THYCE AND POLYPHYLLA 347 



A Female differing from the female of nificollis in being slightly more 

 elongate and convex, uniformly castaneous in color throughout, 

 the pale vittae slightly yellowish perhaps accidentally; clypeus 

 similar but with the parallel sides straight and not arcuate and the 

 surface clothed much more sparsely with very much smaller and 

 more slender yellow squamules; antennae dark brown, the club 

 only half as long as the stem; prothorax similar in general outline 

 but narrower, scarcely twice as wide as long, the rather coarser 

 punctures much deeper, the squamules narrower, becoming very 

 fine laterally, the vittae similar but narrower; scutellum similar; 

 elytra rather more cylindric, feebly inflated behind the middle, 

 more rapidly rounding and obtuse at apex, relatively still much 

 wider than the prothorax, the dense lines narrower, the squamules 

 of the intervals very much finer and more hair-like; pygidium nearly 

 similar but not quite so densely squamulose; at the centre, in the 

 type, there is a point from which the squamules radiate; hind tarsi 

 three-fourths as long as the tibiae. Male unknown. Length 31.0 

 mm.; width 14.3 mm. California (withouc further record, but 

 probably southern) castanea n. subsp. 



B Male oblong, piceous-black, the prothorax, clypeus and legs pale 

 rufo-ferruginous, the antennae more yellowish; sparse vestiture 

 yellow, the dense lines white; head and clypeus strongly and 

 closely punctate; vertex with moderate erect hairs and lateral 

 dense white scales; clypeus large, the apex broadly, evenly arcuate 

 viewed dorsally, very faintly bisinuate viewed postero-obliquely, 

 the angles rounded; sides feebly converging basally, more con- 

 stricted near the base; surface moderately concave, without trace 

 of hairs, having long and finely attenuate abundant scales, be- 

 coming very small and dense apically; antennal club four times as 

 long as the stem; prothorax slightly more than twice as wide as 

 long, the sides broadly and feebly prominent submedially, almost 

 evenly and feebly arcuate and gradually converging from base to 

 apex from a dorsal viewpoint; surface without trace of erect 

 hairs at any point, the punctures coarse, uneven and notably 

 sparse throughout, each with a fine hair-like scale, the vittae 

 distinct, the sublateral broadly interrupted before the middle; 

 scutellum broadly and densely squamose and with scattered scales 

 thence to the sides; elytra rounding behind in less than apical 

 third, a fourth wider than the prothorax, the scattered squamules 

 fine and hair-like, abundant, not quite reaching the solid white 

 lines; pygidium with very small dense yellowish squamules, sparser 

 apically and with a narrow glabrous line from basal to apical 

 fourth; middle tarsi a little shorter than the tibiae, equal to the 

 posterior in actual length. Length 29.0 mm.; width 13.2 mm. 

 One example. 



Female slightly more oval than the male, similar in coloration, 

 the clypeus shorter, nearly three times as wide as long, the apex 

 arcuato-truncate viewed dorsally, feebly bisinuate viewed ob- 

 liquely from the rear, the sides parallel and feebly arcuate, the 

 surface flatter, reflexed abruptly at apex, clothed similarly closely 



