338 A Preliminary Monograph of the 



California (Sonoma Co. 1). 



A distinct species, easily known by its more robust form, 

 arcuately rounded tempora, which are not angulate behind, and 

 by its longer, coarser pubescence. 



18 T. arizonse n. sp. — Form rather robust; black, legs piceous, 

 tarsi laavescent ; antennae piceous, feebly fuscous toward base ; pubes- 

 cence fine, short and dense, but not conspicuous ; integuments rather 

 shining. Head narrower than the prothorax, very minutely and mod- 

 erately densely punctate, smooth, and scarcely at all alutaceous ; an- 

 tennal prominences short and feeble ; antennae slightly longer than the 

 head and prothorax together, slender; club gradual and feeble ; outer 

 joints strongly obconical, two to four uniformly and slowly decreasing 

 in length, tenth distinctly longer than wide ; eyes rather large, mode- 

 rately prominent; tempora scarcely more than one-third as long, poste- 

 rior angle not prominent, but also not rounded, obtuse. Prothorax widest 

 at apical two-fifths, where the sides are strongly rounded and subangu- 

 late, thence strongly convergent and nearly straight to the base, and 

 almost as strongly convergent to the apex ; base broadly, feebly arcuate, 

 two-thirds as wide as the disk, distinctly narrower than the apex ; the 

 latter broadly, feeblj', and evenly emarginate between the acute and 

 slightly dentiform apical angles ; basal angles obtuse, narrowly rounded; 

 disk distinctly less than one-half wider than long, very minutely punc- 

 tate, shining, the punctures distinctly separated ; impressions very 

 feeble, and nearly obsolete. Elytra qxiadrate, distinctly wider, and one- 

 half longer than the prothorax, very feebly impressed along the suture, 

 very finely punctate, the punctures generally separated by a little more 

 than their own diameters. Abdomen parallel, broad, but very slightly 

 narrower than the elytra ; sides straight ; border -moderately deep and 

 wide ; surface feebly convex, extremely minutely and densely punctate, 

 subalutaceous. Legs slender ; tarsi very short. Length 2.9 mm. 



Arizona (Tu9son 2). 



Kesembles armatus, but differs in its more robust form, finer 

 punctuation, and especially by the very much finer and denser 

 punctuation of the abdomen. It also differs in its less strongly 

 dentiform tempora and anterior angles of the prothorax, the 

 very much more feeble pronotal impressions, and the more 

 strongly obconical and slightly more elongate outer joints of the 

 antennae. 



Group III. 



The species here become rather closely allied, and are not 

 easily differentiated by description. The type described below 



