320 MEMOIRS ON THE COLEOPTERA 



yellow and squamiform; head as usual in form, clothed throughout 

 very densely with rather long coarse hairs, the erect hairs compara- 

 tively few; antennal club as in the two preceding, the last palpal joint 

 broadly oval, nearly three-fourths as long as the club, with an ex- 

 cavation which is more broadly oval than in any other species, 

 occupying the entire side of the joint, leaving an even ambient rim, 

 which is exactly equal in thickness throughout the periphery, the 

 excavation opaque, the rim rather shining; prothorax relatively 

 smaller than in any other species, barely a third wider than the 

 median length, the sides parallel and crenulate in basal, converging 

 and even in apical, half, the angles very obtuse and rather 

 rounded; apex feebly sinuate, rather more than half the basal width, 

 the basal lobe subtruncate; surface with rather coarse, strong 

 and close-set punctures, the more densely clothed and punctate 

 median impression ending just behind the middle; squamules 

 gradually pointed and elongate, close-set laterally and in the median 

 impression, well separated elsewhere; erect hairs sparse, rather short, 

 only visible along the sides and medially toward tip; scutellum ex- 

 tremely densely squamose, the scales forming a more compact crust 

 than in either of the preceding; elytra fully a third longer than wide 

 and at least two-thirds wider than the prothorax, obtusely rounding 

 in apical third, finely, irregularly and closely punctate and rugulose, 

 the scales very dense and three times as long as wide along the suture, 

 elsewhere close and three to four times as long as wide, in mutual 

 contact at some points, as behind the humeral umbones; pygidium 

 and abdomen with dense and rather smaller and shorter scales; 

 apical tooth of the anterior tibiae very acute, gradually feebly re- 

 flexed; hind tarsi three-fourths as long as the tibiae. Length 21.5 

 mm.; width 10.0 mm. California (Sta. Barbara Co.). One example, 

 probably received from Mr. Harford angusticollis n. sp. 



The species identified above as squamicollis Lee., agrees tolerably 

 well with the original description; in the unique female type the 

 prothorax is said to be covered with small narrow scales like those 

 of the head. The dense covering of moderately long decumbent 

 thick hairs in the male, as noted in my male representatives of 

 squamicollis, are, as a rule, replaced by a much thinner vestiture of 

 still smaller hairs or squamules in the female; so possibly my 

 squamicollis Lee., may not be absolutely conspecific. 



In the type of pistoria, the middle tarsi are in part missing, but 

 I infer that when perfect they are shorter than the tibiae, because 

 of the unusual brevity of the hind tarsi and because the short 

 middle tarsus is a character that seems to be coordinate with the 

 more feebly developed last joint of the maxillary palpi, in which 

 pistoria agrees with riversi and carpenteri. 



At first it seemed probable that the types of crimcollis might 



