321 

 Leech and Chandler: Coleoptera 



18. Tooth of anterior claw of front tarsi of male outstand- 

 ing, nearly median in position (fig. 13:17c/); Pacific 

 Coast lutosua LeConte 1853 



— Tooth subapical, not standing out at an angle (fig. 



13:17e); California to Wyoming 



griseipennis LeConte 1859 



19. Elytra black, sharply margined with reddish-yellow; 

 pronotum rufotestaceous with an anterior and posterior 



transverse black band; U.S 



(in part) disintegratus (Crotch) 1873 



— Color not as above 20 



20. Front tarsi of male feebly dilated, 3rd segment scarcely 

 wider than 4th; epipleurae pale; northwest U.S. nnd 

 Canada approximates Fall 1922 



— Front tarsi of male rather strongly dilated, 3rd segment 

 evidently wider than 4th, though less than twice as 

 wide; epipleura in great part black 21 



21. Side of pronotum (viewed laterally) inflated anteriorly; 

 lateral margin of pronotum very narrow at base, pro- 

 gressively wider anteriorly; California 



hoppingi Leech 1942 



— Side of pronotum not inflated anteriorly; lateral margin 

 of nearly uniform width 22 



22. Elytral reticulation fine, meshes even, small, every- 

 where rounded and alike; California 



(sp. near smithi Brown 1930) 



— Elytral reticulation fine, meshes of at least discal 

 area obviously unequal and of irregular form 23 



23. Smaller species (less than 7 mm. long), flatter; apical 

 3rd of median lobe of male genitalia laterally com- 

 pressed, nearly parallel-sided in dorsal or ventral 

 view (fig. 13:17/); British Columbia to California . . . 



ancillus Fall 1922 



— Larger species (7.0-8.5 mm.), more convex; median 

 lobe of male genitalia gradually narrowed from near 

 base to apex, or broad, and nearly parallel-sided to 

 near apex, thence sharply narrowed 24 



24. Larger, broader species, averaging 8 mm. long; median 

 lobe of male genitalia flat in basal two-thirds of concave 

 side (fig. 13:17c;); San Diego to San Francisco, chiefly 

 coastal obsoletus LeConte 1858 



— Smaller, narrower species, averaging 7 mm. long; 

 median lobe of male genitalia rounded in basal two- 

 thirds of concave side (fig. 13: 17A) 25 



25. Prosternal process narrower, lanceolate, on only a 

 slightly different plane from narrow part between front 

 coxae, carina of presternum often continuing sensibly 

 onto base of it; Colorado, Utah, Nevada, Sierra of 

 California obliteratus LeConte 1859 



— Prosternal process broader basally, appreciably 

 cordate, and on a different plane from narrow part 

 between front coxae, carina of prosternum fading out 

 between coxae; San Francisco northward 



morosus LeConte 1 852 



For another key, see Fall, 1922. 



Key to the California Species of llyblus 

 Adults 



shortest distance between middle coxa and hind ooocsl 

 plate 3/4 width of latter, measured along same lin<-; 



(fig. 13: 10*); British Columbia to Texas 



glabrellus (Motschulsky) 1 859 



— Broadly oval; -elytra very finely punctate, punctures 

 less conspicuous than the reticulation; meshes irregu- 

 lar in size and shape, smaller and more numerous 

 than in glabrellus, most of them concave, giving 

 elytra a dimpled appearance; metasternal wings narrow, 

 shortest distance between middle coxa and hind coxal 

 plate less than 2/3 width of latter, measured along 



same line; British Columbia to California 



sculpturellus Z immermann 1919 



Genus Hydrotrupes Sharp 



Adults 



The single described species occurs in northern California 

 and in Oregon. Length 4-4.5 mm., black or slightly aeneous; 

 pronotum margined at sides; elytra finely lightly reticu- 

 late, with punctures at intersections; prosternal process 

 almost as broad as long, nearly flat, margined; hind 

 trochanters large, fully 1/2 as long as hind femora 

 palpalis Sharp 1 882 



Key to the California Species of Copelatus 



Adults 



1. Each elytron with 10 discal striae (a shorter sub- 

 marginal one not being counted); southwest U.S., 

 ?California impressicollis Sharp 1882 



— Each elytron with 8 discal striae; southwest U.S., 

 Imperial County .... chevrolati renovatus Guignot 1952 



Key to the California Species of Coptotomus 



Adults 



1. Form elongate-oval, nearly parallel-sided; color testa- 

 ceous marked with black or piceous. Metasternum 

 broad at narrowest point behind a middle coxa, wider 

 than an epipleuron; each hind coxal process notched 

 at about mid-point of hind margin; pronotum flattened 

 or slightly depressed near sides, margins appearing 

 slightly explanate; northwest North America, Lassen 

 County longulus LeConte 1852 



— Form evenly ovate, widest at middle; color decidedly 

 ferrugineous, marked with rufopiceous. Metasternum 

 behind a middle coxa not as broad as an epipleuron; 

 hind coxal processes notably broad, hind margins 

 not notched; sides of pronotum not at all explanate; 

 Arizona, California, Yuma region 



difficilis LeConte 1852 



1. Hind tarsal segments of male margined externally 

 above; last sternite of female very shallowly emar- 

 ginate apically; Pacific Coast 



quadrimaculatus Aube 1838 



2. Hind tarsi of male not margined; last sternite of female 

 with a deep triangular emargination; northwest America 



fraterculus (LeConte) 1862 



Key to the California Species of Agablnus 



1. Ovate; elytra finely punctate, punctures more con- 

 spicuous than the lightly engraved reticulation; lines 

 of reticulation fine, meshes irregular in size and 

 shape, not at all concave; metasternal wings broad, 



Key to the California Species of Rhantus 

 Adults 



1. Head solidly black between and behind eyes 2 



— Head with transverse bilobed yellow or reddish spot 

 between hind margin of eyes 3 



2. Metasternum and hind coxal plates piceous or black; 

 pronotum with a median black spot; California 



consimilis Motschulsky 1859 



— Metasternum and hind coxal plates flavous to piceo- 

 ferrugineous, pronotum usually without a median 

 black spot; north U.S tostus LeConte 1866 



3. Black above and below, mouth parts and legs slightly 

 paler, antennae and 2 median spots on head rufous; 



