48 MEMOIRS ON THE COLEOPTERA 



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three times their widths; abdomen shining, faintly micro-reticulate, 

 finely, sparsely punctate, not more coarsely so near the sides, the 

 last segment (cf) with a small apical spot which is slightly impressed, 

 densely punctate and clothed with coarse but not notably long 

 whitish hairs, less erect and shorter than in the preceding forms. 

 Length 2.0 mm.; width 1.2 mm. New York. [Limnichus obscurus 

 Lee., Proc. Acad. Phila., 1854, p. 116] obscurus Lee. 



5 Surface lustre alutaceous, more shining and subameous anteriorly. 

 Form nearly as in the preceding, very evenly oval, convex, gradually 

 rather pointed behind, the sides continuously arcuate throughout, 

 black, the very short sparse and decumbent vestiture easily shed; 

 head with the usual dense, anastomosing, longitudinally pliciform 

 sculpture, with small included punctures: prothorax rather less than 

 three times as wide as the minimum length, finely, sparsely punc- 

 tured, the fine micro-reticulation feeble, strong laterally, where the 

 punctures are feebler as usual, the median line impressed and strii- 

 form in basal half; elytra alutaceous, the micro-reticulation larger 

 and more polygonal than on the pronotum though feeble, the punc- 

 tures fine, sparse and very feeble, annuliform, shallower than those 

 of the pronotum; abdomen more shining, very minutely, sparsely 

 punctulate, not more coarsely laterally, the last segment more 

 strongly laterally and apically, the pubescent spot (c/ 1 ) subapical, 

 feebly defined and closely punctate but with short inconspicuous 

 hairs. Length 1.8-2.0 mm.; width 1.15-1.2 mm. Colorado (Buena 

 Vista, 8000 feet elevation Wickham; Veta Pass, LeConte). 

 [Limnichus montanus Lee., Bull. U. S.. Geol. Surv., 1879, p. 515]. 



montanus Lee. 



Surface lustre strongly shining throughout, the sparse decumbent pale 

 vestiture more persistent, coarse as usual but very short 6 



6 Form rather broadly oval, rounded at the sides, gradually rather 

 acute behind, black, polished, the micro-reticulation of the upper 

 surface everywere fine and subobsolete, evident though not strong 

 toward the sides of the pronotum; plicate sculpture of the head 

 distinct; prothorax barely two and one-half times as wide as long, 

 the strongly converging sides straight, the apical angles much pro- 

 duced and acute as usual; median line finely striiform from the 

 middle nearly to the base, not concave, the transverse line of opacity 

 wholly wanting, the punctures minute and sparse; scutellum as 

 usual, elongate-ogival; elytra about a fourth longer than wide, almost 

 evenly rounded at the sides, gradually acuminate, minutely, sparsely 

 and very inconspicuously punctulate; abdomen shining, much less 

 finely though loosely, more deeply punctate, the last segment more 

 coarsely and (cf ) with a small, indefinite, more closely punctured 

 patch near the apex, clothed rather inconspicuously with slightly 

 longer hairs, the tip with a shallow transverse emargination as usual. 

 Length 1.5-1.8 mm.; width 0.75-1.0 mm. Mississippi (Virksburg) 

 to New Mexico (Albuquerque). [Limnichus (Eulimnichus) per- 

 politus Csy., Ann. N. Y. Acad., 1800, p. 151]. .. .perpolitus Csy. 



Form more narrowly oval and smaller in size, similar in general outline, 

 sculpture and vestiture, black, similarly convex, rounded at the 



