1 8 MEMOIRS ON THE COLEOPTERA. 



short metasternal projection by a notably extended interval, the 

 coxae contiguous, the first four joints of the hind tarsi subequal, 

 the infra-lateral cephalic carinae fine but subentire, the eyes moder- 

 ate and the antennae strongly incrassate, with transverse penultimate 

 joints. The type is the following: 



Atheta (Delphota) cephalina n. sp. Moderately stout and convex, slightly 

 shining, the abdomen more so; piceous-brown, the elytra and legs slightly 

 paler, the head and abdomen black throughout; antennae dark-brown, paler 

 basally ; head transverse, parallel, the eyes not prominent, at their own length 

 from the base, the antennae extending barely to basal third of the elytra, 

 rapidly and strongly incrassate, the 'outer joints distinctly transverse, the 

 eleventh pointed and as long as the preceding two; prothorax about as wide 

 as the elytra, much wider than the head, two-fifths wider than long, parallel, 

 with moderately rounded sides, the basal impression obsolete, the punctures 

 fine and close-set; elytra moderately transverse, much longer than the pro- 

 thorax, closely, rather asperulately punctulate; abdomen slightly narrower 

 than the elytra, the minute punctures numerous but not dense, the sixth 

 tergite ( cf) broadly, rectilinearly truncate, the edge finely, feebly crenulate, the 

 lateral projections very short, flat and rounded, not very different from the 

 other crenulations. Length 2.5 mm.; width 0.6 mm. Iowa, Brendel. 



This species is chiefly remarkable in its very exceptional sexual 

 modifications of the head, which, in the male, is opaque by reason 

 of extremely small strong reticulation, rather flattened above and 

 feebly impressed along the median line; in the female it is more 

 convex, even, shining and very much more feebly and less minutely 

 micro-reticulate. 



Atheta Thorns. 



The species here assigned to typical Atheta, although exhibiting 

 much diveisity of structure, agree tolerably well among themselves 

 in the small or very moderate size of the body, in having the abdo- 

 men parallel or virtually so, the eyes moderate in size, generally 

 al their own length from the base, the antennae moderate in length 

 and gradually incrassate, the mesosternal process acute, the meta- 

 sternal short, the coxae approximate and the basal joints of the hind 

 tarsi subequal among themselves, although the basal joint is occa- 

 sionally a little shorter or longer than the second. In the 

 descriptions the infra-lateral carinae of the head are alluded to 

 simply as carinae. 



Atheta barbarse n. sp. Moderately slender, rather shining, black, the elytra 

 scarcely less so, the legs and antennae piceous; vestiture not dense and rather 

 long; head transverse, parallel, with sparse shallow umbilicate punctures, the 



