THIHE XV. CLEONIXI. 333 



(L Thorax distinctly impressed on basal half; size larger, 8 or 



more mm. 



e. Basal impression of thorax broad, ill defined; beak with a fine 



but distinct carina; form robust; elytra without pubescent 



white spots. 499. LUPINUS. 



ee. Basal impression of thorax deep, sharply limited; beak wholly 



without carina; form more slender; elytra with pubescent 



white spots. 500. AMPLEXUS. 



del. Thorax not impressed on basal half; smaller and more slender, 



not over 7 mm. 501. LEPTOSOMUS. 



cc. Elytra, and often the thorax, without distinct marginal stripes of 



pale pubescence, 

 f. Form short, broad, more or less oval, elytra never more than 



twice as long as wide; length less than 9 mm. 



g. Beak finely but distinctly carinate; elytra with a deep, parallel- 

 sided basal impression. 502. MARGIJ\ T ATUS. 

 gg. Beak not at all carinate. 



/;. Beak very finely and rather densely punctate; elytral punc- 

 tures separated by twice or more their own diameters. 



503. MUSCULUS. 



7(7). Beak rather coarsely and roughly punctate; elytral punctures 

 separated by scarcely more than their own diameters. 



504. PUNCTINASUS. 

 //. Form elongate, generally subparallel, the elytra distinctly more 



than twice as long as wide. 



i. Thorax broadly flattened and impressed throughout its length 

 or nearly so, the impression always deeper on basal half; 

 length 9.5 or more mm. 



/. Form more slender; beak very slender in female, longer than 

 thorax: elytral impression deep. 505. COXCAVUS. 



jj. Form robust; beak stout, subcarinate, subequal in length to 

 thorax in both sexes; elytral impression not deep. 



506. MUCIDUS. 

 ii. Thorax impressed only near base. 



k. Beak not at all carinate; vestiture of elytra hair-like; thorax 



very coarsely cribrate-punctate; length less than 9.5 mm. 

 7. Beak very long and slender, as long as thorax in male, 

 longer in female; thorax with sides feebly rounded in 

 front. 507. SYLVIUS. 



77. Beak short and stout, distinctly shorter than thorax in 

 both sexes; thorax with sides parallel on basal three- 

 fourths. 508. SCIIOBICOLLIS. 

 7.- 7v\ Beak distinctly carinate; vestiture of elytra scale-like; 

 length 10 10.5 mm. 509. MORULUS. 



497 (8489). Lixus CAUDIFER Lee., 1876, 156. 



Elongate, narrowly oval, robust. Black, everywhere densely clothed 

 with fine, short, gray pubescence; antenna? and tarsi dark reddish-brown. 

 Beak slender, shorter than thorax, its apical third polished in male. Second 

 joint of funicle slightly longer than third and fourth united. Thorax coni- 

 cal, at base slightly wider than long, sides gradually converging to apex; 



