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VOL. XXVII. LONDON, FEBRUARY, 1S95. No. 2. 



THE COLEOPTERA OF CANADA. 



BY H. F. WICKHAM, IOWA CITY, IOWA. 



VII. The CucujiDyE of Ontario and Querec. 



The Cucujid^e constitute a small family of beetles of depressed, 

 often elongate form, the antenna^ lengthened in many species, giving 

 them a somewhat characteristic appearance, which, while recalling 

 the Cerambycida?, renders them, nevertheless, easily recognized. They 

 may be technically distinguished from the allied Clavicorn families 

 by the long elytra, the five-jointed tarsi (the hind ones sometimes 

 only four-jointed in the males), the rounded or oval anterior coxse, 

 the middle ones with externally open cavities and the posterior 

 separate. The ventral segments are sub-equal in length. The larvge, 

 so far as known, are flattened grubs, with distinct antenna3 and 

 several ocelli; the terminal segments often with hooks or tubercles. 

 The table of genera, as given below, is entirely different from 

 that used in the books, and is based on characters that can be 

 easily seen by any one with the aid of a hand lens, but of course 

 fails to express the real affinities, being made solely for the purpose 

 of facilitating the work of identification of unknown species. Of 

 the four figures given, three are taken from Captain Casey's "Revision 

 of the N. Am. Cucujidi^," while that of Ciicujiis clavipes is original. 

 The above-mentioned paper has proved very useful in the specific 

 separation, and should be consulted by those who have to deal with 

 extra-limital forms. 



Seventeen species are recorded in the Canadian lists \ they belong 

 to eight genera, which separate thus : — 

 A. Antenna with distinct club ; third joint never longer, usually 

 shorter than the second. 



Club of three rather suddenly enlarged joints . . Silvanus. 

 Club of gradual formation Naiisibius. 



