TENEBRIONID.E 139 



behind the middle, rather strongly narrowing with moderately 

 arcuate sides thence to the base, two-thirds longer than wide, the 

 sides rapidly rounding behind, the apical lobe distinct; surface very 

 feebly convex, with distinct indication of three fine raised lines on 

 each, the side margins sometimes extending almost to the apex; 

 abdomen smooth and shining, minutely, remotely punctulate, the 

 legs and tarsi moderate. Length (cf) 22.5-23.0, (9) 24.5-26.0 

 mm.; width (cf) 10.2-10.6, (9) 12.2-12.7 mm. Arizona (Oak 



Creek Canyon), F. H. Snow rudis n. sp. 



Elytra with the very coarse punctures isolated for the most part, the 



interstices smooth or nearly so 12 



12 Elytra much depressed, nearly flat. Black, prothorax twice as 

 wide as long [!], slightly convex, [moderately coarsely], sparsely 

 punctate, the sides [distinctly] rounded and confluently rugose, 

 broadly depressed; posterior angles obtuse, not at all rounded; 

 elytra ovate, slightly wider than the prothorax, declivous behind, the 

 surface coarsely punctate and subrugose, without faint costuliform 

 lines, the sides acutely margined; epipleura sparsely, obsoletely 

 punctate. Length 25.0 mm. Camp 7, Mexican Boundary Com- 

 mission. [Pelecyphonts rimatus Lee.] rimatus Lee. 



A Smaller, shining, black, the elytra dark piceo-rufous; head deeply, 

 transversely concave, coarsely, densely punctate, a transverse 

 impunctate area between the eyes; prothorax four-fifths as wide 

 as the elytra, two-fifths wider than long, a little more narrowed 

 apically than basally, the sides evenly, rather strongly rounded; 

 surface moderately coarsely, rather closely but irregularly punc- 

 tate, convex, with a small feeble impression just behind the middle 

 and another oblique near the base at each side near lateral fourth ; 

 margins reflexed, coarsely, transversely rugose, the basal impression 

 distinct; elytra oblong, nearly parallel, with feebly arcuate sides, 

 the apical lobe rather large, abrupt; surface nearly flat, even, 

 except a faint cariniform line near the sides joining the margin 

 near basal fifth, the very coarse punctures everywhere well sep- 

 arated; side margins acute, ending abruptly near apical sixth; 

 under surface shining, the legs moderately long. Length (c?) 21.7 

 mm.; width 10.5 mm. Arizona (locality unrecorded). 



subplanatus n. subsp. 



Elytra very distinctly though moderately convex 13 



13 Pronotum without trace of discal impressions; punctures of the head 

 very coarse and dense. Body large, stout, oblong-elongate, rather 

 convex and shining, piceous-black, the elytra paler, rufo-piceous; 

 head deeply, transversely impressed, the impunctate space between 

 the eyes small and irregular; prothorax (9) nearly four-fifths as 

 wide as the elytra, unusually short, nearly three-fifths wider than 

 long, the deeply sinuate apex much narrower than the base, the 

 sides strongly, evenly rounded; surface evenly, rather strongly 

 convex, very coarsely, deeply, closely and unevenly punctate, the 

 sides deplanate, coarsely, transversely rugose, the basal impression 

 distinct; elytra large, oblong, with subparallel and broadly arcuate 



