fauna, and representing the European 
P. biguttata Foudras. Alt. 251. 
The adoption of the Kirbyan name Orchestris for this genus by Mr. 
Crotch (Proc. Ac. Nat. Sc. Phila. 1873, 65) in preference to Phyllotreta 
Foudras, seems to me inexpedient for the following reasons : 
Kirby (Faun. Proc. Am. IV, 217), characterizes a sub-genus Orchestris 
by a very brief formula, which is applicable to several groups of the old 
genus Haltica, to which generic names are now affixed. 
His sub-genus was evidently defined for the purpose of describing two 
striped species of large size now enrolled in Disonycha Chevr., but in order 
to make his volume (exclusively devoted to North American species), more 
intelligible to the English ene he casually observes that his sub-genus 
corresponds with section b. gine of Stephens, ‘“‘of which H. Nemvorum is 
the type.’ 
Now while unwilling to dispute that H. nemorwm is the type of Stephens’ 
unnamed British group, it is quite apparent that the remark of Mr. Kirby 
‘indicates simply an error of judgment or observation in not perceiving the 
differences (if there be any), between his large American species, for which 
the sub-genus was established, and the small European species; and thus 
the sub-generic name belongs properly to the former group. 
The ndtme Orchestris, therefore, unless it is dropped entirely in conse- 
quence of its heterogeneous limitation, can be used only to supplant Dis- 
onycha Chevr, (1844),and the present group must be known as Phyllo- 
treta, under which name it was first characterized by Foudras in 1860 
48. Cheetocnema rudis. Oval, convex, bronzed, not shining, 
Head finely punctured. Prothorax rather densely and strongly punctured, 
very little narrowed in front, sides slightly rounded, finely margined, base 
not margined. Elytra with rows of deep punctures, the inner ones slightly 
confused near the base ; space between the scutellar stria and the suture 
irregularly punctured. Beneath punctured, tibie and tarsi brown. Length 
1.8 mm.; .07 inch 
Marquette, Lake Superior; one specimen. This species be- 
longs in the table (ante. p. 419), after eribrata, from which 
it differs by the much less confused elytral striz. 
49. Mycetochares gracilis. Elongate, piceous-black, shining, 
finely and sparsely pubescent. Head punctured, front depressed, vaguely 
foveate. Antenne nearly half as long as the body, piceous, base brown ; 
2d joint small, 3d a little longer than the 4th. Eyes convex, prominent. 
Prothorax wider than the head, wider than long, narrowed and much 
