254 MEMOIRS ON THE COLEOPTERA 



when mature, black beneath, paler along the sides of the prosternum 

 and on the epipleura; head well developed, with moderate but very 

 prominent eyes; antennae rather thick, half as long as the body, 

 fuscous, paler at base; prothorax a third wider than long, rounded 

 at the sides anteriorly, the sides oblique and becoming straight 

 posteriorly, evidently sinuate for a short distance before the angles, 

 which though obtuse are therefore unusually prominent at their 

 apices; base narrower than the apex; surface convex, smooth, with 

 strong entire median line, the latero-basal region flattened and 

 closely punctate; elytra barely one-half longer than wide, nearly 

 one-half wider than the prothorax, the striae more or less impressed, 

 the intervals convex, feebly so externally and apically, rather strongly 

 toward the suture; hind tarsi slender, nearly as usual. Length (cf 9 ) 

 2.6-2.8 mm.; width 0.85-1.0 mm. Coast regions from San Diego 

 to Washington State. Very abundant. [Stenolopluis californicus 

 Lee.] californicus Lee. 



Body nearly as in californicus but more slender and with relatively 

 smaller prothorax, generally paler in color, rufo-piceous when mature ; 

 under surface as in californicus but somewhat paler in all its parts; 

 head relatively still larger, being only very slightly narrower than 

 the prothorax; antennae notably more slender, piceous, paler 

 basally; eyes prominent; prothorax relatively smaller than in cali- 

 fornicus, fully a third wider than long, the sides more broadly and 

 less strongly rounded anteriorly, the sinus before the basal angles 

 still more pronounced than in californicus, the angles prominent 

 but with their apices less acutely defined than in that species; the 

 angles might be said to be only slightly more than right, the sides 

 of the base oblique; surface throughout nearly similar; elytra more 

 elongate, three-fifths longer than wide, nearly three-fifths wider 

 than the prothorax, otherwise as in californicus; hind tarsi slender, 

 three-fourths as long as the tibiae. Length (9) 2.2-2.8 mm.; 

 width 0.8-0.95 mm. California (St. Helena, Sonoma Co.). Fort 

 Ross, on the coast of the same county, Mots. [Acupalpus "sy- 

 metricus" Mots.] symmetricus Mots. 



24 Form rather more elongate and more convex than in californiciis, 

 very shining and of the deepest black throughout, the sides beneath 

 not paler; head moderate, the eyes smaller and less prominent than 

 in californicus, the antennae much more slender and more than half 

 as long as the body, nearly black, dusky-testaceous at base; pro- 

 thorax nearly as in californicus in outline and size but more convex, 

 with the converging sides basally not sinuate for a sensible distance 

 before the angles as they are in that species, the angles obtuse though 

 with their apices strongly but minutely prominent; feeble latero- 

 basal impressions finely, less closely and less extendedly punctate, the 

 median stria very different, being short and broadly biabbreviated; 

 elytra in form and proportion as in californicus but more convex, 

 with finer, less impressed striae and much less convex, in fact nearly 

 flat, intervals, the discal puncture strong, at three-fifths; hind tarsi 

 piceous, slender, moderate in length. Length (9 ) 2.85 mm.; width 

 i.o mm. California (Siskiyou Co.), Koebele ardelio n. sp. 



