78 MEMOIRS ON THE COLEOPTERA. 



widest well before the middle, not impressed; elytra almost as long as wide, 

 much longer as well as wider than the prothorax; abdomen parallel, slightly 

 narrower than the elytra, the sixth ventral plate (c?) gradually narrowing, 

 with nearly straight sides, to the narrow and truncate apex, the angles blunt; 

 mesosternal process very short, broadly angulate, the apex not at all pro- 

 longed and rather blunt; basal joint of the hind tarsi evidently shorter than 

 two to four, which are equal. Length 2.65 mm.; width 0.58 mm. Iowa 

 (Keokuk). 



Very distinct from any other species in its small prothorax, pe- 

 culiar head and male sexual characters. 



Metaxya invenusta n. sp. Moderately stout and convex, rather shining, 

 the reticulation feeble, the punctures fine, asperulate but not close-set and 

 very inconspicuous; color dark piceous, the head and abdomen black, the 

 legs piceous; head moderately transverse, the eyes at rather more than 

 their own length from the base, the tempera behind them at first parallel, 

 then broadly rounding to the base, the carinse feeble, far from entire; an- 

 tennae moderately long, rather slender, very feebly incrassate, black through- 

 out, the outer joints nearly as long as wide, the second and third elongate, 

 the former the longer as usual; prothorax very moderately transverse, dis- 

 tinctly wider than the head and very evidently narrower than the elytra, 

 the sides parallel .and evenly, moderately arcuate, widest at the middle, 

 scarcely at all impressed; elytra moderately transverse, much longer than 

 the prothorax; abdomen narrower than the elytra, perfectly parallel, with 

 straight sides; mesosternal process broadly triangular but with the apex 

 acicularly prolonged to the middle of the coxae, the metasternal projection 

 short and broadly angulate; four basal joints of the hind tarsi moderately 

 elongate, equal. Length 2.6 mm.; width 0.65 mm. Utah (southwestern), 

 -Weidt. 



This is a rather obscure species, not wholly typical in some 

 respects like the preceding, though apparently not subgenerically 

 different from Metaxya. The type is a female. 



Metaxya elusa n. sp. Subparallel and very moderately convex, rather 

 shining, the punctures fine and not dense; color piceous, the elytra paler 

 and slightly more flavate, clouded about the scutellum, the head and abdomen 

 black, the legs very pale, the antennae dark, paler basally; head nearly as 

 long as wide, the eyes at fully one-half more than their own length from the 

 base, the tempora parallel and broadly arcuate, being, at the middle, rather 

 more prominent than the eyes, the carinse fine and not entire; antennae 

 somewhat shorter than usual, gradually and moderately incrassate, the outer 

 joints very obviously shorter than wide, the second and third much elongated 

 and unequal as usual; prothorax but slightly wider than long, a little wider 

 than the head and slightly narrower than the elytra, parallel, with the sides 

 nearly straight, rounding anteriorly, the basal angles obtuse but evident, 

 scarcely at all impressed; elytra but slightly wider than long, much longer 

 than the prothorax; abdomen narrower than the elytra, parallel; meta- 

 sternum transverse, very feebly and obtusely cuspid medially; four basal joints 



