NOUTII AMKRICAN COLKOPTKRA. 



present and well marked in all the specimens examined. It starts at 

 the humerus below the umbone and reaches the apex. 



These costae are subject to great va- 

 ^-^^v^S^^ riation. It will be observed that the 



^^""^ "^i-lT^fe-^.^ males are usually more costate than the 



females and specimens of the latter .*ex 

 * without any costae, except the subhu- 



meral, are quite common in ferruginea 

 ^^-/ WK ■-• sind albida. 



From the tenor of the preceding re- 

 marks it will be evident that no char- 

 acters worthy of consideration are to 

 J,,--T=-»-_ "Ni>'' be found in the thorax and elytra for 

 2, \,^ specific separation as these parts vary 



sexually and individually. 



On the annexed cut will be found 

 representations of the hind tibiie of the 

 males of the four species. The two forms of antennre are shown in 

 the figures, 1 representing albida, while the other three species have 

 the other form. 



The following table will serve to separate the species: 



Antennae with joints 4-10 very nearly equal in length, eleventh longer than 

 tenth. 



Outer joints of antennse piceons; hind tibise of male simple oariiiata. 



Antennsp entirely ferruginous or paler. 

 Posterior tihise of male with a curved process on the i)osterior edge near the 



tip; no terminal spurs simplex. 



Posterior tibia? of male sinuate on the front edge near the tip and with 



distinct spurs forriigiiiea. 



Anteiuue with joints 8-11 nearly e(iiial in length and very obviously sliortei- 

 than the preceding joints. 

 Posterior tibiae of male simple and with terminal spurs ,/.:.-...! albida. 



K. carinata Mann. 



Male. — Head and thorax piceous-black, shining, coarsely punctate. 

 Thorax obtusely angulate at the sides, rarely feebly tridenticulate. 

 apical and basal margins often paler in color than the disc. Elytra 

 testaceous, but never very pale, sutural margin piceons. Body be- 

 neath piceo-testaceous. Legs piceous, the base of the femora and 

 (;oxie testaceous. Hind tii)iie nearly simple, merely slightly thick- 

 ened at a|iex. 



Female. — Rufo-testaceous above. Antennie similar in color to the 

 males, but not quite so daik. Thorax ratliei- more acutely angulate 



TKAXS. AM. KSy. SOC. XIX. JANUARY, ISO'i. 



