NORTH AMERICAN COLEOPTERA. 53 



A. riifipes Linn. Oblong, moderately elongate, parallel, piceous to reddish 

 lirown, shining. Antennte and palpi reddish brown. Head feebly convex or 

 slightly elevated at middle of front 9. surface very smooth with excessively 

 fine punctures, others slightly more distinct toward the sides. Clypeus almost 

 semi-circular, without trace of emargination, the genae prominent, subacute. 

 Thorax twice as wide as long, slightly narrowed in front, sides with short fim- 

 briiu, feebly arcuate, the extreme lateral margin thickened, hind angles obtusely 

 rounded, base regularly arcuate without trace of marginal line, disc moderately 

 convex, almo.st entirely smooth, with a few punctui-es along the sides, especially 

 near the anterior and posterior angles. Elytra as wide at base as the thorax, 

 humeri obtuse, sides parallel, strife moderately deep, finely punctured, intervals 

 slightly convex, sparsely very finely punctulate. Mesosternum coarsely punctate, 

 an opaque space on each side. Metasternum at sides and abdomen sparsely punc- 

 tate. Anterior tibiae smooth in front, tridentate externally, serrate above, the 

 first tarsal joint longer than second. Posterior femora sparsely punctulate, with 

 an impressed line posteriorly formed of clo.sely placed punctures, the first tarsal 

 joint a little longer than the next three. Length .42-.50 inch ; 11-13 mm. 



Male. —Head evenly convex. Thorax a little broader than the elytra and less 

 convex. Metasternum slightly longitudinally impressed. 



Female. — Head with a slightly greater convexity at middle. Thorax not wider 

 than the elytra. 



This species will be readily known by its large, size, semicircular 

 head, thickened thoracic border, and the comparatively smooth sur- 

 face of the entire body. 



Three specimens are known to have been taken in our country, 

 two by Mr. H. Ulke at Deer Park, Maryland, attracted by light at 

 night, and another has been seen by Dr. Hamilton captured in 

 southern Pennsylvania. The occurrence of a comparatively common 

 European species in such an inland and comparatively wild region 

 without having even been found about commercial centres leads to 

 the belief that it may be indigenous to the region and not introduced. 

 A parallel case may be cited in Nomius j)ygm(eus, which occurs very 

 rarely in southern Europe, and at times abundantly in the Lake 

 Superior region. 



A. (lepressus Kug.— Oblong oval, moderately convex, black, moderately 

 shining (elytra sometimes red). Antennaj piceous, the club black, palpi piceous. 

 Head moderately convex, moderately finely not closely punctate, front without 

 trace of tubercles. Clypeus semicircular, without trace of emargination the 

 gense prominent and arising rectangularly in front of the eye. Thorax not quite 

 twice as wide as long, distinctly narrowed in front, the sides nearly straight pos- 

 teriorly, arcuate in front, hind angles rounded, base arcuate without trace of 

 marginal line; disc moderately convex, the punctures moderate in size and nearly 

 equal, closely, but not densely placed. Elytra as wide at base as the thorax, hu- 

 meri obtuse, disc striate, the striie rather closely ])unctate. intervals feebly convex, 

 confusedly, but not closely punctate. Mesosternum alutaccous, but feebly shining. 

 Metasternum at middle shining, coar.sely sparsely punctate, at sides opaque, less 



