THE CANADIAN ENTOMOLOGIST. 91 



margin with an irregular series of punctures, interrupted at all the angles, 

 and in the middle anteriorly and posteriorly : elytra sculptured, as in the 

 two preceding species, except that there are several very obsolete rows of 

 flat granules, scarcely discernible, between the suture and the first row of 

 punctures ; and there is no yellow oblique band or gleam near the apex : 

 legs black, with the arms and intermediate thighs dusky or dusky lurid ; 

 the lobes of the metasternum very acute, mere than usually diverging ; 

 incurved a little at the apex. 



Female. Head more visibly, though still very minutely, punctured ; 

 prothorax minutely punctured ; elytra more coarsely punctured at the 

 apex ; legs dusky lurid, posterior tibiae darker, tarsi black ; scapulars, and 

 parapleural grossly punctured ; angle of the mesostethium Avrinkled ; 

 posterior coxae lightly, but not thickly, punctured ; lobes of the metaster- 

 num very acute, not incurved on the apex. [Considered by LeConte 

 to be a variety of D. Confluctis Say.] 



FAMILY GYRINIBJE. 



[78.] 113. Cyclinus assimilis Kirby — Length of body 5^ lines. 

 Two specimens taken in lat 54 [79.] Body depressed, obovate ; under- 

 neath glossy, black, slightly bronzed ; upperlip minutely punctured ; front 

 wrinkled between the eyes ; nose impressed on each side : prothorax 

 anteriorly on each side with a transverse series of punctures parallel with 

 the margin, and with a slight discoidal transverse impression ; at the base 

 obtusangular an* somewhat wavy : elytra with nine very slightly im- 

 pressed furrows, the interstices of which are minutely punctured ; at the 

 apex the elytra are wavy ; epipleura black-bronzed : legs and anus tes- 

 taceous. This species approaches very near to Gyrinus Amcncatms 

 belonging to the same genus, of which I at first regarded it as merely a 

 variety, but upon comparing it with with the specimen preserved in the 

 Linnean cabinet, it appears clearly distinct. This species is smaller, 

 bronzed above, and the interstices of the furrows are without punctures. 

 [Regarded by LeConte as synonymous with Dineutes (Gyrinus) Ameri- 

 canus Linn. This species is common in Canada. LeConte (Pro. Acad. 

 Nat. Sci., Philada., Dec. 1868, p. 367), says that it is "our most abundant 

 species, usually known as apple bug; extends from Lake Superior to 

 Texas, and from Maine to Kansas."] 



114. Gyrinus impressicollis Kirby. — Length of body 4 lines. 

 Taken in Canada by Dr. Biersby. 



