THYCE AND POLYPHYLLA 335 



out almost exactly as in mystica, the body very much smaller; head 

 similar, but with the sides of the clypeus much more parallel; last 

 palpal joint smaller, irregularly oval, scarcely more than twice as 

 long as wide, the outer side not flattened though similarly minutely 

 chagrined; erect hairs of the vertex dense, very long and conspicuous; 

 prothorax much shorter, more than twice as wide as long, bright 

 ferruginous in color, sometimes becoming broadly black medially, 

 obtusely angulate at the sides, the latter moderately converging 

 thence basally, more strongly apically, the edge rather strongly 

 crenulate basally; punctures rather coarse, close-set, the fine hairs 

 small, closer and more decumbent antero-laterally, elsewhere 

 suberect and shorter, to erect and longer, very numerous, giving a 

 notably shaggy effect throughout, the medial dense vitta narrow, 

 the oblique sublateral represented only by basal hall and a small 

 spot at the apex; scutellum with dense slender scales along the 

 middle; elytra rather short, a third longer than wide, a fourth wider 

 than the prothorax, the surface rather shining, only very feebly 

 rugulose and finely, sparsely punctate, the decumbent yellowish 

 hairs not at all squamiform as in the three preceding, but fine and 

 in the form of rather stout and gradually attenuated hairs, the dense 

 suture and vittas composed of pure white moderate scales; pygidium 

 wider than long, slightly convex, triangular as usual, the apex only 

 moderately reflexed, the vestiture rather dense and uniform, of 

 very fine scales and short fine hairs, all slightly yellowish, a median 

 line from the base, gradually narrowing to beyond the middle, 

 completely glabrous; middle tarsi about as long as the tibiae. Length 

 23.0-24.5 mm.; width 10.9-11.7 mm. California (Alameda Co.). 

 Four examples as described and a fifth that can not be distinguished 

 otherwise but without trace of the glabrous subembossed pygidial 



line of the other four incolumis n. sp. 



A Male similar to incolumis but of more elongate form and darker 

 coloration, black, the pronotum rufescent laterally, the pygidium 

 obscure rufous; legs dark ferruginous throughout; head and an- 

 tennae nearly similar, the last palpal joint also similar but with 

 the outer chagrined area better defined and somewhat flattened; 

 prothorax similar, but with the erect hairs shorter and less nu- 

 merous except anteriorly; scutellum with a triangular basal area 

 densely squamose; elytra one-half longer than wide, a third wider 

 than the prothorax, the sculpture and vestiture nearly similar; 

 pygidium with a close-set mixture of small slender scales and short 

 hairs, sparser medially toward base, but without trace of a 

 polished glabrous line; middle tarsi not so long, distinctly shorter 

 than the tibiae, the hind tarsi rather longer. Length 26.5 mm.; 

 width 11.7 mm. One specimen. 



Female stouter, more ventricose and more sparsely clothed than 

 the male, rufo-piceous almost throughout, the abdomen black, 

 the legs dark ferruginous; vertex with strong deep and very close- 

 set punctures, those of the clypeus a little smaller and shallower 

 but similarly close; erect hairs long but less conspicuous than in 

 the male and entirely confined to the vertex, the scales near the 



