HlSTERID^E 211 



represented at apex and sometimes still more briefly at base, the 

 sutural short, generally post-medial, the humeral and subhumeral 

 wholly wanting, the oblique humeral long and fine but distinct; 

 propygidium evenly, feebly convex from side to side, the punctures 

 moderately coarse, always widely and irregularly separated, those 

 of the pygidium not quite so large but deeper and less separated; 

 prosternal lobe not very broadly rounded and broadly margined, 

 the mesosternal sinus deep. Length 4.8-5.5 mm.; width 3.6-4.0 

 mm. New Jersey to Kansas (Salina). Four examples. 



biplagiatus Lee. 



Form more narrowly oblong-oval, the coloration similar, except that the 

 legs are rufo-piceous and the black plaga of the elytra shorter than 

 wide, rather more inflated posteriorly and extending barely behind 

 the middle; head with entire ambient line, the punctulation rather 

 close except basally, the mandibular punctures dense and distinct; 

 prothorax somewhat narrower than in the preceding, the sides almost 

 evenly continuing those of the elytra in curvature, gradually more 

 rounding anteriorly; lateral stria entire, about midway between the 

 margin and the inner stria, which almost attains the base and is there 

 hooked inwardly to some degree, the intervening surfaces nowhere 

 rugulose, the three widely spaced punctures inside of the marginal 

 stria distinct; elytra a third wider than long, the sides very evenly 

 arcuate, more converging posteriorly, the three entire striae moderate 

 and somewhat crenulate, the fourth and fifth completely wanting 

 and without vestige, the sutural distinct from basal third to apical 

 fifth, the humeral and subhumeral completely wanting, the oblique 

 humeral long, very fine; propygidium coarsely, sparsely and unevenly 

 punctate, the surface impressed near each side posteriorly; pygidium 

 with coarse, deeper and close-set punctures, becoming fine and sparse 

 posteriorly; prosternal lobe moderately rounded, finely margined; 

 mesosternal sinus deep; hind tibiae with the external spinules widely 

 spaced; lateral fringe of the prothorax short. Length 4.7 mm.; 

 width 3.4 mm. Iowa iowensis n. sp. 



ii Outline evenly elongate-oval, the sides of the prothorax and elytra 

 even in curvature; body and legs deep black, the anterior tibiae 

 rufescent; red areas of the elytra not quite attaining the sides or apex, 

 the basal black plaga wider than long, lobately inflated posteriorly; 

 head smooth, the ambient stria fine but entire, the mandibles rather 

 long, smooth; prothorax of the usual form in the preceding species 

 but more convex along the sides, the three punctures adjoining the 

 very fine marginal stria; inner lateral stria remote from the margin, 

 slightly sinuous, the outer very short and apical, widely separated 

 from the sides, the latter not fimbriate as they are in the preceding 

 section; elytra of the usual outline, strongly arcuate at the sides, 

 the three entire striae coarse and impressed, the fourth feebly trace- 

 able near base and apex, the fifth wanting, the sutural crenulate, 

 extending from before the middle nearly to the apex, the humeral 

 and subhumeral wholly wanting; propygidium somewhat coarsely 

 but sparsely punctate, more finely medially, the pygidium very 

 moderately and loosely throughout; mesosternal sinus deep; hind 



