28 MEMOIRS ON THE COLEOPTERA 



thorax small, but little wider than an elytron, a fourth wider than 

 long, the median stria fine, not extending beyond the feeble anterior 

 impression, the sides strongly reflexed; foveae small, very deep, 

 oblique, nearer the carina than the middle; elytra oval, not quite 

 one-half longer than wide, the striae fine, entire as usual, impressed 

 internally, very fine externally, the seventh not visible; foveae mod- 

 erate, asperiform, near basal and apical third. Length (cf) 3-5 

 mm.; width 1.4 mm. California (Gilroy Hot Springs, Sta. Clara 

 Co.) volatile n. sp. 



Sides of the prothorax with the posterior long oblique part broadly and 

 feebly sinuate to the right hind angles; prothorax larger, always 

 broader than an elytron 24 



24 Elytra deep black, not pale at tip, the opalescence barely detectable,, 

 shining; under surface black, the legs very pale. Head well devel- 

 oped, with rather narrow sulci, fully four-fifths as wide as the pro- 

 thorax, with moderate eyes; antennae fuscous, paler basally, four- 

 fifths as long as the elytra, the medial joints between two and three 

 times as long as wide; prothorax nearly a third wider than long, the 

 sides broadly rounded, feebly and broadly sinuate basally, the angles 

 right, sharp; base not wider than the apex; surface as in the other 

 species of this section, feebly punctulate at base, the foveae large, 

 elongate, at lateral fourth, deep, the carina shorter; elytra elongate- 

 oval, one-half longer than wide, one-half wider than the prothorax, 

 the sides arcuate, the apex narrowly rounded; striae fine, moderately 

 impressed, traceable at the sides, the foveae before basal and before 

 apical third. Length (cf 9 ) 3-5~3-7 mm.; width 1.4-1.55 mm. 

 British Columbia (Agassiz) impium n. sp. 



Elytra black to blackish-castaneous in color, always nubilously paler ex- 

 ternally at tip, shining but more opalescent 25 



25 Elytra notably inflated. Oblong-oval, shining, black, the elytra 

 piceous, pale apically; under surface blackish, the epipleura brown; 

 head scarcely three-fourths as wide as the prothorax, much narrower 

 than an elytron, the sulci rather deep, the juxtocular puncture large 

 and deep; antennae fuscous, pale at base, long and rather slender, 

 the medial joints nearly three times as long as wide; prothorax two- 

 fifths wider than long, the sides subprominently arcuate before the 

 middle, oblique posteriorly, becoming subparallel for some distance 

 before the right angles, the apical angles narrowly obtuse; surface as 

 in the preceding species, the fine basal punctures distinct, the foveae 

 at lateral fourth, very deep and elongate, the carina long and dis- 

 tinct; elytra one-half longer than wide or very nearly, one-half 

 wider than the prothorax, . oblong-oval, the striae entire, rather 

 deeply impressed and very minutely and obscurely subpunctulate 

 internally, obsolescent externally, the seventh untraceable; foveae 

 before basal and at about apical third. Length (o 71 9 ) 3-7~4-5 mm.; 

 width i. 6-1. 8 mm. California (San Francisco Bay to Humboldt 

 and Siskiyou) and Nevada (Reno). Abundan.t. Twenty-one ex- 

 amples parallelocolle Mots. 



A Similar to parallelocolle but shorter, with relatively still smaller 

 head and less transverse prothorax, the latter a fourth wider than 



