240 SUBFAMILY X. CURCULIONINJE. 



cave, the hind one much more deeply concave. On each side, at 

 the junction of the transverse ridge and margin, is a stout flat- 

 tened horn and on the middle of front margin of the segment is 

 a third shorter horn. 



347 (8688). PBOCTORUS DECIPIEXS Lee., 1876, 213. 



Elongate-oblong. Dark reddish-brown to piceous, clothed with white 

 and yellowish scale-like hairs, the latter forming a narrow sutural stripe; 

 elytra reddish-brown, with a broad transverse blackish band just behind 

 the middle; antennae and legs pale reddish-brown. Thorax not wider than 

 long, sides broadly rounded from base to beyond middle, then strongly 

 converging to apex, disc coarsely and very deeply punctured. Elytra as in 

 armatus; striae coarsely punctured, intervals flat. Length 3 3.4 mm. 



Ranges from Quebec and New England to Illinois, Northern 

 Michigan, Minnesota and Colorado. In form and color resem- 

 bles Hi/pcrodcs sohitus Boh. but widely different in structural 

 characters. Occurs on willow. 



II. TIIYSANOCNEMIS Lee., 1S7G. (dr., "fringe" + "leg.") 



Beak cylindrical, curved, as long as thorax and punctured 

 near base, male; usually longer, much more slender, almost 

 smooth, shining, female; antenna 1 inserted at apical third or 

 fourth, male, at or behind the middle, female; scape slender, 

 reaching the eyes, which are large, rounded, prominent and 

 coarsely granulated; funicle T-jointed, first joint long and stout, 

 second slightly longer than third, 3 7 nearly equal; ventral seg- 

 ments unequal, first and second equal, third and fourth together 

 usually but slightly longer than second, fifth longer than third 

 and fourth united; pygidium perpendicular, partly exposed; fe- 

 mora unarmed; claws with a long tooth which curves inwards. 



KEY TO EASTERN SPECIES OF THYSANOCNEMIS. 



a. Elytral intervals subequal in width and prominence, 

 b. Elytra with a broad darker band at middle. 



c. Pubescence long, very coarse; intervals of elytra each with a 



single row of much longer lanceolate, subprostrate yellowish 

 or blackish scales; beak of female stout, as long as thorax; 

 front tibiae of male densely fringed with long hairs. 



348. FRAXINI. 



cc. Pubescence much shorter and finer; intervals each with a row 



of broad, distant, suberect white scales; beak of female much 



more slender, as long as head and thorax; front tibiae of male 



without a fringe of hairs. 349. BISCHOFFI. 



bl). Color uniform pale brownish-yellow throughout. 



d. Beak of female much longer than head and thorax, strongly curved 



antennae inserted behind its middle. 350. BALAXINOIDES. 



dd. Beak of female not longer than head and thorax, feebly curved, 



antennae inserted at its iniddle. 351. OCULARTS. 



