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15 Form oblong-suboval, very shining, pale flavo-testaceous, the head 

 dark rufous, with barely visible metallic lustre, the pronotum with 

 a very large blackish area having a similar lustre and extending 

 through more than median half at apex, broad at base, with its sides 

 bisinuate and with a broad basal anteriorly emarginate pale area 

 medially at base, the sublateral dark dot feeble, the elytra pale, 

 black at the sides basally and again apically and with the suture also 

 narrowly black; head rather coarsely, deeply and densely punctato- 

 rugose, the punctures smaller/ and separated on the occiput; clypeus 

 much more than twice as wide as long, the edges moderately and 

 not broadly reflexed, the sides broadly rounded from the apex to 

 the base, where alone they become parallel; eyes separated by rather 

 more than three times their width; antennal club not quite as long 

 as the stem; prothorax distinctly less than twice as wide as long, the 

 sides almost evenly arcuate and feebly converging from the broadly 

 rounded basal angles to the sharply marked right apical angles; 

 basal lobe rather broad and feeble; punctures small but deep and 

 sparse throughout, not coarser but finer laterad; surface convexly 

 sloping to the basal bead laterally but not medially, where the inter- 

 ruption is narrow; scutellum finely but more closely punctate 

 basally; elytra a fourth longer than wide, circularly rounded behind 

 the middle, barely at all inflated, a little wider than the prothorax, 

 the punctures rather coarse, deep and conspicuous, close-set in rather 

 even and widely spaced rows, the narrower interspaces feebly convex, 

 the second interval broad, confusedly punctate along the middle, the 

 fourth and sixth each with a widely spaced irregular single series of 

 smaller punctures; series even on the flanks; pygidium convex, the 

 arcuate scratches coarse, rather strong and somewhat anastomosing; 

 inner claw of the anterior male tarsi rather slender, cleft at tip, the 

 upper ramus very thin and much shorter than the lower. Length 

 (cf ) 9.8 mm.; width 5.1 mm. Arizona arida n. sp. 



Form more elongate-oval, convex, shining, the coloration nearly as in 

 arida, except that the large thoracic dark area is broadly detached 

 from the base in the type and still more contracted in other examples, 

 and the external margin only narrowly and feebly brownish, the 

 humeral callus generally deep black; head larger, very differently 

 sculptured, not in dense confused deep punctures as in the pre- 

 ceding, but in a coarse shallow irregular reticulation, replaced pos- 

 teriorly by small sparse punctures, the clypeus not so transverse 

 and more trapezoidal, the sides straight and distinctly diverging 

 basally, the angles not so broadly rounded; edges similarly reflexed 

 throughout; antennal club rather thin, distinctly shorter than the 

 stem; eyes larger and more prominent, separated by less than two 

 and one-half times their width; prothorax as in arida but more nearly 

 twice as wide as long, not so shining, with the punctures very much 

 finer and feebler, very sparse and the surface sloping less strongly 

 or rapidly to the basal bead, the latter more broadly interrupted 

 medially; scutellum similar but with a much broader impunctate 

 margin; elytra very much more elongate, fully two-fifths longer 

 than wide, more rapidly rounding behind in about apical third, 



