198 ]Mr. D. Sluup's Coittrihuilons to the 



sliinlng Llack, the -whole of the middle part im])Tnictato, 

 a row of coarse punctures at the back, two other coarse 

 punctures near the inner hind angle of the eye, and another 

 on each side between the eyes, the sides behind the eyes 

 ■with liner ])unctures; the \nider surface is also impunc- 

 tate, excc])t at the sides. Thorax a little narrower than 

 the elytra, slightly narrowed behind, not twice as long as 

 broad; black, shining and im])unctate, except a few ])unc- 

 tures near the front angles. Scutellum with four or five 

 coarse pimctures. Elytra not qiute so long as the thorax, 

 dark shining blue, rather coarsely punctured. Hind body 

 shining black, hind portion of the Gth and the Avhole of 

 the 7th segment dark reddish, sparingly punctured. Legs 

 pitchy black ; tarsi slender. 

 Ega ; one specimen. 



3. Linidius extrcmus, n. sp. Niger, nitidus, elytrls 

 cyaneis fortiter ])unctatis, ano rufo-testaceo ; capite lato, 

 fere circvdai'i, latcribus et vertice punctatis, utrinque pone 

 oculos punctis tribus majoribus. Long. corp. 7 lin. 



This insect so greatly resembles the L. tenvijies, that a 

 reiterated description is useless. In L. extremus the head 

 is broader, more curved at the sides, and so more cir- 

 cular in form ; the punctures at the side of the head are 

 more closely packed, and on each side, just behind and 

 internal to the eye, are three larger punctures, ])laced near 

 to one another, so as to form a triangle. The extreme 

 vertex, as in L. tenuipes, bears s])aring coarse punc- 

 tures. The basal portion of the mandibles is more slender 

 than in L. temiipcs, and the legs and tarsi are even a little 

 more slender than in that species. 



Upper Amazons; a single individual found by ^Nlr. Bates. 



Xantholinus. 



Under this generic name there are at present placed 

 something more than one hundred species, found in all 

 parts of the world. I enumerate here ten Amazonian 

 species, seven of which are new; but I have no doubt the 

 species to be found in this rich valley are very much more 

 numerous than this. The genus at present contains a 

 lumiber of very different forms, some of which have been 

 considered by some authors as distinct genera, but have 

 not beeii generally received as such at present. About 

 thu'ty species from South America have been as yet de- 



