Coleopterological Notices, VII. 66T 



in the United States would therefore seem to be desirable. It is 

 quite evident that none of our genera, except Zygops, can be 

 held to be identical with the tropical groups defined by Schon- 

 herr ; I have therefore regarded them as different in the follow- 

 ing table and have assigned new names to the Piazurus and Cop- 

 turus of LeConte : — 



Pygidium large, vertical and exposed, the axial line of the abdomen nearly 

 straight; mesosternnm vertical, the side-pieces not obliquely truncating the 

 elytral humeri; eyes very approximate on the front; antennal club well de- 

 veloped, very densely pubescent, with the basal joint moderate in size; four 

 anterior femora minutely, the posterior strongly, toothed beneath ; species 



moderately large in size , Zygops 



Pygidium completely concealed by the elytra. 

 Abdomen rapidly ascending toward tip. 



Mesosternum excavated for the reception of the tip of the beak, the mes- 

 epimeron obliquely truncating the elytral humeri ; eyes narrowly sepa- 

 rated; antennal club rather well developed, feebly pubescent, strongly 

 annulate, the basal joint constituting 3^ of the entire length; femora 



minutely and subequally toothed beneath; body small in size GelllS 



Mesosternum not excavated, the beak free at tip; mes-epimeron narrowly 

 and feebly truncating the humeri obliquely ; femora without trace of 

 tooth. 

 Eyes widely separated on the front; antennal club large, elongate-oval 

 and well developed, pubescent and strongly annulated, the basal joint 

 constituting % of the entire length; vestiture nearly as in Copturodes; 



body moderately small Gyrotus 



Eyes narrowly separated or subcontiguous on the front. 

 Antennal club well developed, distinctly though not very densely 

 pubescent, strongly annulated, the basal joint constituting scarcely 

 3>'2 of the entire length; scales of the vestiture broadly oval andnon- 



strigose; species small or moderately small in size Copturodes 



Antennal club very small, elongate-oval and subglabrous, becoming 

 pubescent at tip, feebly annulated, the basal joint constituting 

 much more than }4, of the mass; ornamental scales elongate and 



strigose; species very small in size Zygomicrus 



Abdomen horizontal throughout; eyes approximate on the front; elytral 



humeri not obliquely truncated. 



Beak free throughout, the prosternal channel narrow and subobsolete ; an- 



tennse stout, the club well developed; femora miniitely and equally 



toothed beneath ; body moderately small, densely squamosa and with 



coarse elytral strise Acoptus 



Beak not quite free, the prosternal groove well defined though shallow 

 and serving as a partial shelter in repose; antennae very slender, the club 

 small; femora not toothed; body very small and convex, subglabrous 

 above, with widely exposed humeri, the elytral strise fine....Psoiiius 



