THE CLICK BEETLES. 745 



KEY TO SPECIES OF GROUP A. 



a. Size larger, 14.5 or more mm. 



It. Sides of thorax straight or nearly so; those of elytra distinctly con- 

 verging on apical half. 



c. Thorax distinctly narrower at apex than base, the sides straight 

 from base to apex; last ventral of male very coarsely punctate; 

 length 15-16 mm. 1400. CORTICINVS. 



cc. Thorax very slightly narrower at apex than base, the sides dis- 

 tinctly rounded near apex ; length 17.5-18 mm. 



1407. GLANDICOLOK. 



1)1>. Sides of thorax feebly but distinctly rounded, slightly sinuate in 

 front of hind angles; those of elytra parallel or nearly so; color 

 darker; length 1S-21 mm. 1408. CASTANU-KS. 



mi. Size smaller, not over 12.5 mm. 



d. Disk of thorax evenly and rather coarsely punctate ; carina? of hind 

 angles acute, distinct, close to and parallel to outer edge and reach- 

 ing beyond the middle of thorax. 1400. IONOIJILIS. 

 till. Disk of thorax unevenly and sparsely punctate; carime of hind an- 

 gles more or less oblique, not reaching middle. 



r. Thorax more densely and coarsely punctured on sides than on mid- 

 dle, its sides straight or nearly so from base to apex; antenna 1 

 of male very long. 1410. I.ONGICOKMS. 



ee. Thorax rather finely and sparsely punctured on both sides and 



middle, its sides distinctly rounded on apical half. 

 /". Ventral segments of abdomen, except the last, finely and rather 

 sparsely punctate ; reddish or chestnut brown ; length 7-0 mm. 



1411. AMKKICANUS. 



If. Ventral segments with coarse, dense, elongate, more or less con- 

 fluent punctures; piceous or dark fuscous-brown; length 10- 

 11 mm. 1412. CKIP.RIVENTRIS. 



1406 (4304). MELANOTUS CORTICINUS Say, Journ. Phil. Acad. Nat. Sci., Ill, 



1823, 174; ibid. II, 113, 621. 



Elongate, sub-convex. Chestnut or dark reddish-brown, sparsely clothed 

 with long grayish hairs. Second and third joints of antenna? small, rounded, 

 subequal; together much shorter than fourth. Thorax one-fourth longer 

 than wide; disk with a median impressed line on basal half; surface rather 

 sparsely and coarsely punctate, mure densely on sides; hind angles feebly 

 diverging, strongly carinate. Elytral stria 1 feebly impressed with rattier 

 large, close-set punctures; intervals sparsely and finely punctulate. Length 

 14.5-15.5 mm. 



Knox, Orange, Crawford ;uul Poscy (-(unities; scarce. May 15- 

 .Jut:e S. The seven specimens at hand are all males. 



1407 (4:521). MKT.ANOTI-S GLANIMCOI.OU Melsh., Proc. Phil. Acad. Nat. Sci.. 



II, 1844. 152. 



Elongate, the sides straight and parallel from near (lie front angles of 

 thorax to beyond the middle of elytra. Chestnut-brown; sparsely pubes- 

 cent with grayish-yellow hairs. Second and third joints of antenna' sub- 



