THE LONG-HORNED WOOD-BORING BEETLES. 



1069 



quaking aspen and cotton-wood (Populus), both of which are fairly 

 common in that area. One of the largest and most striking mem- 

 bers of the family in our fauna. 



Tribe IV. AOANTJ IODERINI. 



Small or medium-sized, rather broad and usually somewhat flat- 

 tened species, having the front large, quadrate, vertical; palpi slen- 

 der ; elytra rounded or truncate at tip ; front coxal cavities rounded, 

 closed behind; legs moderate, femora usually strongly club-shaped, 

 middle tibiae with a tubercle on the outer margin ; tarsal claws di- 

 varicate. The color is dull, usually black marked with gray, and 

 the beetles are found on the trunks or limbs of trees. Of the 13 

 genera composing the tribe, eight are known to be represented in 

 the State, while another probably occurs. 



KEY TO INDIANA GENERA OF ACANTHODERINI. 



a. Basal joint of antennae club-shaped; thorax with dorsal tubercles and 

 large acute spine near the middle of each side. 



LVI. ACANTHODERES. 



aa. Basal joint of antennae cylindrical ; spine on side of thorax, if present, 

 behind the middle. 

 b. Females without elongated ovipositor. 



c. Thorax feebly tuberculate or angulate at the sides a little behind 

 the middle; mesosternum broad. LVII. Leptostylus. 



ec. Thorax distinctly angulate, or more frequently with an acute tu- 

 bercle or short spine behind the middle ; mesosternum triangular 

 or narrow. 



d. Antennae without traces of fringed hairs beneath ; first joint of 

 hind tarsi as long as the next two. 



e. Form somewhat flattened ; prosternum narrow but not linear ; 



body without erect hairs. LVIII. Liopus. 



ee. Form cylindrical ; prosternum linear ; elytra with erect hairs. 



LIX. Dectes. 



dd. Antennae distinctly fringed beneath with hairs; first joint of hind 

 tarsi as long as the next three. 



f. Elytra without a carina on each side, usually with transverse 



angulated markings. LX. Lepturges. 



ff. Elytra each with a distinct carina on the side/ their surface 

 marked with numerous small black spots. 



LXI. Hyperplatys. 



bb. Females with elongated ovipositor. 



g. Body above with erect hairs mixed with the pubescence. 



h. Antennae not much longer than the body and without fringed 

 hairs beneath except feebly on the first joint; mesosternum 

 broad. LXII. Graphisurus. 



