350 MEMOIRS ON THE COLEOPTERA 



set, sparse anteriorly toward the middle, each puncture with a scale, 

 small and hair-like laterally, broad and pointed basally, the vittae 

 as in the preceding, except that at the middle of the medial vitta, 

 in the type, there is a point from which the scales radiate; scutellum 

 as in the preceding; elytra two-fifths longer than wide, two-fifths 

 wider than the prothorax, arcuately rounding posteriorly behind the 

 middle, the scattered scales numerous, not quite spreading to the 

 white vittae, lanceolate, three times as long as wide; pygidium as in 

 the preceding, except that the scales are smaller and stouter and the 

 minute hairs still smaller; first tooth of the anterior tibiae very small, 

 almost vestigial. Male not known. Length 31.0 mm.; width 15.4 

 mm. Arizona (Oak Creek Canon), Snow. A single specimen. 



matrona n. sp. 



30 Body rather narrow, subcylindric, feebly shining, pale reddish-brown 

 in color, the vestiture white; head relatively large, rather finely and 

 not at all closely punctate, the clypeus more coarsely than the vertex 

 and both loosely clothed with moderately long stiff decumbent 

 yellowish hair, denser but not in the least squamiform near the eyes; 

 clypeus broad, feebly concave, arcuato-truncate at apex, with 

 distinct but narrowly rounded angles and subparallel sides; antennal 

 club between two and three times as long as the stem; penultimate 

 palpal joint longer than in the western species; prothorax twice as 

 wide as long, broadly and angularly prominent at the sides, rather 

 finely, closely and evenly punctate and subevenly clothed with stiff 

 decumbent yellow hairs, becoming dense and whitish but not at all 

 squamiform along the median line, sometimes denser near lateral 

 fourth behind the middle, but never forming a distinct vitta; erect 

 hairs completely wanting; scutellum closely and uniformly clothed 

 with shorter, whiter and more squamiform hairs; elytra nearly one- 

 half longer than wide, barely visibly wider than the prothorax, 

 rounding in apical third, feebly rugulose, finely, rather closely 

 punctate, the vestiture yellowish, consisting of small fine decumbent 

 and well separated hairs, which become gradually aggregated into a 

 sutural and three discal lines of slightly longer thicker and white 

 hairs of the same kind, these lines rather inconstant, the inner more 

 or less oblique and one or all may become obsolete; pygidium rather 

 small, equilatero-triangular, densely clothed throughout and evenly 

 with short yellowish hairs and many long erect hairs; abdomen with 

 the small slender decumbent hairs denser toward the segmental 

 apices; middle tarsi distinctly 'shorter than the tibiae. Length 

 22.0-22.5 mm.; width 9.5-10.5 mm. Five specimens. 



Female similar to the male in general color, sculpture and ves- 

 titure but a little stouter and more oval, the elytra slightly inflated 

 post-medially; head similarly sculptured but more sparsely clothed, 

 the clypeus shorter and with very broadly rounded angles; antennal 

 club barely more than half as long as the stem; prothorax nearly 

 similar but rather less finely or closely punctate and with the ves- 

 titure a little sparser. and coarser; elytra nearly similar in ornamen- 

 tation, the white vittae rather more constant; pygidium nearly similar; 



