THE CYLINDRICAL BARK BEETLES. 



1061 (3270). Colydium lineola Say, Journ. Phil. Acad. Nat. ScL, V, 182(3, 

 264 ; ibid. II, 324. 



Elongate, cylindrical, slender. Piceons black, moderately ^ 

 shining, legs and antennae paler. Thorax much longer than 

 wide, the disk with a deep impressed line at center and an- 

 other abbreviated one on each side, surface rather coarsely 

 punctured. Elytra not wider than thorax, each alternate in- 

 terval finely ribbed, the interspaces with two rows of punc- 

 tures. Length 4-6.5 mm. (Fig. 208.) 



Throughout the State; frequent. April 9-October 

 23. Occurs especially beneath bark of linden and locust Kg 2 ^ xQh 



(Original.) 



logs. 



Tribe III- PYCNOMERINI. 

 Elongate, somewhat flattened species, covered with coarse punc- 

 tures and having the elytra marked with rows of very large punc- 

 tures; hind coxaa small, oval, widely separated; first joint of tarsi 

 longer than either of the next two, the third longer than fourth. 

 Two genera are known. 



KEY TO GENERA OF PYCNOMERINI. 



a. Antenna. 11-jointed, the club 2-jointed. VII. Penthelispa. 



aa Antenna? 10-jointed, the club composed of a single joint. 



VIII. Pycnomerus. 



VII. Penthelispa Fasc. 1861. (Gr., "sorrow + smooth. ") 

 Two species belong here, both of which may occur in the State. 



key to species of penthelispa. 

 a Thorax slightly wider than long, not narrowed behind; hind angles 



H^MATODES. 



prominent. , 

 aa Thorax longer than wide, slightly narrowed behind; hmd angles not 



ail. -Liiuiu ^ 1(>62 reflex A. 



prominent. 



P. Kcematodes Fab., brownish, shining, length 3.5 mm, is said to 

 occur rarely from Pennsylvania' to Texas. 



1062 (3285). Penthelispa reflexa Say, Journ. Phil. Acad. Nat. ScL. V, 

 1826, 262 ; ibid. II, 322. 

 Elongate subdepressed. Dark reddish-brown, shining. Antennae stout, 

 shorter than' thorax, the latter with disk deeply and coarsely punctured. 

 Elytra slightly wider than thorax, disk flattened, deeply and broadly striate, 

 the striae coarsely and closely punctured; intervals very narrow. Length 

 4-5 mm. 



Marion, Perry and Posey counties; scarce. May 13-November 

 28. Occurs on trunks of dead locust. 



