HlSTERID/E 213 



long, not inflated posteriorly and extending slightly behind the 

 middle; head and mandibles with the punctulation extremely mi- 

 nute, sparse, the anterior impression broad and feeble, the frontal 

 part of the entire stria transverse or just visibly and broadly sinuous; 

 prothorax with the usual outline, the feebly arcuate sides gradually 

 rounding anteriorly; surface closely and confusedly punctate along 

 the basal margin; outer lateral stria fine, apical, not extending to the 

 middle, the inner remote from the outer, fine and attaining the basal 

 punctures, the wide flat space between the inner stria and the margin 

 extremely minutely, evenly and sparsely punctulate throughout; 

 elytra only about a fourth wider than long, not inflated subbasally, 

 the striation throughout almost exactly as in the preceding species, 

 the sutural stria relatively shorter, being subequal to the apical 

 fourth and fifth and in transverse line with them; pygidia rather 

 coarsely, very deeply and closely punctate, propygidium with two 

 small basal areas at each side almost devoid of punctures; prosternal 

 lobe obtusely rounded, the marginal bead broad laterally, becoming 

 extremely fine at the middle of the apex; mesosternal sinus deep; 

 hind tibia? moderately slender, the anterior obtriangular, with five 

 subequal external serrules, each bearing a short obtuse pale spine. 

 Length 4.8 mm.; width 3.2 mm. Washington State.. . electus Csy. 



Besides the fourteen species above denned from material at 

 hand, there are four other described species belonging to this 

 subgenus as follows: 



Hister instratus Lee. Somewhat similar to biplagiatus though much 

 larger, 7-8 mm. in length according to LeConte, but probably overstated. 

 The lateral fringe of the prothorax is unusually dense and the external 

 spines of the hind tibiae more close-set and numerous than in allied 

 species; the hind femora are more swollen and pallescent; it occurs in 

 Kansas. It is inscribed, probably in error, as a synomym of biplagiatus 

 in the Bickhardt catalogue. 



Hister gloved Horn Stout, the pronotum with two entire striae, ciliate 

 at the sides; elytra with three entire discal and a short sutural stria; 

 subhumeral obsolete, replaced by a few punctures; prosternal lobe 

 acutely produced; hind tibiae as usual. Length 6.5 mm. Kansas and 

 Oklahoma. The type was said to be entirely black, but it was added that a 

 specimen in the LeConte collection had red and black elytra. I have 

 never noticed any marked variation in the coloration of the elytra of 

 these red and black species. Sometimes a saturation with exuded grease 

 will obscure the coloration. 



Hister lucanus Horn Prothorax sparsely fimbriate; lateral pronotal 

 striae both entire; base coarsely punctured; elytra colored nearly as in 

 biplagiatus, having three entire discal striae, the sutural extending in 

 front of the middle; subhumeral wholly wanting; anterior tibiae triden- 

 tate; hind tibiae as usual; body beneath and legs black. Length 3 mm. 

 Cape San Lucas, Lower California. 



Hister simplicipes Fall The original description of this species (Occ. 

 Papers Cal. Acad., 1901, p. 235) answers almost completely to the species 



