SCARAB BEETLES — CARTWRIGHT 521 



Key to species of Bolhynus of the United States 



Apex of prosternal process behind anterior coxae completely hairy; smaller 

 species usually less than 18 mm. in length 2 



Apex of prosternal process at least partly nude; larger species usually more 

 than 18 mm. in length 5 



Outer anterior face of fore tibia smooth adjacent to longitudinal row of coarse 

 setigerous punctures (fig. 6/) 3 



Outer anterior face of fore tibia closely, finely to roughly punctulate adjacent 

 to longitudinal row of coarse setigerous punctures (fig. 6e) 4 



Punctures of pronotum and elytra very coarse; habitus as in gibbosus 

 (DeGeer); coastal plain; North Carohna to Louisiana. 



ncglectus LeConte 



Punctures of pronotum and elytra fine to very moderate; habitus slightly more 

 elongate; found in sandy areas of seacoast; Massachusetts to Texas. 



morio LeConte 



Hind tibia short and wide, length of inside edge usually less than twice as long 

 as apical width; first segment of posterior tarsus apically noticeably widened 

 laterally, the width often more than the length of the 2d segment; punc- 

 tures of elytra not so noticeably annular, closer and smaller, more nearly 

 uniform near margin around apical third; pronotum noticeably convex 

 below lateral margins; larger than typical gibbosus; usually west of Rocky 

 Mts gibbosus obsoletus LeConte 



Hind tibia longer and not so wide, length of inside edge more than twice the 

 apical width; first segment of posterior tarsus with sides nearly straight, 

 not wider than length of 2d segment; elytral punctures usually distinctly 

 annular; pronotum not noticeably convex below lateral margin; east of the 

 Rocky Mts gibbosus gibbosus (DeGeer) 



Pronotum without apical impression; male anterior claw joint swollen, the 

 anterior claw broad and abruptly bent at base 6 



Pronotum with at least a small apical impression; male anterior claw and its 

 joint normal .... 7 



Anterior tibia normal, only three large teeth; pygidium m^abriculate and 

 closely, finely to moderately punctate at base and sides; middle and north- 

 eastern United States, eastern Canada relictus (Say) 



Anterior tibia with an additional small but distinct tooth between the 2d and 

 3d large teeth; pygidium moderately coarsely punctate, the punctures 

 evenly scattered throughout, a very little scabriculate sculpture at extreme 

 base; southern Texas sallaci (Bates) 



Frontal carina widely interrupted at middle and joining lateral carina at sides; 

 clypeal teeth widely separated; size moderate, 14 to 20 mm.; tip of Florida 

 and West Indies cuniculus (Fabricius) 



Frontal carina interrupted but not reaching sides, or reduced to two widely 

 separated, conical tubercles; clypeal teeth usually separated by less than 

 their basal width; size large, 24 to 29 mm 8 



First wide elytral interval outside sutural stria smooth and shining, rarely 

 with fine punctures but always without the coarse punctures found on the 

 next two intervals lacvicollis (Bates) 



First wide interval with coarse punctures as found on next two 9 



