-96- 



punctured. Thorax distinctly narrower in front, sides very obtusely angulate, 

 widest l^ehind the middle, nan^owed to base, more obliquely narrowed in front, 

 margin feebly crenate, sparsely ciliate, disc convex, the punctures moderately coarse, 

 variably placed, sometimes closely and equally, sometimes sparsely and irregularly 

 on the disc, leaving smooth spaces, but no smooth median line ; a distinct depression 

 of the basal margin externally. Elytral punctures finer, much more dense, somewhat 

 rugulose, costse evident. Pygidium moderately and somewhat irregularly punctured, 

 less densely so in the female. Metasternum densely punctured, the hair long and 

 dense in the male, short and sparse in the female. Abdomen finely punctate, more 

 dense at the sides, the last two segments much more coarsely and densely punctate. 

 Last joint of maxillary palpi fusiform, not impressed. Length .75 — .85 inch = 19 

 to 21 mm. 



Habitat — Washington, D. C, Tennessee, Virginia, Ohio. 



Male. — Antennal club slightly longer than the funiculus. Pen- 

 ultimate segment with a very strongly elevated, overhanging arcuated 

 crest, occupying nearly the entire length of the segment, behind which 

 there is a deep, transverse, punctured impression. In some specimens 

 the crest is divided at the middle, and a longitudinal impression extends 

 forward to the middle of the preceding segment. Last ventral with a 

 quadrate, punctured impression, the hind margin with a small deep 

 emargination. Claws arcuate, tooth rather extra median, shorter than 

 in the female. The fixed spur is quite short, less than half the length of 

 the outer, and proportionately less stout. 



Female. ^Antennal club shorter than the funiculus. Pygidium 

 more elongate, the punctures smaller and more sparse. Posterior femora 

 stouter, spurs of hind tibiae short and stout. Penultimate ventral seg- 

 ment with a strongly impressed line near the hind margin, behind which 

 the segment is depressed. Last ventral segment sinuate at apex, scarcely 

 emarginate. Tarsi nut shorter than in the male. 



Variations. — In a series of nine specimens no variations are ob- 

 served. The species is remarkably constant in form and color. 



About a dozen specimens of this interesting form were taken at 

 Washington during the season of 1888. None of the local collectors 

 had ever taken it before, and it was but sparingly taken among the 

 hundreds of other specimens. Mr. Schwarz received a single male 

 specimen from the mountains of Tennessee, Mr. Alwood saw a specimen 

 in a local collection in Virginia, and I saw several specimens in Mr. 

 Dury's collection at Cincinnati, Ohio. The species is therefore probably 

 widely distributed, though rare. 



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

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

 sexual characters refer it rather with rugosa and allies, though the thorax 

 is not evidently angulated, and the punctures not nearly so coarse. In 



