164 Trans. Acad. Sct. 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 mm.; width 0.72 mm. California (Lake 
CO.) cece reve cece sececrecene otece cece cece cece cove sess spuverulum Csy. 
8 — Eyes very small, always at much more than twice their own length from 
the base Of the end <b .cicde oC of da do's Wis cud vhs Sd ENs sp Spe wel k mudbeb vewee Ie 
Eyes well developed, at scarcely more than twice their own length from the 
base; species Very SMAl]b. so 6s ons ceiascwncdcvwdevecieccus sauvesesicesieeho 
9 — Sculpture coarse and close-set. Atlantic regionS....-.cescceececee see ll 
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 2. 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, -..0.0cescecccccccccvccscerecevccessoeccoeIMQUINUMm N- sp. 
Prosternum carinate throughout its length; basal angles of the head dis- 
tinctly, though not very broadly, rounded; antennae somewhat long and 
thick a8 im inquilinwum.rsvecccecccceescvecccccesvsccscscsssecscesseeels 
