THE LONG-HORNED WOOD-BORING BEETLES. 



1013 



Montgomery County; rare. August 26. Taken from hemlock 

 at Bloomingdale Glens. 



Subfamily II. CERAMBYCINAE. 



The only characters available for separating this subfamily are 

 those given in the key, viz., thorax not margined; labrum separate 

 from the front; front tibiae not obliquely sulcate; palpi never 

 acute at tip ; antenna always pubescent. The subfamily is of great 

 extent, embracing many genera which are very difficult to separate 

 in easily understood terms. The first distinguishing character 

 used, viz., the " enveloping of the base of the antennas by the eyes," 

 is apt to cause trouble if not properly understood. To make it 

 plain, the antenna) should be extended forward from the head. In 

 this position it will be seen that in those genera where the "base of 

 the antennas is partially enveloped by the eyes," a line passing 

 from the front or inner border of the upper lobe of the eye to a 

 corresponding spot on the lower lobe will pass through the antenna! 

 socket, whereas in the genera where "not enveloped," this line 

 would run behind the socket. All genera in which the eyes are 

 entire are of course "not enveloped," while those in which the eyes 

 are emarginate may be partially enveloped or not. The subfamily 

 is first separated into four Divisions, all of which are represented 

 in Indiana, and these in turn into tribes and genera. 



KEY TO DIVISIONS OF CERAMBYCINiE. 



a. Base of antennae not enveloped by the eyes. 



1). Front coxae transverse, not prominent; antennae with second joint 

 rather large, one-third or more the length of third; head inserted 

 in the thorax. Division I. Callidioides. p. 101.3. 



1)1). Front coxae conical (globose in Distenia), prominent; second joint 

 of antennae small; head usually attached to thorax by a neek ; ely- 

 tra usually tapering behind the middle. 



Division IV. Lepturoides, p. 1042. 

 an. Base of antenna; partly enveloped by the eyes; head inserted in the 

 thorax. 



c. Second joint of antennae small, not over one-fourth the length of third 

 (except in Microelytus) ; front coxae not conical, though sometimes 

 prominent. Division II. Cerambycoides, p. 1020. 



cc. Second joint of antennae about one-third the length of third joint ; 

 front coxae globose, widely separated. 



Division III. Atimioioes. p. 1041. 



Division I. CALLIDIOIDES. 



This division is separated into two tribes, both of which are 

 represented in Indiana. 



