190 MEMOIRS ON THE COLEOPTERA 



fine punctures of the general surface more distinct, the very large 

 and deep, rugosely punctured fovese and the narrow concave side 

 margins almost similar, the latter not quite so broad; elytra nearly 

 similar but with the striae suturally more deeply impressed and with 

 more convex and more shining intervals, the latter laterally not 

 quite flat, opaque and finely, suffusedly but not distinctly punctulate 

 throughout; apical sinus rather deep and distinct; hind tarsi nearly 

 similar. Length (9) 12.7 mm.; width 5.0 mm. Oregon (without 

 further indication of locality) sinuatus n. sp. 



20 Form and facies nearly as in calif ornicus but a little larger and some- 

 what stouter, very shining throughout (cf), or with the elytra 

 opaculate and less deeply striate ( 9 ) ; head nearly as in cali- 

 f ornicus but relatively somewhat larger and with slightly larger 

 eyes, the antennae notably thicker in both sexes; prothorax as in 

 californicus but relatively larger and with the minute sparse 

 punctulation everywhere barely traceable, the foveae similar, rather 

 deep and also coarsely punctate, gradually finely so toward their 

 boundaries, the surface between them and the sides more convex and 

 much more minutely punctulate; marginal gutter of the same kind 

 but finer, extending nearly to the base; elytra as in californicus 

 but broader, not quite so elongate, the tarsi nearly similar, the basal 

 joint with a few punctures on its upper surface. Length (cf 9 ) 12.3 

 12.8 mm.; width 4.6-4.8 mm. Utah (Provo), Wickham. Six 

 examples paganicus n. sp. 



Form much less elongate than in either californicus or paganicus, only 

 moderately convex; head relatively smaller than in californicus 

 but otherwise nearly similar, the antennae notably shorter and 

 thicker; prothorax nearly similar in outline but less transverse, only 

 about a third wider than long, the marginal gutter not so broad 

 as it is in californicus, the convexity between the foveae and the 

 sides narrower and stronger, the fovese narrower, rather deep, closely 

 but not so coarsely punctate, the entire surface, excepting the foveae, 

 almost devoid of punctuation; elytra only about two-fifths longer 

 than wide, parallel, with feebly arcuate sides and very obtuse apex, 

 relatively much wider than usual, being fully a third wider than the 

 prothorax, with the base at the sides broadly exposed; surface very 

 smooth, densely opaque and without trace of minute punctulation, 

 the striae fine, the intervals flat, slightly convex and with deeper striae 

 near the suture basally but only slightly so apically; metasternum 

 laterally with fine punctuation but scarcely rugose; hind tarsi of the 

 usual form in the preceding species. Length (9 ) 10.8 mm.; width 

 4.2 mm. Nevada (Reno). A single example taken by the writer. 



humeralis n. sp. 



21 Form oblong-suboval, rather convex, shining, blackish throughout 

 above (cf ), with more or less distinct metallic green lustre, or ( 9 ) 

 less metallic above, with the elytra sericeo-opaque; under surface 

 and femora black when mature, the tibiae, tarsi and epipleura rufes- 

 cent; head rather small, half as wide as the prothorax, smooth, the 

 foveae rather large, deep, irregularly subtriangular; antennae rather 

 slender, nearly black, the two basal joints bright testaceous; pro- 



