yo MEMOIRS ON THE COLEOPTERA. 



than the two preceding, the second rather long, subcylindric, the third very 

 much shorter, obconic; prothorax short and strongly transverse, much wider 

 than the head and only slightly narrower than the elytra, slightly widest 

 before the middle, with the sides broadly rounded, becoming a little more 

 convergent and straighter basally, very feebly impressed along the median 

 line; elytra distinctly transverse though much longer than the prothorax, 

 parallel; abdomen much narrower than the elytra, parallel throughout, 

 with straight sides, finely, sparsely punctulate, the fifth tergite but little 

 longer than the fourth, the sixth (c?) broad, the apex gradually and rather 

 feebly sinuate medially, rectilinear at each side of the sinus to a very small 

 tuberculate angle at each side, or (9) with the apex broader and sinuato- 

 truncate medially. Length 2.8 mm.; width 0.62 mm. Rhode Island. 



It is possible that I may have confused two closely allied species 

 in my series, for in the only series furnishing males, the head is 

 slightly less developed in both sexes, less closely or distinctly punc- 

 tate and with less swollen tempora than in the three female types. 

 If there are two species, however, they are very closely allied and 

 the sexual characters are likely to be virtually similar in each. 



Atheta (Rovalida) piceicornis n. sp. Similar to the preceding, except 

 that the antennae are blackish-piceous, paler basally, the second joint less 

 elongate, cylindric, the third only just visibly longer than wide, both moder- 

 ately and subequally obconic, with straight sides, the third joint not con- 

 stricted basally; eyes prominent, larger, at their own length from the base, 

 the tempora not laterally swollen; frontal punctures coarse but much less 

 dense than in the preceding; prothorax nearly similar but only just visibly 

 narrower than the elytra, the latter and the abdomen similar, the sixth ter- 

 gite (c?) with the apex subevenly and very broadly, angularly sinuate from 

 side to side, with the usual very minute tubercle at each side, the surface 

 with a small indentation at each lateral third just behind the middle. Length 

 2.3 mm.; width 0.55 mm. New Jersey. 



The structure of the head and antennae and still wider prothorax 

 will readily distinguish this species from cribraticeps. 



Atheta (Rovalida) submaritima n. sp. Similar in coloration, sculpture and 

 vestiture but with the prothorax less transverse and very distinctly narrower 

 than the elytra, the head with smaller and obsolescent punctuation, the 

 second antennal joint longer, the third also longer than in piceicornis, very 

 much shorter than the second, both obconic with straight sides throughout, 

 the outer joints not quite so broad or transverse as in cribraticeps; male sexual 

 characters as described above for that species, the elytra similar. Length 

 2.0-2.3 mm.; width 0.53 mm. New Jersey (Atlantic City). 



The head is barely visibly swollen toward base and its finer, 

 sparse and much feebler punctuation will serve to identify it at once, 

 especially in conjunction with the relatively much narrower and 



