55 
Longicorn Coleoptera of the British Museum and some of the 
species were included by him under AnisoceruSy from which they 
are distinguishable by the naked antennae. 
1. Gymnocerus capucinuSy White. 
Anisocerus capucinus, White, Ann. Nat. Hist, xviii. 1. 1. f. 7 ; Cat. Long. 
Col. Brit. Mus. ii. p. 406. 
This remarkably beautiful species, which in its colours and 
markings resembles some kinds of Doryphora of the Chryso- 
melidae group, I found only at Caripi, near Para. It occurred 
sparingly, in January, on dead branches of trees in the forest. 
The third antennal joint is considerably thickened at the apex. 
2. Gymnocerus dulcissimusy White. 
Anisocerus dulcissimus, White, Cat. Long. Col. Brit. Mus. ii. p. 406. 
I met with this species only on one occasion, in the forests on 
the banks of the Cupari, a branch of the Tapajos, in 4° S. lat. 
and 55 W. long. It is still more beautiful in colours than G. 
capucinus ; but I believe, with Mr. White, that it may be only a 
modification of that species. The third antennal joint is less 
thickened at its apex than in G. capucinus. 
Three individuals only occurred, on a decaying branch in the 
depths of the forest. 
3. Gymnocerus cratosomdidesy n. sp, 
G. ovalis, convexus, tomentosus, ochraceo-fulvus : thorace Isevi : 
elytris seriatim punctato-granulatis, singulis prope basin tuberculo 
magno glabro instructs et apud medium breviter quadricarinatis, 
fascia lata undulata pone medium et marginibus posticis fuscis. 
Long. 9| lin. $ . 
Head dull-greenish yellow, tomentose, smooth. Antennae slen- 
der, shining black, about the length of the body, the third joint 
scarcely thickened at the apex. Thorax about half the breadth 
of the elytra ; lateral tubercles rather small, acute, the surface 
quite impunctate ; the disk tawny brown ; the sides yellowish. 
Elytra very broad at the base, the breadth at that point being 
three-fourths the length ; they are very gradually narrowed to 
two-thirds the length, thence more rapidly narrowed to the apex; 
each has in the middle, near the base, a very large naked obtuse 
tubercle ; behind this, on the disk, are four short raised longi- 
tudinal lines, the one nearest the suture only being strongly 
elevated ; the basal two-thirds of the surface is scantily covered 
with granulated punctures, mostly arranged in lines, each of 
which is accompanied by a dark-brown speck ; the colour is 
ochreous brown or tawny ; the posterior part of the suture and 
the discal ridges are finely streaked with grey ; behind the 
