24 COLEOPTERA — RHYNCHOPHORA. 



Antennal club normal in both sexes. 



Femora not toothed, the anterior ones obliquely impressed at base 

 on the posterior face ; hind angles of thorax feebly produced 



and scarcely at all everted Group cuneiformis. 



Femora toothed, not impressed at base ; hind angles of thorax more 



or less produced and divergent Group lecontei. 



Antennae inserted approximately at basal two-fifths of the 

 beak in the cf , and at basal one-third in the 9 . 



Subgroup lecontei. 



Antennae inserted at or slightly behind the middle in the cf , 



a little more posterior in the 9 , usually at or near basal 



two-fifths Subgroup gentilis. 



Antennae inserted distinctly beyond the middle in the cf, and 



at about the middle in the 9 Subgroup alutacea. 



Antennal club in the cf greatly elongate and thickly clothed with 

 erect pile barbicornis. 



Group CUNEIFORMIS. 

 Blue, moderately shining, first and second funicular joints subequal, 

 the first not much stouter. Length S|-8 mm.. cuneiformis. 

 Black. 



Elytral intervals wider than the striae, except occasionally in his- 

 poides . 

 First and second funicular joints subequal, the first not or 

 scarcely wider than the second ; strial punctures of elytra 

 smaller, intervals perfectly flat and nearly three times as 

 wide as the punctures at middle of disk ; body beneath 



densely punctate. Size large, 6 mm iliorio. 



First funicular joint much stouter than the second ; strial punc- 

 tures of elytra larger, the intervals flat or slightly convex 

 and from one to two times as wide as punctures at middle 

 of disk ; body beneath rather sparsely finely punctate ; size 



smaller, 3-4| mm liispoides. 



Elytral intervals narrower than the striae ; punctuation coarse ; 

 size 4|-5| mm perforatus. 



Group LECONTEI. 



Subgroup lecontei. 

 Size larger, 3^-7 mm. ; color typically rather brilliant blue or blue- 

 green lecontei. 



Color purpureo-violaceous, varying to green var. superba. 



Color black throughout var. tenebrosa. 



Color black, elytra dark blue or bluish-black. ..var. tinctipennis. 

 Size smaller, 3-4 ram. ; black throughout, or with the elytra faintly 

 bluish. 



