THE LONG-HORNED WOOD-BORING BEETLES. 



104:5 



&&. Joints 3 to 5 of antennae normal, usually slender ; ' mandibles acute, 

 fringed on the inner margin ; elytra not colored as above. 

 c. Elytra short, not covering the wings. 



Tribe III. Necydalini, p. 3044. 



cc. Elytra of normal length. 



(I. Front nearly vertical ; body elongate, slender, parallel ; color dark 

 blue. Tribe IV. Encycloptni, p. 1045. 



dd. Front oblique or horizontal ; elytra usually tapering to apex. 



Tribe V. Lepturini, p. 1045. 



Tribe I. DISTENIINI. 



In addition to characters given in key, the single genus of this 

 tribe may be known by having the body elongate; head large, hori- 

 zontal; eyes transverse, large, feebly emarginate; antennae long, 

 tapering,, first joint as long as head, second very small, third and 

 following equal, nearly as long as first ; legs long, slender, hind pair 

 longest ; first joint of hind tarsi as long as the two following united. 



XXXVII. Distent a Serv. 1825. (Gr., "two + band.") 



This genus, sufficiently characterized above, is represented by 

 the single species : 



1930 (6220). Distenia undata Oli.v., Ent, IV, 1795, 25. 



Very elongate, slender, subdepressed. Dark brown to piceous, densely 

 clothed with short, gray, prostrate pubescence; elytra marked with three 

 serrate crossbands of darker pubescence, one on base, one just in front of 

 middle, the other on apical third. Thorax subcylindrical, base and apex 

 truncate, sides with a prominent, acute tubercle; surface with a short me- 

 dian line and four obtuse elevations, smooth, shining. Elytra gradually 

 tapering from base to apex, each with five somewhat irregular rows of 

 coarse punctures ; intervals with distant scattered punctures ; tips each with 

 two sharp, slender spines. Length 17-26 mm. 



Lake, Vigo, Jackson and Crawford counties; scarce. June 25- 

 September 28. Occurs beneath bark of hickory and oak and on 

 foliage of wild grape. "When disturbed feigns death and falls to 

 the ground, where it is difficult to see on account of the protective 

 coloration. 



Tribe II. DESMOCERINI. 



This tribe is represented in the United States by four species 

 belonging to the genus Desmoccrus. They are large insects having 

 the eyes finely granulated, nearly rounded, suddenly and deeply 

 emarginate; antenna? 11-jointed, with joints 3 to 5 thickened at the 



