TENEBRIONID.E 135 



behind the middle; elytra fully three-fourths longer than wide, nearly 

 one-half wider than the prothorax, gradually broadening and widest 

 at apical two-fifths, the apex more abruptly, obtusely lobiform from 

 above; surface similarly even, feebly creased, with small, very feebly 

 impressed, rather indefinite and still more remote punctures, the 

 acute lateral margin extending slightly behind the middle; abdomen 

 as in proximus; legs moderate, the tarsi rather more slender than 

 usual. Length (9 ) 24.0-26.0 mm.; width 11.4-12.0 mm. Arizona 

 (Nogales) rusticus n. sp. 



6 Elytral punctures extremely minute and sparse, obsolescent and 

 even smaller than the pronotal punctures. Body oblong, rather 

 convex, alutaceous, deep black throughout; head transversely 

 impressed, coarsely, deeply and closely punctate; antennae rather 

 slender but increasing rapidly in width and strongly compressed 

 distally (9), stouter and less incrassate distally (cf); prothorax 

 about two-fifths wider than long, the sides rounded and parallel, 

 the general form as usual, the surface broadly convex, very finely, 

 sparsely punctate, moderately reflexed and coarsely, transversely 

 rugose at the sides, the basal impression small and feeble; elytra 

 about two-fifths wider than the prothorax in both sexes, there being 

 very little sexual difference in the body throughout, a very little 

 shorter in the male, two-thirds to three-fourths longer than wide, 

 broadly, evenly convex, sometimes with the sutural regions impressed 

 posteriorly, without trace of costae or rugae but with fine irregular 

 creases, the acute lateral margin extending to apical fourth, nar- 

 rowly but strongly reflexed ; abdomen with minute, remote punctures, 

 becoming coarser and closer posteriorly; legs and tarsi rather long 

 and slender, a little longer in the male. Length (cf, 9) 22.0-25.0 

 mm.; width 10.6-11.7 mm. Arizona (San Bernardino Ranch, 

 Cochise Co.), F. H. Snow sponsor n. sp. 



Elytral punctures not coarse but always very distinct, never minute and 

 always much larger than the pronotal punctures 7 



7 Side margins of the pronotum deplanate, not reflexed, coarsely and 

 sparsely punctate, only the extreme edges confluently punctate, 

 becoming rugulose posteriorly. Form elongate, very moderately 

 convex, alutaceous, black throughout, the elytra dark piceous; 

 head not coarsely but strongly, sparsely punctate, with unusually 

 long blackish setae, the punctures wanting in a large median area 

 between the eyes; antennae well developed, rather stout; prothorax 

 two-fifths wider than long, parallel, the sides broadly arcuate; 

 surface broadly, evenly and rather strongly convex, minutely, 

 sparsely punctate, the side margins relatively rather narrow; basal 

 impression well developed; elytra two-fifths wider than the prothorax, 

 fully three-fourths longer than wide, widest at apical two-fifths, the 

 sides thence feebly converging and but feebly arcuate to the base, 

 rapidly rounding behind, the apical lobe feebly differentiated; surface 

 slightly convex, having stronger sparse punctures intermingled with 

 numerous smaller and irregular ones, also with three extremely ves- 

 tigial and indefinite costuliform lines on each, the side margin extend- 



