June, 1898.] Casey: North American Coleoptera. 79 
than those of the pronotum, with the impressed lines distinct; head with the 
clypeal margin moderately reflexed and broadly sinuato-truncate in both sexes ; 
prothorax two-fifths wider than long, the sides feebly convergent, rather more 
rounded near the base; elytra one-half longer than wide, fully twice as long as 
the prothorax and just visibly wider posteriorly. Length 1.8-2.75 mm.; width 
0.8-1.2 mm. Pacific coast—Vancouver Island, Washington State (Tacoma) and 
California (Humboldt Co. and Alameda). impressa, sp. nov. 
7— Body rather stout, strongly convex, oblong-suboval, shining, blackish in color 
throughout, the legs and antennae dark rufous; vestiture very short and almost 
scale-like, erect as usual; head moderate, the eyes well developed, convex and 
prominent; prothorax one half to three-fifths wider than long, the sides rather 
widely reflexed, slightly convergent and broadly, evenly arcuate throughout, the 
basal angles very obtuse ; surface finely, closely punctured but polished; elytra 
more than one-half longer than wide, nearly two and one-half times as long as 
the prothorax and very slightly wider, the humeral callus small; surface con¬ 
fusedly rugubse, finely punctate and with slightly evident longitudinal lines and 
short transverse rugos. Male. —Head concave, the clypeal margin reflexed and 
broadly bidentate; prothorax impressed transversely at the apical margin, the 
latter moderately reflexed, with a small rounded sinuation at the middle. Fe¬ 
male. —Head flat, the clypeal margin very slightly reflexed, broadly, feebly 
sinuato-truncate, the prothorax rounded and unmodified at apex. Length 2.2- 
2.5 mm.; width 0.9-1.1 mm. Rhode Island (Boston Neck), .pistoria, sp. nov. 
8 — Anterior tibiae finely everted and acute externally at apex.9 
Anterior tibiae simple at apex .10 
9— Pronotum not impressed at the apical angles, the flanks deeper, the side margin 
feebly reflexed, more strongly about the basal angles. Female. —Body elongate- 
oval, moderately convex, piceous, the elytra black; legs and antennae paler, 
rufous, shining, the bristles short and pale, moderately abundant, not arranged 
in definite series on the elytra though with feeble suggestion of such arrange¬ 
ment at certain parts; head moderate, the eyes small, the clypeal margin broadly 
arcuate; prothorax nearly as long as wide, circularly arcuate in apical third, the 
sides thence nearly straight and parallel to the basal angles, which are very ob¬ 
tuse; base arcuate; punctures rather fine, strong and close-se ; elytra three- 
fourths longer than wide, two and one-third times as long as the prothorax and 
scarcely wider; punctures fine, strong, close-set, the impressed lines distinct and 
with rather coarser irregular punctuation. Length 2.3 mm.; width 0.8 mm. 
Colorado (Salida). striolata, sp. nov. 
Pronotum impressed at the apical angles, the side margins strongly, narrowly and 
equally reflexed throughout. Female. —Nearly similar to striolata but shorter, 
the prothorax fully one third wider than long, with the sides subparallel, evenly 
and feebly arcuate throughout, the apex broadly, evenly arcuate; punctures fine, 
strong and rather close-set; elytra two-thirds longer than wide, two and one-half 
times as long as the prothorax, the surface polished, with distinctly impressed 
lines of much coarser punctures, which are shallow, nude and variolate as usual, 
the bristles arranged more definitely in series. Male. —Smaller than the female 
and more slender, the clypeal margin rather strongly rounded near the eyes and 
remotely and feebly bituberculate at the middle; prothorax only slightly shorter 
4 
