OF PHILADELPHIA. 261 



1. H. MEMNONius. — Inner thoracic stria abbreviated a little 

 beyond the middle ; elytra, each with a basal puncture. 



Body black, somewhat polished : head slightly convex, arcu- 

 ated line very distinct : mandibles a little prominent : antenna} 

 dull piceous : thorax with the inner stria abbreviated at about 

 two-thirds the length of the thorax, a very short impressed line 

 on the middle of the base : elytra with the marginal and four 

 dorsal striaa entire ; the fourth hardly reaching the base ; fifth 

 less than half the length of the elytrum ; sutural stria more than 

 half the length of the elytrum ; an obvious impressed puncture 

 at base equidistant from the fourth stria and the scutel : feet 

 piceous : anterior tibias quadridentate. 



Length nearly one-fifth of an inch. 



I received this species from Dr. J. F. Melsheimer, under the 

 name I have adopted. The punctures of [33] the elytra are 

 much nearer to the base than those of the senegalensis as repre- 

 sented by Paykull. 



[Evidently a distorted specimen of H. immunis Er. , with the 

 posterior part of the inner thoracic stria deficient. I formerly 

 considered it as H. interruptus Beauv., (ohtusatus Harris,) but 

 that species is much too large. — Lec] 



2. H. DEPURATOR. — Inner thoracic stria longer; elytra, mar- 

 ginal stria obsolete ; dorsal striae three. 



//. unicolor Melsh. Catal. 



Body black, polished ; head slightly convex, arcuated line very 

 distinct : mandibles a little prominent : antennae piceous : thorax 

 with the exterior stria a little shorter than the inner one, which 

 extends to the basal margin : elytra, marginal stria obsolete, con- 

 sisting only of a series of punctures which extend no further than 

 the middle ; dorsal striae three, entire ; fourth stria consisting of 

 from nine to twelve impressed points, not extending beyond the 

 middle ; fifth stria very short, obsolete, and consisting of two or 

 three impressed points ; sutural stria abbreviated at the middle, 

 generally interrupted at the posterior tip into a short series of 

 punctures : anterior tibiae tridentate ; terminal tooth slightly 

 emarginate ; superior tooth often obsolete. 



Length rather more than one-fourth of an inch. 



Var. a. Marginal line obsoletely continued by the humerus iu 

 punctures. 

 182.5.] 



