174 GEO. H. HORN, M. D. 



although here tlie sti'ire are well marked. It differs especially from 

 that species in having the thorax less roughly punctured, and in 

 shape nearly as long, if not longer than wide. 

 One specimen, Kansas. 



Group III.— PSEUDOLAMPSBS. 



Antennre 11-jointed. Thorax much narrower than the elytra. 

 Anterior coxal cavities open behind. Posterior tibiae not sulcate, 

 apex with small spur. Last joint of jiosterior tarsus globosely in- 

 flated, the claws appendiculate. Body pubescent, elytra punctato- 

 striate. 



In this group we have a structure intermediate between the 

 Monoplati and CEdionyches, with a greater resemblance to the former 

 from the pubescent surface and striate elytra as Avell as the form. 



From the discovery of this form it may be questioned whether all 

 the genera now placed in the Monoplati really belong there. Al- 

 ready one genus, Pachyonychis Clk., has been found to be incorrectly 

 placed there, and it seems to me possible that some of those with 

 slender palpi might be placed in this group. 



One genus is known to me. 



PSEUWOL.AMPSIS n. g. 



Head broad, rather deeply inserted, eyes free, front not carinate, 

 tubercles small and indistinct, clypeus slightly prolonged, truncate. 

 Labrum arcuate. Eyes oval, prominent, rather coarsely granulated ; 

 maxillary palpi slender, second joint slightly thicker toward apex, 

 third much shorter, obconical, fourth more slender, but as long, acute 

 at tip. Antennre half as long as the body, gradually thicker toward 

 apex, first joint elongate oval, second ovate, half as long as first, 

 third slender, as long as the second, joints 4-10 nearly equal in 

 length, but gradually broader, eleventh longer, the tip broadly conical. 

 Thorax a little wider than long, not narrowed in front, lateral niar- 

 gin entirely obliterated ; scutellum small. Elytra nearly twice as 

 wide at base as the thorax, humeri prominent, sides feebly arcuate, 

 very little wider at middle than at base, disc convex, a distinct post- 

 basal impx'ession extending obliquely backward from the suture to 

 the sides, surface punctato-striate. Prosternum moderately separating 

 the coxae, very slightly dilated at apex, the coxal cavities rather 

 widely open behind. Mesosteruuiu distinct, oblique. Ventral seg- 

 ments free, the first longer, next three equal, fifth longer. Legs 



