June, is 9 s.] 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 rugre. 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-I.I mm. Rhode Island (Boston Neck) . . pistoria, sp. nov. 



"8 — Anterior tibiae finely everted and acute externally at apex 9 



Anterior tibice 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 antennce 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 sti-iolata 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 



