HlSTERID/E 207 



2 Surface between the lateral thoracic striae with ruguliform lines an- 

 teriorly 3 



Surface between these striae smooth or nearly so 4 



3 Rufous areas of the elytra far removed from the sides and apex; hind 

 tibiae very broad distally. Body very broadly oblong-oval, convex, 

 shining, black, the femora.rufous except at base and apex; head smooth, 

 the ambient stria generally entire; epistoma with a small feeble im- 

 pression basally; mandibles with extremely minute and very remote 

 punctulation; prothorax fully three-fourths wider than long, the sides 

 moderately converging and very evenly arcuate from base to apex, 

 the fulvous fringe long, coarse and conspicuous; surface smooth, the 

 lateral striae coarse; elytra distinctly shorter than wide, one-half 

 longer than the prothorax and, near basal third, evidently wider, 

 the sides arcuate, more converging posteriorly, the apex broadly, 

 angularly sinuate; surface very smooth; striae one to three entire, 

 the fourth represented by only a short line at base; sutural stria not 

 attaining apex and broadly obsolete basally, the humeral wholly 

 wanting, the subhumeral short and not attaining the base; propy- 

 gidium with rather large, well separated and very shallow punctures, 

 almost wanting along the middle, the pgyidium convex, rather 

 coarsely, very shallowly and loosely punctate basally, gradually 

 finely and sparsely distally; prosternal lobe very narrowly rounded; 

 mesosternal sinus deep. Length 6.8-7.3 mm.; width 4.8-5.2 mm. 



Atlantic sea coast arcuatus Say 



Rufous areas extending to the sides but not quite to the apex; hind tibiae 

 less broadly inflated distally; lateral fringe of the prothorax similarly 

 long and conspicuous. Body and legs black throughout, the elytra 

 rufous, except at apex and in a short medio-basal plaga, which is 

 inflated laterally behind; head with small and sparse punctures, the 

 ambient line evenly arcuate and unbroken on the front; prothorax 

 fully three-fourths wider than long, the outline as in arcuatus, the 

 two lateral striae widely separated, the included rugulae numerous 

 except basally, the outer stria not attaining the base, the surface 

 smooth; elytra in form and proportion nearly as in arcuatus, smooth, 

 each with three discal striae extending from the basal margin not 

 quite to the apex, the fourth represented only by a small indentation 

 near the base, the sutural only by a short subapical remnant, the 

 humeral and subhumeral wholly obsolete, the oblique humeral fine 

 and evident; propygidial punctures large, shallow, rather widely but 

 unequally spaced and replaced by minute sparse punctulation medi- 

 ally toward apex, those of the pygidium not so coarse but deep 

 and close-set, less coarse and sparser apically; prosternal lobe less 

 narrowly rounded than in arcuatus, the mesosternal sinus deep, the 

 anterior tibial teeth rounded at tip and the apical not at all bifid. 

 Length 4.8-6.0 mm.; width 3.4-4.4 mm. California, .sellatus Lee. 



4 Mandibles very minutely, sparsely punctate 5 



Mandibles minutely but more deeply, very closely punctate 9 



5 Sutural stria of the elytra wanting. Body rather broadly oblong-oval, 

 shining, black, the legs black throughout; head evenly and feebly 

 convex, with minute and very feeble punctulation, the ambient line 



