154 MEMOIRS ON THE COLEOPTERA 



basal angles moderately rounded; base arcuate, the bead gradually 

 very feeble medially; punctures extremely fine and sparse, distinct 

 but not coarse near the sides, not closer along the base; elytra fully 

 one-half longer than wide, a little wider than the prothorax, the 

 sides feebly arcuate; apex circularly rounded; punctures small, not 

 very deep, sparse, rather confused basally, elsewhere lineate, except 

 toward the suture; pygidium moderately convex, finely scabriculate, 

 sparsely pubescent basally; hind tarsi not quite as long as the tibiae. 

 Female with the head and prothorax relatively much smaller than 

 in the male, the eyes smaller, the clypeus more coarsely rugose 

 almost throughout ; antennal club small, less than half as long as in the 

 male; elytra a little shorter, finely, remotely punctulate, the punctures 

 not so confused basally, in unimpressed series except suturally, the 

 sutural series regular as usual ; pygidium smoother, more shining, gla- 

 brous; hind tarsi very small, slender, only three-fourths as long as the 

 tibiae. Length (cf 9 ) 9.8-10.5 mm.; width 4.7-5.0 mm. Arizona 

 (Huachuca Mts.), H. W. Wenzel modulata n. sp. 



6 Front densely and strongly rugose behind the clypeal suture; clypeus 

 with the sides not at all reflexed in basal two-thirds, the surface 

 continuing unmodified to the extreme edges, concave and strongly 

 reflexed only at apex. Body subparallel, rather strongly convex 

 and shining, pale brownish-yellow, the head black, the front rufescent 

 and the clypeus rufous, the punctures becoming fine and sparse 

 basally; eyes separated by a little more than twice their widths, 

 the clypeus coarsely and unusually deeply, confluently punctate, 

 of the usual subquadrate form, the strongly upturned apex smooth 

 in the concavity, the median line feebly impressed; antennal club 

 but little longer than the stem, slightly curved; prothorax three- 

 fourths wider than long, the sides broadly rounded and slightly 

 converging anteriorly from the broadly rounded basal angles to the 

 apex, finely, sparsely punctate, more distinctly and less sparsely 

 laterad; basal bead fine, only visible toward the sides; scutellum 

 acutely ogival, finely, sparsely punctate; elytra nearly two-fifths 

 longer than wide, parallel, with feebly arcuate sides, circularly 

 rounded at apex, barely at all wider than the prothorax, the punc- 

 tures fine, sparse and feebly impressed, in series except suturad; 

 abdomen with the punctures of the transverse series notably fine. 

 Length (cf ) 10.8 mm.; width 5.1 mm. Arizona (Tucson), Wick- 

 ham rugulifrons n. sp. 



Front not strongly or densely rugose behind the suture; clypeus concave 

 along the sides 7 



7 Form oval, convex, not very shining, the elytra dullish; color as in 

 the preceding; head ( 9 ) nearly three-fifths as wide as the prothorax, 

 sparsely punctate, finely posteriorly, coarsely but shallowly and 

 discretely anteriad; clypeus one-half wider than long, feebly trape- 

 zoidal, with rounded sides and truncate apex, the surface deeply 

 concave, smooth and alutaceous throughout the external periphery 

 to the extreme base, the medio-basal parts convex, rather coarsely but 

 not deeply, densely punctate and feebly impressed along the middle 

 suture rather fine but unusually deep and strong throughout the 



