174 MEMOIRS ON THE COLEOPTERA 



Tachyusa meraca n. pp. Rather slender, only moderately convex, 

 slightly shining, the punctures fine but rather asperate and close, minute 

 and sparser on the more shining abdomen, where the punctures of the 

 impressions are coarse and crowded but not producing well denned 

 secondary carinse; pubescence rather close; color black or nearly so, 

 the elytra but little paler, the abdomen feebly paler basally, the legs 

 pale brown; head distinctly wider than long, almost as wide as the pro- 

 thorax, the eyes rather small, at much more than their own length from 

 the base, the slightly less prominent tempora broadly rounding at base, 

 becoming subparallel behind the eyes; antennae notably small, slender, 

 only feebly incrassate, piceous, slightly paler basally, the first two joints 

 subequal in length, the third but little shorter, fourth more, the fifth 

 less, than one-half longer than wide, the outer joints about a fourth wider 

 than long, the last slightly longer than the two preceding; prothorax 

 rather large, distinctly wider than long, slightly widest at apical fourth, 

 where the sides rapidly round to the apex, feebly convergent and straight 

 thence to the base, the basal angles very sharp and minutely subeverted, 

 the surface unimpressed, excepting a small feeble transverse and sub- 

 duplex ante-scutellar impression; elytra two-fifths wider and a third 

 longer than the prothorax, slightly transverse, the sides only slightly 

 converging posteriorly; abdomen gradually narrowed and with straight 

 sides basally, enlarged apically, the fifth tergite shorter than the fourth. 

 Length 2.6 mm.; width 0.46 mm. Massachusetts. 



The only species with which this can be compared is americana, 

 and it differs in its larger and broader head, with rather more prom- 

 inent eyes, in the much smaller antennae, with shorter outer joints, 

 in having the broader and larger prothorax widest much nearer 

 the apex and with more pronounced basal angles, in its paler legs 

 and broader and more gradually inflated abdomen. 



Tachyusa ohioana n. sp. Small, slender, convex, alutaceous, the 

 abdomen more shining; punctures fine and very close-set, less so but 

 more strongly asperate on the elytra, numerous on the abdomen, where 

 the coarser punctures of the impressions are moderate, the medial carina 

 very fine; pubescence rather long and distinct on the elytra and abdomen, 

 shorter and denser anteriorly; color dark castaneous, the head blackish, 

 the elytra slightly pale, especially at apex, the abdomen testaceous, 

 black posteriorly, the legs very pale flavate; head nearly as long as wide, 

 subquadrate, sensibly narrower than the prothorax, the eyes not prom- 

 inent, at rather more than their own length from the base, the tempora 

 almost continuing their curvature, broadly rounding and converging 

 to the base; antennae only moderate in length, very slender, distinctly 

 incrassate only near the tip, piceous, paler basally, the second joint 

 much longer than the third, fourth a little more, the fifth slightly wider 

 and a little less, than one-half longer than wide, the tenth about as long 

 as wide, the last slender, subparallel, about as long as the two preceding; 

 prothorax (9 ) well developed, only very little wider than long, perfectly 



