THE LONG-HORNED WOOD-BORING BEETLES. 



1078 



Lawrence County; rare. June 5. Beaten from limbs of dead 

 oak. Ranges from Canada and Pennsylvania to Kansas and Texas. 



L. planidorsus Lee, densely clothed with gray hairs, elytra with 

 interrupted dark crossbar, length 9 mm., is known from Michigan, 

 Louisiana and Texas. 



1982 (6411). Leptostylus aculiferus Say, Journ. Amer. Phil. Soc, III, 

 1823, 329; ibid. II, 186. 

 Elongate-oblong, robust. Blackish-brown, densely 

 clothed with short, prostrate, grayish pubescence; elytra 

 with a whitish band behind the middle, this broad at su- 

 ture, narrowing toward the sides, and edged with a black 

 line behind which the surface is fuscous or smoky brown ; 

 joints of basal half of antenna^ spotted, those of apical 

 half, annulate at tips with brown. Disk of thorax with 

 five blunt tubercles. Male with hind trochanters ending in a short, acute 

 spine. "Length 7.5-10 mm. (Fig. 461.) 



Southern half of State, frequent; probably throughout. April 

 22-September 20. Breeds in a variety of trees, especially sycamore, 

 oak, apple and osage orange. The larvae mine under the bark and 

 are usually found in diseased or recently cut trees. 



LVIII. Liopus Serv. 1835. fGr., "smooth + foot") 



Species usually smaller than those of Leptostylus and differing 

 by having an acute spine behind the middle on each side of thorax ; 

 prosternum usually narrow; mesosternum gradually narrowed be- 

 hind, truncate at tip and not dilated ; antennas always longer than 

 body, joints 5 to 11, very nearly equal in length. Five species are 

 known from the State. 



KEY TO INDIANA SPECIES OF LIOPUS. 



a. Front flat, mouth in the same plane as the front; elytra without an 

 angular mark behind the middle; sides of thorax curved, the spine 

 small and acute. 1983. variegatus. 



aa. Front convex, mouth slightly retracted; spine on side of thorax rather 

 distant from base. 

 1). Elytra with distinct tufts of small, black, erect scales. 



c. Form robust; pubescence pale ash-gray; elytra with one broadly 



angulated band. 19S4. crassulus. 



cc. Form slender ; pubescence brown ; elytra with one band forming 

 a broad angle, and a second less distinct band behind it. 



1985. FASCICULARIS. 



1)1). Elytra without tufts of erect scales. 



d. Elytra with an acutely angular blackish band behind the middle. 



19S6. ALPHA. 



dd. Elytra without an angular band but often with a feebly marked 

 transverse band of whitish pubescence. 19S7. punctatus. 



