78 GEO. H. HORN, M. D. 



fine and sparse at the middle of the front. Clypeus broadly feebly emarginate, 

 the angles broadly rounded, sides arcuate, gensp moderately prominent, obtuse. 

 Thorax one and a half times as wide as long, apparently narrowed slightly at 

 base, sides feebly arcuate, hind angles broadly rounded, base arcuate, the mar- 

 ginal line distinct, disc moderately convex, the punctures coarse and close at the 

 basal half, denser and finer at the front angles, the punctures at middle gradually 

 finer from the basal toward apical margin. Elytra as wide at base as the tborax, 

 the humeri slightly dentate, surface moderately deeply striate, strise not distinctly 

 punctate, intervals very flat in front, cariniform on tbe apical declivity, the inner 

 sides deeply crenate, the surfaces finely indistinctly punctulate near the base. 

 Mesosteruum coarsely punctured and opaque in front, not carinate between the 

 coxiB. Metasternum sparsely punctulate. Abdomen sparsely punctate, coarsely 

 at sides, finely at middle, the segments crenate in front. Anterior tibite acutely 

 tridentate externally, subcrenate above. Posterior femur smooth without trace 

 of a posterior marginal line, the posterior tibia without accessory spiuule, the 

 first tarsal joint a little longer than the long spur. Length .18 inch ; 4.5 mm. 



A well marked species in the present series by the very fltit elytral 

 intervals, with less lustre than w^ould be expected from one so black, 

 from the fact that the surface of the elytral intervals is extremely 

 finely alutaceous. At first glance the striae would seem to be punc- 

 tured, but the inner sides of the intervals are deeply crenate causing 

 that ap})earance. 



It is well to observe that in this species the usual obtuse, polished 

 carina is not present between the middle coxaj. While there can be 

 no doubt that the present species is a true Atccnius, the absence of the 

 carina here makes a similar character in socialis less remarkable. 



Taken at Atlantic City by Mr. Henry Wenzel, to whom I dedicate 

 the species as an evidence of my appreciation of the kind help at all 

 times given me from his cabinet. Occurs also in Florida (cab. LeC.) 

 one in ray cabinet marked Colorado, which may be open to doubt. 



A. ovatullis Horn. — Form rather robust and moderately convex, recalling 

 Lecoiitei, piceous black, moderately shining, legs brownish. Antennae rufotesta- 

 ceous. Head moderately convex, densely and rather coarsely puuctured, the 

 puncturesbecoming rapidly finer to the front and at the sides. Clypeus slightly 

 impressed in front; broadly, but feebly emargiuate at middle, the angles broadly 

 rounded, sides arcuate, geuse obtuse. Thorax about one and a half times as wide 

 as long, apparently slightly narrower posteriorly, sides feebly arcuate, hind an- 

 gles obtuse, base arcuate, with a slight sinuation near the angles ; disc moderately 

 convex, the punctures at middle coarse, rather close, becoming finer to the front, 

 at sides densely punctured and o])aque. Elytra as wide at base as the thorax, 

 elongate oval, humeri finely dentate, sides moderately arcuate, striae deep, trans- 

 versely not closely punctate, intervals very convex, subcarinate at apex, with 

 indistinct punctures on the inner side below the apex of each interval. Meso- 

 steruum opaque, coarsely punctured, carinate between the coxse. Metasternum 

 coarsely punctured. Abdomen coarsely, not densely, punctured from side to side, 



