KEY TO THE LONG=HORNS. 



8. Dull brownish-yellow; sides of pronotum and of 

 base of elytra black; elytra very indistinctly punctured, 

 especially at the apex, and having an angulate, white 

 band behind the middle. Breeds in hickory 



Leptostylus biustus. 



Brownish, with very fine, dark gray pubescence; 

 elytra distinctly punctured over the entire surface, the tips 

 slightly prolonged, an acutely angulate, oblique, white 

 band behind the middle. Breeds in oak and box elder. 



Leptostylus parvus. 



9. Brownish; pronotum with whitish pubescence forming 

 a broad stripe on each side, banded within by a narrow, 

 blackish stripe formed by a row of elongate, bare tubercles; 

 each elytron with a broad, irregular, white blotch behind 

 the middle and with six lines of minute, black spots. Breeds 

 in butternut, walnut, hickory, beech, and other twigs. 



Leptostylus macula. 



Dull clay-yellow; elytra sprinkled with minute, 

 black spots and irregular patches of dark and gray. 

 Breeds in chestnut Leptostylus collaris. 



10. Antennae without fringed hairs beneath; first joint 

 of hind tarsi as long as the next two 1 1. 



Antennae distinctly fringed beneath with hairs; 

 first joint of hind tarsi as long as the next three 13. 



11. Form cylindrical; elytra with erect hairs, which 

 may be seen when viewed from the side; prostrate ash- 

 gray hairs cover the black color; an acute spine on each 

 side of pronotum near the base; .3 to .4 in. long. Breeds 

 in ragweed (Ambrosia], the larvae hibernating in the 

 stems Dectes spinosus. 



Form somewhat flattened; elytra without erect 

 hairs 12. 



12. Purplish-brown, mottled with black; elytra with 

 numerous, small, irregular, black spots and a dark blotch, 

 bordered behind by gray, back of the middle; .3 to .5 in. 

 long. Breeds under the bark of honey-locust and box- 

 elder Liopus variegatus. 



Usually dull reddish-brown with sparse, grayish 

 pubescence; elytra usually with four rows of small, black 

 dots and with an acute-angular, black band behind the 

 middle; pronotum with three, small, blackish spots. 



357 



