THYCE AND POLYPHYLLA 315 



20.0-20.5 mm. ; width 9.8-10.0 mm. California (Los Angeles Co.). 



Two examples aperta n. subsp. 



'10 Body slender, cylindric, feebly shining through the close vestiture, 

 which is pale yellowish in color; head much shorter and more trans- 

 verse than in any of the four preceding, the deeply concave clypeus 

 with longer, less coarse, extremely dense and more silky vestiture, 

 the covering of the vertex nearly similar; last palpal joint almost as 

 in fossiger but not quite so long, the narrow and very deep excavation 

 tending more to closure by the overhanging walls of the excavation 

 a variable character however, the outer surface coarsely rugose; 

 prothorax as in fossiger throughout but with more broadly rounded 

 basal angles; elytra narrower, fully two-fifths longer than wide and 

 barely a third wider than the prothorax, otherwise nearly as in 

 fossiger, except that the punctulation is a little finer and the dense 

 vestiture more yellowish and a little longer; pygidium narrower and 

 more convex, with the dense vestiture perceptibly longer, scarcely 

 wider than long; abdomen, tibiae and tarsi nearly as in fossiger. 

 Length 18.5 mm.; width 8.6 mm. California (Los Angeles Co.). A 



single male example angustula n. sp. 



Body long and subcylindric but much larger than in angustula, the dense 

 vestiture finer and shorter, whitish in color; integuments piceous- 

 brown, the hind femora blackish; head with dense coarse decumbent 

 vestiture and the usual long erect hairs, the vertex feebly elevated 

 medially; clypeus very deeply concave, with very obtuse or nearly 

 rounded angles, the punctures rather separated, the vestiture of 

 long, apically very slender and basally stouter hairs, rather sparse; 

 last palpal joint rather stout, fully three-fourths as long as the an- 

 tennal club, the very deep entire fossa broad basally, narrow at apex; 

 prothorax of the usual form but with the lateral angle at the middle 

 almost obliterated and broadly rounded, the sides serrato-crenulate 

 in about basal half, the basal angles obtuse and scarcely at all 

 rounded; base more angulate than usual; surface strongly convex, 

 in sculpture and vestiture nearly as in fossiger but with all the hairs, 

 decumbent and erect, rather shorter, the relative size much larger; 

 scutellum nearly similar, densely albido-pubescent, the hairs not quite 

 so squamiform as in fossiger; elytra more elongate but otherwise 

 similar, except that the dense whitish vestiture is a little finer and 

 shorter, so that the obscure red-brown ground color is more visible, 

 two-fifths longer than wide; pygidium similar but relatively some- 

 what larger; abdomen, tibiae and tarsi nearly as infossiger. Length 

 21.0-21.5 mm.; width 9.8-10.0 mm. Three examples. 



Female differing altogether from the female of blaisdelli and fossiger, 

 elongate, cylindric in form, nearly as in the male; head and clypeus 

 finely, densely punctate and sparsely clothed with very small slender 

 hairs, the median tumor of the vertex distinct; antennal club small, 

 moderately stout; last palpal joint slender, much narrower than the 

 preceding joints, three-fifths as long as the club, gradually sharply 

 pointed, with a very narrow deep excavation extending from the 

 base beyond apical third; prothorax throughout as in the female of 

 blaisdelli but much larger, the erect hairs shorter and less conspicu- 



