] PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 511 



up one specimen in the morning on a walk in the Smithsonian grounds, 

 badly eaten by ants, and fished another out of a fountain in the White 

 House grounds. Mr. Ulke took two specimens at the electric light. Mr. 

 Schwarz received a single male specimen from the mountains of Ten- 

 nessee, and Mr. Alwood saw a specimen in a local collection in Vir- 

 ginia. I saw several specimens in Mr. Dury's collection at Cincinnati, 

 Ohio, and the species is probably widely distributed, though rare. 



In group characters it would seem at first referable to the fraterna 

 section of the fusca group, but the large size, very long tarsi, and the 

 marked sexual characters refer it rather with ragosa and allies, though 

 the thorax is not as evidently angulated, and the punctures are not 

 nearly so coarse. In the short spur of the male it resembles inftdcli.s, 

 while the distinct elytral costa; as well as the male characters make it 

 evidently distinct. I take pleasure in dedicating this strongly marked 

 species to my good friend and mentor, Dr. Horn. 



The genital structure is very strongly marked in both sexes. In the 

 male the claspers are very dissimilar and very large. In the female 

 there is a combination of superior plate and pubic process, which is 

 approached but not equaled in other species in this group. 



47. L. biimpressa Smith. 



Oblong, scarcely ovate, pale reddish-brown, shining. Clypeus mod- 

 erately deeply emargiuate ; margin narrowly reflexed, densely and rather 

 coarsely punctured, as is also the front. Thorax distinctly narrower in 

 front ; sides obtusely angulate, widest at middle, narrowed to base, more 

 obliquely narrowed in front; margin irregular, scarcely crenate, sparsely 

 ciliate ; disk convex, the punctures coarse and rather closely placed, a 

 distinct smooth median line, a distinct impression of the basal margin 

 externally, and a distinct foveate impression at each side nearly oppo- 

 site the angle; elytral punctuation finer, more dense, somewhat rugulose, 

 sutural costa distinct, the others feeble ; metasternum closely punctate, 

 with moderately long hair ; pygidium rather sparsely, finely, and ir- 

 regularly punctured ; claws arcuate, with a strong median tooth ; last 

 joint of maxillary palpi fusiform, not impressed. 



Length, .70 inch ; 18 mm . 



Habitat. — Manhattau, Kans., '76. 



Male.— Antennal club nearly as long as the stem. Abdomen flat- 

 tened at middle, sparsely finely punctuate at the sides, the last two seg- 

 ments more coarsely. Penultimate ventral segment with a rather feebly 

 elevated, strongly arcuated ridge, behind which the segment is deeply 

 impressed and punctured, last segment with a somewhat quadrate de- 

 pression. 



Only a single male is known to me, the source of which I do not know. 

 It seems to be an old specimen, though in good condition, received at 

 the Department of Agriculture, and used in the exhibition series to rep- 

 resent/^™, I have placed it in this group, and associated it with act- 

 tula, though the specimen has very evidently but nine antennal joints 



