13G NORTH AMEUICAX 



tigiious elytra ; sides straight and extremely feebly divergent posteriorly ; 

 border nearly erect, thin ; surface rather feebly arcuate, shining, excessively 

 finely and feebly punctulate. Anterior femora dilated, toothed beneath ; 

 anterior tibiae dilated toward tip and channeled ; second joint of posterior 

 tarsi distinctly longer than the first, equal in length to the third. 



Male. — Fifth ventral segment very feebly and evenly eniarginate in its 

 middle third at apex, contiguous sui-face broadly and feebly impressed ; 

 sixth segment eniarginate at tip, emargination two-thirds wider than deep, 

 sides feebly convergent and straight near the angles, and broadly and 

 arcuately rounded at bottom, contiguous surface feebly impressed anteriorly, 

 sides in the form of low broadly rounded ridged which terminate at the 

 angles of the emai-gination in rather well marked short slightly obtuse 

 teeth ; seventh segment widely divided. 



Female. — Sixth segment elongate, abruptly truncate at the immediate 

 apex, truncation short and very feebly sinuate in the middle. Abdomen 

 broader ; elytra shorter, sides much less divergent ; more closely punctate 

 throughout ; smaller in size. 



Length 5. 0-6.0 mm. 



Lake SiiixM-ior, 2. 



The above species appears to belonj; immediately after peddle in 

 Dr. LeConte's table, and is described from two specimens which I 

 received from Dr. LeConte in a heterogeneous mixture of refuse 

 material in great part unlabeled, and which Dr. LeConte thouglit 

 came from the Lake Superior region. As some of the specimens liad 

 Panama, S. Amer. labels, and others unlabeled I have since found 

 also came from that region, it may be possible tliat the species is in 

 reality a native of Panama. 



It is evidently undescribed from Xortli America, and is of such an 

 interesting type that I have taken pains to describe it at length. 



ORIJS n. gen. 



Attention is called at this opportunity to a very serious error which 

 has entered our tables of genera, by whicli the antennae in all tiie spe- 

 cies occurring in North America and hitherto associated with Scopanis, 

 are termed straight. In our minute very slender species the antennae 

 are very strongly geniculate, but in opacns (Lee.) they are straiglit. 

 Then^ are many reasons, however, for believing that oparns does not 

 belong to the same genus as our small species of ScojiaHis, and a'* it 

 satisfies Lacordaire's description of Sco|)a'us, it is undoubtedly cor- 

 rectly placed; for the minute forms exigmis, picipes and pmicfnfiis, 

 I have created a new genus on account of the very different structure 

 of the maxillary palpi and form of the pronotum, in addition to the 

 geniculate antennae. In the species of Stilicus also which I have 



