TENEBRIONID^E 179 



abdomen not finely, transversely strigose. The elytra have, sim- 

 ilarly, each a tumidity at base opposite the projections of the pro- 

 thorax, but, in villosa, the outer angle of the anterior tibiae is said 

 to be blunt; in duplex it is very finely aciculate and spiniform. The 

 figure given on the plate indicates that the elytra in villosa are shorter, 

 being but little longer than wide and that the erect hairs are longer 

 as well as denser than in duplex; no mention is made by Mr. Champion 

 of any other elytral vestiture than the erect hairs, while in duplex 

 the short subrecumbent hairs are rather the more numerous. 



Group IV- -Type impetrata Horn. 



This group includes at present three species. They are rather 

 small in size, convex and black or brown in color, the ridges of the 

 elytra rather obtuse and evidently a more advanced development 

 of the unduliform lines observable in the three preceding groups; 

 they differ from the hirsuta, villosa and horrida groups in the sparser, 

 short and spinuliform black hairs of the tarsal soles, and the anterior 

 tibiae are much more gradually prominent and acute externally 

 at apex; in the tarsi and mentum they do not differ materially from 

 the second group of the genus. 



Body piceous or dark brown in color. Form oblong, the lustre dull; 

 head coarsely, not closely punctate, the occiput and neck densely so; 

 prothorax at least one-half wider than long, widest slightly behind 

 the middle; base not wider than the apex, the latter sinuate, with 

 the angles anteriorly prominent, the sides regularly arcuate, the 

 hind angles rectangular; surface feebly convex, with the lateral 

 margin slightly explanate and slightly reflexed, moderately coarsely, 

 evenly but not densely punctate, along the lateral margin very 

 coarsely punctate, the punctures throughout with extremely short 

 yellow hairs, the lateral edge similarly fimbriate; elytra oblong, 

 twice as long as wide, at base narrower than the prothorax, the 

 humeri very obliquely rounded; marginal ridge nearly attaining the 

 apex; surface very finely and closely punctate, moderately convex 

 and with three costa?, the lateral, beginning at the margin behind 

 the humerus, extending nearly to the apex and sinuous near its 

 end, the second, not quite reaching the base, slightly oblique to 

 the suture and indistinctly joining the outer costa near the apex, 

 the inner faint, joining the second at a fourth from the apex, these 

 costae and the lateral margin fimbriate at their summits with ex- 

 tremely short hairs; sterna coarsely, not closely punctate; abdomen 

 rather closely and finely, submuricately punctate and with short 

 yellow hairs; legs roughly punctate and slightly hairy. Length 

 10.5-14.0 mm. California (San Diego). [Asida impetrata Horn]. 



impetrata Horn. 



