336 MEMOIRS ON THE COLEOPTERA 



eyes large and distinct; clypeus much shorter, with sparse ves- 

 titure throughout, the apex more abruptly reflexed, the angles 

 right, not rounded, the sides parallel thence for a short distance, 

 then widely diverging and arcuate to the base; apex broadly and 

 feebly arcuate medially; antennae fuscous, the club less than half 

 as long as the stem; last palpal joint similar to that of the male 

 but a little smaller; prothorax subsimilar but narrower and rela- 

 tively smaller, less than twice as wide as long, the punctures 

 notably coarser, deeper and rather more separated, the vittae 

 nearly similar but narrower and not so compact, the erect hairs 

 rather shorter, except apically, less numerous and not so con- 

 spicuous; side margins more strongly crenulate; scutellum densely 

 though more narrowly squamose along the middle; elytra more 

 oval, a third longer than wide and almost one-half wider than the 

 prothorax; sculpture and vestiture nearly as in the male, except 

 that the compact white lines are narrower; pygidium similar in 

 form and size, equilatero-triangular, very densely squamulose, 

 more sparsely gradually toward the sides and apex, without the 

 evident sparser median line of the male; tarsi still shorter and more 

 slender. Length 27.0 mm.; width 13.0 mm. One specimen. 



California (the male and female apparently from the same source 

 but from an unrecorded part of the state). . .relicta n. subsp. 

 B Male similar to incolumis but broader in outline and black through- 

 out, the pronotum narrowly rufous at the sides, the pygidium 

 dark ferruginous; legs dark rufous, the femora more obscure; 

 vertex and clypeus, except the densely squamulose apex of the 

 latter, with close erect and conspicuous hair, the clypeus parallel, 

 arcuato-truncate, with obtuse angles; palpi and antennae nearly 

 as in the preceding; prothorax similar, the long erect hairs nu- 

 merous and conspicuous throughout; elytra only about a fourth 

 longer than wide, two-fifths wider than the prothorax, throughout 

 as in incolumis, except that the decumbent yellowish hairs are 

 still smaller, very slender and more close-set; pygidium much 

 larger, transversely triangular, the close mixture of small slender 

 scales and short hairs still finer and without trace of a glabrous 

 or even of a sparser median line; middle tarsi long, fully as long 

 as the tibiae. Length 24.5 mm.; width 12.8 mm. California 



(Los Angeles Co.). One specimen robustula n. subsp. 



1 6 Elytra with lines of dense white scales, which are sharply differ- 

 entiated from the more slender scattered scales of the intervals. 

 Sonoran and Pacific in range and southward to Central America. . 17 

 Elytra with less sharply defined and more inconstant lines of dense white 

 scales, which blend more gradually into the finer and sparser ves- 

 titure of the intervals; females abundant. Atlantic coast 30 



Elytra with small and very irregular blotches of dense squamules, which 

 sometimes exhibit a tendency to lineal arrangement on parts of 



the surface; females very rare. Atlantic coast regions 31 



17 Antennal club relatively small, somewhat as in the diffracta and 

 incolumis sections, the dense elytral lines of white scales more or less 

 ragged or irregularly broken; females apparently very rare 18 



