StayhijUnidcR of the Amazon Valley. 255 



palpi is more slender tlian in Solsky's figures, and the 

 4th joint, which is concealed within the 3rd, appears to 

 be much more slender and acuminate ; the last joint of 

 the labial palpi is more slender, quite cylindrical, and 

 only about half as long as the preceding joint. I am, 

 therefore, imable to consider these species as congeneric 

 with the North American Dacnochilus Icetus, and prefer 

 to place them for the present in the genus Lithocharis 

 rather than establish a new genus for them. 



Erichson describes the L. macidaris and L. anrjidaris 

 as possessing a labrum similar in structure to the four 

 species I have here described, and I have therefore great 

 doubts Avhether the L. ongularis is correctly referred to 

 Dacnochilus. I have another closely allied species of the 

 group from Rio de Janeiro. 



1. Lithocharis latro, n. sp. Lata, depressa, fusco- 

 ferruginea, antennis rufis, pedibus testaceis, dense sub- 

 tilissime punctata, opaca; elytris dilutioribus, thorace 

 paulo longioribus ; tarsis anterioribus dilatatis. Long. 

 Corp. 3^ hn. 



Antennre rather slender, reddish, 1^ lin. in length, not 

 at all thickened towards the extremity ; 3rd joint dis- 

 tinctly longer than 2nd, 5 — 10 each slightly shorter than 

 its predecessor, lOtli longer than broad. JPalpi red, last 

 joint elongate and slender. Labrum red, with a single, 

 short, obscure tooth in the middle, on either side of which 

 it is a little emarginate. Mandibles red, the left with 

 three, the right with foui', distinct teeth. Head large, 

 slightly broader than the thorax, the hind angles slightly 

 produced, so that the vertex is a little emarginate, very 

 densely and finely punctured. Thorax very nearly as 

 long as broad, fully half a line in length, the sides a little 

 narrowed behind, very densely and finely punctured, with 

 a veiy narrow indistinct line along the middle. Elytra 

 f lin. in length, taken together rather broader than long, 

 paler in colour than the head and thorax, densely and 

 finely punctured. Hind body broad, very densely and 

 finely punctured. Legs yellow; front tarsi moderately 

 dilated. 



In the male the ventral plate of the 6th segment of the 

 hind body is rounded in the middle and emarginate on 

 each side ; the ventral plate of the following segment has 

 a very broad and deep excision in the middle. 



Ega ; a single specimen. 



