THE CYLINDRICAL BARK BEETLES. 555 



1061 (3276). CoLYDirii uneola Say, Journ. Phil. Acad. Nat. Sei., V, 1826, 

 264; ibid. II, 324. 

 Elongate, cylindrical, slender. Piceous black, moderately 

 sbiuing, legs and antenn;e 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-Oetober 

 23. Occurs especially beneath bark of linden and locust 



^OgS. "(Origiml.y 



Tribe III. PYCXOMERIXL 



Elongate, somewhat flattened species, covered with coarse punc- 

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

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

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

 Two genera are known. 



KEr TO GENERA OF PYCNOMEEIXI. 



a. Antennae 11-jointed, the club 2-jointed. ^'11. Pe.xtheijspa. 



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



VIII. Pvt XOMERtS. 



VII. Pexthelispa Pase. I80L (Gr., "sorrow-!- smooth.") 

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



key to species of penthelisp.\. 



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



prominent. h^matodes. 



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



prominent. 1062. ebfiexa. 



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

 occur rarely from Pennsylvania to Texas. 



1062 (.32S.O). Pexthelispa befiexa Say. Journ. Phil. Acad. Xat. Sci.. V, 

 1S26. 262 ; ibid. II, .322. 

 Elongate, subdepressed. Dark reddish-brown, shininj;. Autennte stout, 

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

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

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

 4-5 mm. 



]\r;irion. Perry and Posey counties: scarce. ]\Iny 13--N(jvember 

 28. Occurs on trunks of dead locust. 



