156 MEMOIRS ON THE COLEOPTERA 



marginal bead finer than usual; apex almost transverse, the angles 

 acute, somewhat anteriorly prominent; surface closely and rather 

 strongly punctate laterally, more finely and loosely medially, the 

 basal lobe strong and rather abruptly formed, the strides wanting; 

 scutellum smaller and much less transverse than usual; elytra fully 

 four-fifths longer than wide, nearly four times as long as the pro- 

 thorax and, near basal third where the sides are somewhat promi- 

 nently rounded, about a fourth wider than the latter, thence peculi- 

 arly attenuate posteriorly to the apex, which is narrower than in any 

 other species, the sides arcuate; surface minutely, not very closely, 

 confusedly punctate throughout; abdomen finely, rather closely 

 punctate, the metasternum but little less finely though deeply. 

 Length 3.0 mm.; width 1.35 mm. California (Siskiyou Co.). A 

 single example taken by Albert Koebele picea Lee. 



The species described by LeConte under the name Dacne picea is 

 very aberrant, not only in sculpture but in its peculiarly long atten- 

 uate elytra and relatively small transverse prothorax; it deserves a 

 more distinguishing name than that given it by the author. I am 

 somewhat puzzled on viewing the considerable series of californica 

 in my collection. Typically, it would appear to have a piceous- 

 brown color, clearer toward the humeri, a broad, short, parallel 

 prothorax and comparatively short elytra, but fcy far the greater 

 number of examples have black elytra, with a red humeral spot as in 

 ^-maculata, though smaller and without the apical red cloud of that 

 species. It may always be distinguished easily from \-maculata, 

 however, by the very much shorter and ferruginous, not deep black, 

 prothorax, and, from elongata, though almost similarly colored and 

 sculptured, it may be known by its more abbreviated form and 

 smaller size. In 4-maculata the prothorax is more extended longi- 

 tudinally than in any other species. The abbreviated outline and 

 inflated prothorax of the two mutually similar examples of laticollis 

 at hand, give this species a peculiar habitus. In fact all the species 

 above enumerated seem to be well differentiated among themselves. 



Pseudischyrus n. gen. 



The type of this genus is Ischyrus nigrans Cr., which is however 

 synonymous with Tritoma brunnea Lac. (Mon. Erot., p. 222). The 

 body is shorter and more oval than in Ischyrus, more nearly as in 

 Tritoma, with the black forms of which it will doubtless be found 

 commingled in many collections, but the eyes are very coarsely 

 faceted as in Ischyrus 4-punctatus Ol'iv., which may be regarded as 



