KEY TO THE LONG-HORNS. 



Front coxae conical (globose in Distenia), prominent; 

 second joint of antennae small; head usually attached to 

 thorax by a rather distinct neck, this appearance being 

 caused by the head being narrowed behind the eyes and the 

 thorax narrowed in front; elytra usually tapering behind 

 the middle. (Division Lepturoides) 4. 



3. Second joint of antennae more than one-third as 

 long as the third; antennae, densely punctured and pubes- 

 cent; scutellum rounded behind; fifth ventral, abdominal 

 segment of the males transverse and the sixth visible, 

 fifth segment of females prolonged ^.nd the sixth invisible. 



Tribe Asemini (p. 341). 



Second joint of antennae not more than one-third as 

 long as the third; eyes finely granulate (i. e., the lines be- 

 tween the facets are feebly impressed) and deeply emargi- 

 nate; pronotum and elytra not spined; antennae of males 

 thicker at the base than those of females and usually longer 

 than the body Tribe Callidiini (p. 342). 



4. Front coxae globose; mandibles chisel-shaped, not 

 fringed on the inner margin; pronotum spined on the sides, 

 and elytra spined at tips; body elongate; head large; 

 eyes large, feeble emarginate; antennae long, tapering, 

 first joint as long as the head. Tribe Disteniini, of which 

 only Distenia undata need be mentioned. It varies from 

 .7 to I in. long; dark brown, densely clothed with short, 

 gray pubescence; elytra marked with three serrate cross- 

 bands of darker pubescence. It occurs beneath the 

 bark of hickory, oak, and chestnut trees. 



Front coxae conical 5 



5. Joints 3 to 5 of antennae much thickened at tips; 

 mandibles simple, not fringed; eyes nearly rounded, 

 suddenly and deeply emarginate. Tribe Desmocerini. 

 Plate LXXXI shows Desmocerus palliatus. Its larvae bore 

 in the stems of elder (Sambucus}. 



Joints 3 to 5 of antennae normal, usually slender; 

 mandibles acute, fringed on the inner margin; elytra not 

 colored as above 6. 



6. Elytra short, not covering the wings. Tribe Necy- 

 dalini, of which only Necydalis mellitus is likely to be found 

 by users of this book. The abdomen, front and middle 



339 



