June, 1898.] Casey : North American Coleoptera. 81 



elytra two-thirds longer than wide, equal in width to the prothorax and barely 

 twice as long, obtuse at apex ; series of coarse punctures scarcely impressed. 

 Female. — Nearly similar to the male, the clypeal margin evenly arcuato-truncate, 

 the prothorax not modified. Length 2.4-2.9 mm.; width 0.9-1. 1 mm. Utah 



(southwestern) mormon ica, sp. nov. 



Sides of the prothorax subparallel and evenly arcuate throughout. Male.— Similar 

 to mormonica in the modifications of the clypeus and prothorax, pale piceous, 

 polished, the bristles long, stiff and erect, subserial on the elytra; eyes small ; 

 prothorax fully one-third wider than long, the angles obtuse; punctures moder- 

 ately fine, deep, somewhat uneven in size, rather close-set; elytra less than twice 

 as long as wide, as wide as the prothorax and barely twice as long ; punctures 

 rather coarse and close-set, the larger only partially forming indefinite and 

 scarcely at all impressed series. Length 2.0 mm ; width 0.85 mm. Pennsyl- 

 vania (Westmoreland Co.) horridula, sp. nov. 



15— Body obese and strongly convex, suboval; male sexual characters pronounced, 

 the female also having the apex of the prothorax at least feebly bilobed; apical 



angles of the anterior tibiae everted and acute externally 16 



Body subcylindric, convex ; male sexual characters feeble, the clypeus finely bitu- 

 berculate; maxillary palpi slender; prothorax margined at base, the angles 



obtuse 21 



16 — Clypeus angulate at each side near the eyes in both sexes 17 



Clypeus emarginate in the middle and bidentate, not angulate near the eyes 20 



17 — Elytra very nearly one-half longer than wide 18 



Elytra very short, scarcely one-third longer than wide 19 



18 — Elytral punctures rather close-set. Male with the clypeal margin reflexed and 

 quadridentate, the apex of the prothorax with two broad porrect triangular pro- 

 cesses, separated by a rounded sinuation. California vitula Mann. 



Elytral punctures rather sparse, the integuments more shining. Female. — Body 

 elongate-oval, very convex, polished, castaneous, the legs, antennae and some- 

 times the anterior parts paler ; bristles of the prothorax very small and rather 

 fine, not conspicuous, of the elytra coarse, moderately long and rather sparse; 

 head concave apically, the clypeus broadly rounded and obscurely quadrangulate ; 

 eyes rather small ; prothorax one-fourth wider than long, the sides feebly con- 

 vergent and very feebly, evenly arcuate from base to the rather obtuse but some- 

 what prominent apical angles ; base transverse, very feebly lobed at the middle, 

 very finely margined ; apex advanced, rounded and feebly bilobed ; punctures 

 fine and moderately close ; scutellum obtuse, wider than long ; elytra as wide as 

 the prothorax and slightly less than twice as long, perfectly even, the punctures 

 deep, very much larger than those of the pronotum. Length 2.3-2.5 mm.; 



width 1. 15 mm. California (Humboldt Co.) illustris, sp. nov. 



19 — Female. — Body stout, oval, strongly convex, pale in color, polished, the elytral 

 bristles very short, those of the prothorax rather inconspicuous ; head nearly as 

 in illustris, less concave anteriorly, the eyes very small ; prothorax nearly as 

 in illustris but shorter, nearly one-half wider than long, the punctures very 

 small and rather sparse ; surface occasionally with a very obsolete median 

 canaliculation near the apex; elytra very short, scarcely two-thirds longer than 

 the prothorax, strongly convex, obtusely rounded behind, the punctures rather 



