8. Middle tibiae of male unmodified, femora similar in the sexes, the 



posterior ones finely longitudinally sub-strigose like the others 9 



Middle tibiae of male sinuate within and produced inwardly at apex ; 

 front and hind femora dissimilar in the sexes, the latter without 



fine strigosity in either sex pedalis 



9. Form narrow, twice as long as wide, or even more, front claw of 

 anterior male tarsi not perceptibly modified, color of elytra nearly 

 uniform piccotestaceous to piceous brown. 



Front tarsi of male narrowly dilated, size smaller (2.8 mm.) artus 



Front tarsi of male broader, size larger (3.7 to 4.2 mm.) sharp! 



Form less elongate, varying from very distinctly less than, to nearly 

 twice as long as wide, front claw of anterior male tarsi perceptibly 

 modified. (Male of ovoideus not yet known.) 10 



10. Front tarsi of male scarcely wider than the female, the anterior 

 claw unmodified; size small (3.1 to 3.3 mm.), (Lake Superior, H. 



B. Territory, Manitoba. ) suturalis 



Front tarsi of male rather narrowly dilated, but evidently wider than 

 in the female; anterior claw of front tarsi in the male slightly 

 thicker and more abruptly bent at base; (ovoideus provisionally 



placed, <$ not yet known.) 11 



Front tarsi of male wider, the second joint conspicuously dilated, 

 anterior claw evidently modified 12 



11. Species of the Lake Superior and Manitoba region. 



Color above nearly uniformly rufotestaceous, the sutural edge 



of the elytra blackish; length 3.5 mm. (Lake Superior.) ovoideus 



Color above nearly uniformly piceo-testaceous, the elytral suture 



fainty paler basally; length 3.5 to 4 mm. (Manitoba.) canadensis 



Color of thorax often in great part blackish, of elytra pale 

 testaceous with a large, sharply defined piceous discal blotch 



behind the middle. (Dakota; Manitoba.) sellatus 



Species of the Pacific Coast and Sonoran region. 



Color above testaceous with large elytral cloud extending nearly 

 to base ; form slightly narrower, the size as a rule, a little smaller 



than the next lutescens 



Color nearly as in the preceding but with the elytral cloud less 

 extended basally as a rule ; the elytral markings very variable in 



development, sometimes nearly wanting I medialis 



Color above yellowish testaceous, elytra with faint posterior 

 dorsal cloud. Length 3.6 mm. (Utah.) virgo 



12. Brownish yellow, the elytra darker with obscure discal markings 

 behind the middle. (Washington; Oregon.) obscureplagiatus 



13. Front tarsi of male less widely dilated, not quite as wide as the 



tibial apex collatus 



Front tarsi of male subequal in width to the apex of the tibia. 



Head with vertex and sides of front more or less piceous. 



Size smaller (3% mm. more or less.) patruelis 



Size larger (5 mm.) infuscatus 



Head entirely pale except for a small transverse occipital spot. 

 Size larger (over 4 mm.) and form more elongate. 



Femora of male normally feebly sinuate beneath near 



the knee, tibiae not pedunculate nubilus 



