166 MEMOIRS ON THE COLEOPTERA 



and very moderately arcuate, the apex broadly and subcircularly rounded; 

 punctures notably coarse and deep, well separated in even and feebly 

 impressed series, the intervals with remote and excessively minute 

 punctulation; metasternum coarsely and sparsely, and the met-episterna 

 similarly coarsely but closely, the abdomen finely and not very closely, 

 punctate, the latter with the hairs moderately evident. Length 4.0-4.5 

 mm.; width 1.81.95 mm. Colorado (Levette collection and from an 

 unrecorded source). 



The two examples represent a species allied to californica but 

 differing in the smaller head, in the anterior spot on the pronotum, 

 less close-set punctures of the elytral series, pale mesosternum and 

 much more depressed form of the body; the sculpture of the under 

 surface also differs very much from that of californica, where also 

 the hind body beneath is usually deep 



Triplax mormonalis n. sp. Body elongate, more convex than in the 

 preceding, shining, the head and antennae rufous, the former with a faintly 

 nubilous darker frontal area at the middle and the club of the latter 

 slightly infuscate, the prothorax piceo-rufous, broadly darker medially 

 above and blackish, paler laterally, beneath, the elytra black, pale at 

 apex and nubilously so at base, with the scutellum pale; epipleura piceous; 

 hind body beneath piceo-rufous, with the abdomen blackish, pallescent 

 peripherally, the legs pale throughout; head large, nearly two-thirds as 

 wide as the prothorax, rather finely but strongly, somewhat closely 

 punctate, the eyes moderate; antennae nearly as long as the head and 

 prothorax, the third joint barely twice as long as wide and much shorter 

 than the next two, the eighth distinctly elongate; first joint of the club 

 obtriangular, not as wide as the second, both more or less transverse; 

 prothorax three-fourths to four-fifths wider than long, the sides very 

 feebly converging from the base and almost perfectly straight, rounding 

 inward at apex, where the moderately advanced and rather blunt angles 

 have a remarkably developed dorsal thickening, bearing the usual coarse 

 fovea; apex transverse between the angles, the base finely margined and 

 broadly, feebly and gradually lobed medially; punctures rather coarse 

 and close-set laterally, becoming fine and sparse medially; elytra at base 

 perceptibly wider than the thoracic base and, at the middle, still wider, 

 one-half longer than wide, the parallel sides broadly, evenly arcuate, 

 gradually more converging behind about the middle, the apex broadly 

 rounded; punctures only moderate in size but deep and close-set, in very 

 even and wholly unimpressed series, the intervals with excessively minute 

 punctulation frequently in irregular single line; prosternum and anterior 

 half of its side-pieces coarsely and closely punctate, the posterior half of 

 the latter abruptly impunctate; metasternum and its episterna less 

 coarsely but strongly punctate, the latter more densely; abdomen finely, 

 loosely punctate and with conspicuous pubescence. Length 3.4-3.7 

 mm.; width 1.4-1.7 mm. Utah (Provo), Wickham. 



This species can be compared only with antica Lee., from Oregon, 



