3.3G Mr. I). Stff[)'.s Contrlhnfions to the 



cessor, each (listlnctly lon<2;er than broad. ral[)i cloiioate, 

 white, the terminal joint slender and elongate. Head 

 nnich smaller than the thorax, very shining black ; the 

 mandibles red ; the antennal tubercles reddish ; a single 

 fine pnnctnre on the front margin of the clypeus, a depres- 

 sion inside the tubercles, and behind this two punctures 

 on each side, and a few punctures on each side of the 

 vertex. Thorax very shining, black, about as long as 

 broad, transversely convex, not narrowed behind, with an 

 irregular row of four or five coarse punctures on each side 

 the middle ; Avith four or five others outside these, some 

 fine punctures on the front margin, and with a few fine 

 obsolete punctures scattered over the surface. Scutellum 

 black, not punctured. Elytra slightly longer than the 

 thorax, shining red, deeply and very coarsely punctured, 

 the punctures not dense. Hind body short, oj^aque, the 

 segments obscurely punctured, the three or four basal 

 ones with ashy pubescence on eacVi side ; the 7th segment 

 white, with a black patch on the middle. Legs rather 

 stout, white. The sternum, with the coxa? and imder 

 face of hind body, reddish. 



In the male the ventral ]^late of the 7th segment has the 

 middle part greatly produced, so as to form a large tongue- 

 like process ; it is separated by a deep notch from the 

 lateral portion, and is finely punctured in the middle ; 

 that of the 8th segment forms part of the intromittent 

 organ ; it is polished and quite smooth, from beyond the 

 middle gradually narrowed to the extremity, where it forms 

 a sharp spine. 



Amazons; a single male, without special locality. 



This very remarkable species is allied to the J^. egens, 

 though extremely different from it in appearance. I should 

 suppose the Columbian P. crassicollis, Er., may be an 

 allied species. 



ffiDODACTYLUS. 



The two species here described are only referred wit' 

 doubt to the genus (Edodactylus, hitherto representett 

 only by CE. fuscohrunneus, from Chili. They are re- 

 markable by the elongate anterior coxa:^, and the great 

 development of the side pieces of the thorax, and may be 

 considered the Austro-Columbian representatives of the 

 Arctogaial and Australian Prociri'us, to which genus the 

 Chilian species approaches in facies more nearly than do 



