354 A PreUminary Monograph of the 



California (Lake Talioe 1). 



A very distinct species, easily known by its shining, black in- 

 teguments and rather coarse, deep elytral punctuation. 



29 T. $cu1pUli§ n. sp. — Moderately slender and convex, black 

 throughout, knees and tarsi very slightly piceo-testaceous; pubescence 

 short, fine, and sparse; integuments shining. Head very distinctly 

 narrower than the prothorax, feebly convex, rather finely and densely 

 punctate; prominences short, strong; eyes moderate, rather convex and 

 prominent; tempora about three-fourths as long, strongly, evenly 

 rounded and about as prominent as the eye: antennae rather short and 

 slender, feebly clavate, about as long as the head and prothorax; second 

 joint as long as the next two together, fourth scarcely longer than wide, 

 tenth slightly transverse. Prothorax scarcely one-third wider than 

 long, widest at the middle, where the sides are very obtusely subangu- 

 late, thence extremely feebly convergent and nearly straight to the 

 apex, and rather strongly convergent and just perceptibly sinuate to 

 the base, which is feebly arcuate and nearly three-fourths as wide as 

 the disk; apex broadly arcuate and nearly as wide as the disk; the latter 

 very strongly longitudinally bi-impressed, the impressions distinctly 

 subinterrupted, rather finely punctate; punctures feeble, separated by 

 twice their widths, except near the sides, where they are coarser and 

 slightly denser, with the surface moregranulose; elevated area between 

 impressions devoid of punctures. Elytra slightly wider than long, about 

 one-third wider and longer than the prothorax, rather convex, im- 

 pressed near the suture, coarsely and deeply punctate, the punctures 

 separated by distinctly more than their own diameters; surface also 

 coarsely and feebly rugulose. Abdomen slightly narrower than the 

 elytra; sides parallel and very feebly arcuate; border moderate; surface 

 minutely and feebly reticulate, minutely and rather sparsely punctate. 

 -Legs slender. Length 2,1 mm. 



California (Sonoma and Lake Cos. 13). 



Distinguishable by its deep pronotal impressions, which are 

 unusually strong for this division of the genus. It is not 

 closely related to any other species here described. 



30 T. difflcilis n. sp. — Moderately slender and feebly convex, 

 castaneous; elytra piceous; antennae castaneous; legs slightly paler, 

 ferruginous; pubescence rather short and coarse, moderately dense, 

 finer, sparser on the abdomen; integuments rather shining. Head just 

 visibly narrower than the prothorax, rather convex, finely granulose 

 laterally, smoother and finely, sparsely punctate in the middle; promi- 

 nences rather strong, small; eyes small, somewhat finely faceted, mode- 

 rately convex; tempora broadly rounded, as long as and slightly more 



