f 



102 MEMOIRS ON THE COLEOPTERA. 



sinuate medially, with rather obtuse angles; first four joints of the hind tarsi 

 equal. Length 2.4 mm.; width 0.66 mm. Queen Charlotte Islands. 



This species, like the last, taken by Mr. J. H. Keen has the sterna 

 somewhat similar, but the acute mesosternum, extending quite to 

 apical third of the coxae, is fully twice as far removed from the much 

 shorter and more broadly angulate metasternum; the antennas and 

 sculpture also are notably different. 



Dimetrota vacunalis n. sp.- Moderately stout, evidently convex, rather 

 shining though feebly micro-reticulate throughout, the punctures very fine, 

 rather close, sparser on the more shining abdomen, the palish pubescence 

 rather coarse; color black, the elytra dark red-brown, black suturally toward 

 base, the legs rufo-piceous, paler distally; head convex, slightly transverse, 

 the eyes well developed, at barely their own length from the base, the tempera 

 not quite so prominent, at first parallel, then broadly oblique to the base, 

 which is three-fourths as wide as the head, the carinae rather pliciform than 

 carinate, not quite entire; antennae blackish throughout, moderately short, 

 somewhat strongly incrassate, the cylindrical basal joint not thicker than 

 the second, the latter about as long as the third, the outer joints evidently 

 transverse, the last rather longer than the two preceding; prothorax smaller 

 and less transverse than u ual, much wider than the head and distinctly 

 narrower than the elytra, the sides parallel and very evenly arcuate, the im- 

 pression obsolete; elytra distinctly shorter than wide, the suture a third 

 longer than the prothorax, the apices externally distinctly sinuate; abdomen 

 rather short, distinctly narrower than the elytra, gradually and very feebly 

 narrowed from base to apex, the fifth tergite not quite so long as the others; 

 tarsi as usual, slender. Length 2.4 mm.; width 0.63 mm. California. 



In this distinct species, which is apparently represented by the 

 female, the mesosternal process extends slightly behind the middle 

 of the coxae and is unusually obtuse at tip, by no means acute or 

 aciculate. 



Dimetrota sectator n. sp. Rather stout and but slightly convex, slightly 

 shining, the punctures very dense and strongly asperate though fine through- 

 out, sparser on the more shining abdomen; color black or piceous-black 

 throughout, the elytra but little paler, the legs piceous, paler distally; head 

 rather large and transverse, the eyes large, moderately convex, at scarcely more 

 than half their own length from the base, the carinae entire; antennae blackish 

 throughout, somewhat short, moderately incrassate, the second jo'nt but 

 little longer than the third, the outer joints distinctly transverse, the last grad- 

 ually pointed and much longer than the two preceding; prothorax rather 

 broad and transverse, distinctly wider than the head and very nearly as wide 

 as the elytral base, the sides broadly rounded, feebly basally, more strongly 

 and evidently converging anteriorly, the median line feebly, not finely im- 

 pressed almost to the apex; elytra rather strongly transverse, the suture 

 much longer than the prothorax, the apices not sinuate laterally; abdomen 



