164 Trans. Acad. Sci. of St. Louis. 



as wide, nearly parallel, the sides straight, subequal in width to the 

 head, a fifth wider and nearly a third longer than the prothorax; under 

 surface of the head finely and rather closely punctate, the sutures as in 

 the two preceding species. Sexual characters of the venter of the 

 usual form, the inclined bristles of the fifth segment not arranged in a 

 regular transverse series near the apical margin, the notch of the sixth 

 circularly rounded, abruptly defined and rather more than three times 

 as wide as deep. Length 4.7 ram.; width 0.72 mm, California (Lalse 

 Co.) puberalum Csy. 



8 — Eyes very small, always at much more than twice their own length from 



the base of the head 9 



Eyes well developed, at scarcely more than twice their own length from the 

 base ; species very small 13 



9 — Sculpture coarse and close-set. Atlantic regions 10 



Sculpture very fine, the lustre alutaceous ; species large. Rocky Mts 11 



10 — Body moderately slender, parallel, dull in lustre, pale red-brown 



throughout, the legs and antennae concolorous; head as long as wide, 

 not inflated at base, the sides behind the eyes parallel and nearly 

 straight, the angles well rounded, the punctures rather coarse and 

 dense ; prothorax distinctly obtrapezoidal with the sides nearly straight, 

 obviously wider than long, slightly narrower than the head and with 

 equally close-set but rather less coarse, rugulose punctuation, which 

 partially obliterates the smooth median line, the angles rather narrowly 

 rounded; elytra somewhat longer than wide, wider than the head, a 

 fourth wider and three-fifths longer than the prothorax, the sides paral- 

 lel and nearly straight; under surface of the head with the usual 

 reniform punctures densely placed, the gular sutures very fine, not 

 impressed, approximate and gradually converging to the base. Male 

 not known. Length 4.2 mm.; width 0.72 mm. Pennsylvania. 



americanum n. sp. 



11 Prosternum as usual, not carinate except posteriorly between the coxae ; 



body rather stout, pale ochreo- testaceous throughout and dull in lustre, 

 the punctures very minute and close-set throughout but rather more 

 visible on the elytra and sparsest on the prothorax; head moderately 

 large, as long as wide, the sides behind the eyes broadly arcuate and 

 slightly convergent throughout to the basal angles, which are slightly 

 more than right and scarcely at all rounded, the base truncate ; antennae 

 fully as long as the head and prothorax combined, rather stout; pro- 

 thorax narrower than the head, somewhat wider than long, the sides 

 subparallel and nearly straight, the angles very obtuse but only mod- 

 erately rounded; elytra large, wider than the head, nearly a third 

 wider than the prothorax and fully one-half longer, a little longer than 

 wide, parallel; under surface of the head dull, densely, subrugosely 

 punctured, the gular sutures fine, scarcely impressed, gradually con- 

 verging to the base of the head, where they become narrowly sep- 

 arated. Length 4.5 mm.; width 0.8 mm. Colorado (Ouray), —Mr. 



Wickham inquilinum n. sp. 



Prosternum carinate throughout its length; basal angles of the head dis- 

 tinctly, though not very broadly, rounded; antennae somewhat long and 

 thick as in inquilinum - 12 



