IsA 



THE CANADIAN ENTOMOLOGIST. 



forms may be separated by their colour, but -it is to be remembered that 

 the elytral pattern is subject to variation. None of them have the pro- 

 thorax strongly rounded on the sides, but the form of this segment is 

 campanulate. Excluding the extralimital forms, those belonging to our 

 fauna may be thus known : 

 A. Body above and beneath, legs and antenna? entirely black, ex- 

 cept occasionally a rufescent spot in humeral region. .36-. 44 



in lugubris, Say. 



AA. Body beneath variable, antennae blackish, legs black or rufous, 

 elytra never entirely black, usually banded. 



b. Legs black. Elytra black with three transverse bands and 

 basal spot yellow, the anterior two bands sometimes 



united at suture. .36-. 40 in sparsus, Lee. 



bb. Legs ferruginous. 



Prothorax very coarsely sparsely punctured. Elytra 

 black, with basal spot and three transverse bands 

 (the anterior two frequently united at suture) yel- 

 low. .40-. 5 2 inch zcbrattis, Fabr. 



Prothorax more finely and densely punctured. Elytra 

 brownish or reddish, with yellow markings much 

 like those of the preceding species, but these 

 may be incomplete or even wanting. .40-. 5 6 



inch velutinus, Oliv. 



T. zebraius (fig. 28) is said to mine in white oak. 

 It bears considerable resemblance to Leptura nitens, 

 from which it, however, easily separates by the generic 

 character. T. sparstcs is unknown to me, and the 

 description is taken from Mr. Leng's table; velutintis 

 is often very abundant on flowers in the summer 

 months. 



Leptura, Serv. 

 This genus is of very large size, and many of the 

 species are quite abundant. There is no uniformity of Fig. 



facies to give a ready clue to its separation from allied groups, some of 

 the species resembling Strangalia in the shape of the prothorax, while 

 others are very difft^rent. 



The succeeding synopsis follows those of Dr. Leconte and Mr. 

 Chas. W. Leng. with but few changes, chiefly such as are made neces- 

 sary by later corrections of synonymy. 



