46 MEMOIRS ON THE COLEOPTERA. 



Atheta bucolica n. sp. Dark piceous, the head black, the abdomen dark 

 testaceous, shaded black subapically, the ventral segments darker toward 

 their bases, the legs very pale, the elytra pale, slightly darker extero-pos- 

 teriorly and near the scutellum; surface moderately shining, not strongly 

 sculptured; head transversely orbicular, the eyes at less than their own 

 length from the base, the carinse fine, subentire; antennae slender and pale 

 through the fourth joint, then gradually and moderately incrassate and black 

 to the tip, rather small in size, the outer joints very moderately transverse, 

 the last gradually and acutely pointed and notably longer than the two pre- 

 ceding, the second and third slender and elongate, the latter slightly the 

 longer; prothorax moderately transverse, parallel and evenly rounded at 

 the sides, distinctly wider than the head and narrower than the elytra, which 

 are rather strongly transverse, though evidently longer than the prothorax; 

 abdomen narrower than the elytra, the sides parallel and feebly arcuate; 

 mesosternal process long, extending to apical fourth of the coxae, gradually and 

 sinuously narrowing but still rather wide even at the strongly rounded apex, 

 which is not very distant from the broadly and obtusely angulate and blunt 

 metasternum, the depression broadly, transversely convex; first two joints 

 of the hind tarsi short, equal, the next two longer and equal. Length 2.75 

 mm.; width 0.73 mm. Mississippi (Vicksburg). 



Though described from the female, this species is so evidently 

 homologous in its structure with the preceding, that there can be 

 but little doubt that the sixth male tergite is crenate at tip. It is 

 distinct in its antennal and sternal structure and in coloration. 



Traumoecia Rey. 



I have applied this subgeneric name to a few species which re- 

 semble Atheta in all essential structural characters, but are of very 

 small size and rather slender form. 



Atheta (Traumoecia) ithacana n. sp. Dark piceous, the head and abdomen 

 blackish, the elytra dark piceous-brown, the legs pale; surface rather shining, 

 the micro-reticulation moderate, stronger on the elytra, the punctures very 

 fine, asperulate and close on the elytra; head moderately transverse, the eyes 

 rather large and more prominent than the tempora, which are shorter, parallel 

 and straight to the rounded basal angles; carinae fine, feeble, not quite entire; 

 antennae extending to the middle of the elytra, rather thin, the outer joints 

 moderately transverse, the last as long as the two preceding, the second long, 

 cylindric, the third much shorter, obconic; prothorax moderately transverse, 

 distinctly wider than the head and narrower than the elytra, parallel but only 

 feebly arcuate at the sides, finely impressed along the median line; elytra 

 but slightly wider than long, much longer than the prothorax; abdomen 

 much narrower than the elytra, parallel, very slightly narrowing apically, 

 the fifth tergite much longer than the fourth, the sixth feebly and gradually- 

 sinuate medially at tip in the type; mesosternal process extending slightly 

 behind the middle of the coxae, gradually and finely pointed, separated by a 

 considerable interval from the rather short but broadly angulate metasternum, 



