Coleopterological Notices, V. 539 



these strise. The lateral line of fine punctures seems to become 

 obsolete in depurator and its allies, and in that group the two or 

 three fine marginal punctures of the pronotum are also obsolete. 

 The meaning of these singular punctures is diflScult to state, unless 

 they be the remains of tactilo-setigerous pores. 



The following species are assigned for convenience to the groups 

 adopted by Dr. Horn : — 



Group Areuatus. 



Margins of the prothorax fimbriate ; anterior tihise dentate. 



H. seminiljer n. sp. — Stout, oblong and convex, resembling seUatus. 

 Head minutely, obsoletely punctulate, tbe frontal stria entire ; mandibles 

 minutely, sparsely punctulate. Prothorax fully twice as wide as long ; sides 

 moderately convergent, broadly, almost evenly arcuate from base to apex ; 

 marginal stria fine but distinct, entire ; outer lateral entire, inflexed at api'x, 

 receding from tbe edge bebind ; inner lateral strong, nearly entire, somewbat 

 uneven, tbe space between tbe two witli one or two sbort strides anteriorly ; 

 disk subimpunctate, witli a sbort deep stria before tbe scutellum. Scutellum 

 equilateral, feebly impressed. Elytra ratber less tban one-balf longer tban 

 the prothorax, and, at basal third, quite distinctly wider ; apex obliquely 

 arcuate, four-fifths as wide as the base ; inflexed flanks coarsely bisulcate ; 

 outer subhumeral stria obsolete behind, but represented by a sbort deep stria 

 near the extremity of the oblique humeral, which is fine ; inner subhumeral 

 feebly indicated by a few subobsolete punctures near the first dorsal ; first 

 three dorsals entire ; fourth represented by a short distinct stria at base and 

 a few subobsolete punctures at apex ; fifth and sutural entirely wanting, 

 sometimes rudimentary near the apex. Prnpi/yidium remotely coarsely and 

 variolately punctate toward tbe sides, subimpunctate toward the middle be- 

 hind ; pygidium sparsely, feebly punctate, the punctures becoming larger and 

 clos r but shallow near the anterior angles. Prosternal lobe finely margined ; 

 posterior process spatuliform, received in the deep median emargination of the 

 m«sosternum. Anterior tibiae strongly bidentate, the apical tooth feebly 

 bilobed ; posterior confusedly spinose externally, remotely so toward base. 

 Length 6.0 mm. ; width 4.5 mm. 



Utah (southwestern). Mr. Weidt. 



Allied closely to sellatas, but differing in the form of the marginal 

 stria of the mesosternura, which in «t;//a^«;sevenly follows the rounded 

 outline of the median emargination ; in the present species it is pos- 

 teriorly and acutely angulate at the emargination ; it also differs in 

 its much sparser and finer pygidial sculpture especially along the 

 anterior margin, and in the presence of a distinct impressed appen- 



