1901.] PHYTOPHAGOUS COLBOPTBBA. 161 



elytra sculptured like the thorax but rather more strongly so, with 

 the usual four ridges strongly marked, of which the first and second 

 are connected by a transverse ridge below the middle, the third 

 runs parallel with the second and commences at the middle of the 

 base, it is likewise connected with the fourth ridge by a transverse 

 costa below the base, less strongly marked than the first transverse 

 rido-e : pygidium flavous, reticulate throughout ; abdomen and legs 

 reddish, sculptured like the pygidium ; the tarsi broad, flavous. 

 Hah. Amazons, Cavallo-Cocho (my collection). 

 This is a species of easy recognition on account of the absence 

 of any elytral tubercles aiid the bright red coloration. G. Tcermes 

 ao-rees in this respect with the present species, but has distinctly 

 tuberculate elytra. Klug has described and figured a species under 

 the name of G. granulata which seems to come very near to the 

 one here described; but Lacordaire, who gives a more detailed 

 description of it under the name of G. gysseleni KolL, speaks of 

 tubercles and numerous other elytral obscure ridges of which I can 

 see no trace ; he also gives the length as 1^ line, while Klug says 

 2 lines as the size of his species ; the structure of the thorax also 

 differs, inasmuch as 0. gysseleni has no sulcus at the top of the 

 elevation. 



Chlamts tubebculicollis, sp. n. 



Bluish or violaceous black, the head, the anterior part of the 

 thorax (more or less), and the anterior legs fulvous ; thorax with a 

 truncate elevation, bituberculate in front ; elytra rugose-punctate, 

 with a strongly raised subsutural, sinuate ridge joined to a 

 straighter ridge from the base to the apex, the latter with two 

 tubercles ; legs spotted. 

 Length 3-3i millim. 



Of elongate and parallel shape, the head finely rugose and 

 punctured, flavous, the extreme vertex blackish ; antennae flavous, 

 the apical'joints slightlv darker, third and fourth joints compara- 

 tively thin and elongate, the others but slightly thickened for 

 this genus ; thorax with the middle portion strongly raised, the 

 top truncate, strongly rugose, the anterior portion terminating 

 in two compressed tubercles of large size, between which a smaller 

 one is placed, the sides likewise furnished with two small callosities, 

 the anterior margin more or less flavous, the rest of the surface 

 violaceous black, the posterior margin in front of the scutellum 

 truncate, the latter impunctate ; elytra with the suture crenulate 

 throughout, the ridges strongly raised, the first strongly sinuate, 

 is placed near the suture, where it joins the second ridge below the 

 middle, this latter is nearly straight and commences as usual at 

 the middle of the base, at its middle it sends off a short transverse 

 branch which unites wdth the fourth ridge near the lateral margins, 

 the third ridge runs close and parallel to the second for a short 

 distance below the middle ; below the point of juncture with the 

 first, the second ridge again curves round to the suture, enclosing 

 an oblong cavity ; an elongate tubercle at the apex near the suture 

 Peoc. Zool. Soc— 1901, Vol. I. No. XI. 11 



