2io MEMOIRS ON THE COLEOPTERA 



on the elytra, the minute reticulation of the head much stronger; head 

 as long as wide, fully as wide as the prothorax or apparently a little wider, 

 evidently gradually inflated basally, the eyes small, convex and anterior; 

 front broadly concave medially except behind the middle; antennae 

 blackish, nearly as in laticeps, except that the second joint is not quite 

 so long as the third and fourth combined, the third much longer than 

 wide, evenly obconic, the fourth transverse, tenth nearly twice as wide 

 as long; prothorax but just visibly wider than long, only very feebly 

 narrowed from apex to base, the sides evenly and very sensibly arcuate, 

 the median line finely and deeply impressed throughout; elytra fully 

 as long as wide, with distinctly diverging sides, at base distinctly wider, 

 the suture a fourth longer, than the prothorax; abdomen as in fracta. 

 Length (extended) 1.2 mm.; width 0.19 mm. Nevada (Reno). 



Resembles fracta though slightly less slender and evidently 

 larger in size, the prothorax still less transverse and the elytra 

 larger and less parallel. From subtilior Bernh., it differs in the much 

 larger concavity of the front, coarser impressed median line of the 

 pronotum, less elongate and more strongly sculptured head and 

 other characters. As usual, the anterior margin of the prothorax 

 is arcuate and, here, is rather prominent medially, the short trans- 

 verse fossa at the base of the head being deep and clear-cut to 

 receive it. 



Thecturota histrio n. sp. Slender, subparallel, feebly convex, rather 

 shining, dark rufo-piceous, the elytra paler and more yellowish, the 

 head and abdomen black, the legs pale; pubescence short; punctures fine 

 and close-set, a little larger but very shallow on the head, which is rather 

 longer than wide, very feebly and gradually inflated basally and sensibly 

 narrower than the prothorax, the eyes only feebly prominent and at a 

 little less than twice their length from the base, the front with a small 

 deep punctiform fovea just before the centre, the transverse basal im- 

 pression fully half as long as the entire width; antennae dark piceous- 

 brown, of the usual form, the basal joint not quite so long as the next 

 two and much thicker, the tenth not more than one-half wider than long, 

 the last elongate-oval, as long as the two preceding; prothorax nearly a 

 third wider than long, the sides distinctly converging and broadly, sub- 

 evenly, moderately arcuate from apex to the very obtuse and rounded 

 basal angles, the median line sharply, rather finely, deeply and equally 

 impressed throughout; elytra nearly as long as wide, subparallel, about 

 a fifth wider, the suture a fourth longer, than the prothorax; abdomen 

 at base narrower than the elytra, the sides straight and very feebly di- 

 verging to the tip, which is almost as wide as the elytra. Length 1.25 

 mm.; width 0.2 mm. Virginia (Fort Monroe). 



Readily distinguishable from the Catskill demissa, the only com- 

 parable species, by its larger size, smaller and less prominent eyes, 



