1888.] PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 515 



similarity to longispina, with yet sufficient differences to make the dis- 

 tinction obvious. 



57. L. implicita Horn. 



There are 2 $ and 2 9 in the collection given by Mr. Pergande, taken 

 at St. Louis, Mo., in June. It appears a widely distributed speeies 

 and locally not uncommon. 



The genitalia of both sexes have been examined, and in the male the 

 claspers are dissimilar, as usual. In the female there is a distinct 

 resemblance in the one organ both to pubic process and superior plate, 

 characteristic of injidelis and some others. All the specimens seen 

 by me are remarkably constant in appearance. 



58. L. innominata Smith. 



Oblong oval, convex, chestnut-brown, shining. Clypeus moderately 

 deeply, acutely emarginate, the border moderately renexed, surface 

 closely rather coarsely punctate, front less densely and more coarsely 

 punctate. Thorax, sides arcuate, narrowing rather regularly toward 

 apex, the margin scarcely irregular, not crenate, with long ciliae, the 

 punctures small, sparse, and irregularly placed, no median line, a dis- 

 tinct channel along the base externally. Punctures of elytra more 

 coarse and dense than those of thorax, the costa? evident but not prom- 

 inent. Pygidium sparsely indistinctly punctate. Metasteruum punc- 

 tate, the hair ( $ ) long and abundant, abdomen indistinctly punctate at 

 the sides, the last two segments more coarsely punctate ; claws arcuate, 

 a long acute median tooth, smaller on anterior; last joint of maxillary 

 palpus fusiform, not impressed. Length, 72 inch., 18 mm . 



Habitat. — Winona, Minn., U. S. National Museum, Ace. 21542. 



Male. — Antennal club as long as the stem. Abdomen flattened and 

 slightly concave at middle. Penultimate segment with a rather feeble 

 semicircular depression, on each side of which is a short oblique tuber- 

 osity; last segment transversely concave, almost cupuliform.- Inner 

 spur of hind tibia rather more than half the length of the outer, stout 

 and straight. 



Female. — Unknown. 



This species is known to me in a single male specimen only. It is 

 intermediate in some respects between implicita and balia, yet abun- 

 dantly distinct from either. The male characters are more like those of 

 implicita, save that the last ventral segment is concave, but the very 

 smooth sparsely punctured thorax is distinctive. The description is 

 after Dr. Horn's description of implicita, and the differences between 

 the two are thus readily ascertainable. It is a larger insect than either 

 implicita or balia. 



In the structure of the male genitalia it is closely allied to implicita, 

 differing in details, however, if not in type. It would be interesting to 

 know the female, to see whether the resemblance to implicita is as dis- 

 tinctly carried out in that sex. 



