262 
Mr. H. W. Bates on Ceramhycidce 
Genus Chlorida. 
Serville, Ann. Soc. Ent. Fr. 1834^ p. 31; Lacord. Gen. 
viii. 289. 
1. Chlorida f estiva. 
Ceramhyx festivusj Lin. Syst. -N^at. ii. 623. 
This common and well-known tropical American insect 
is generally distributed throughout the Amazons region. 
I found it frequently at nighty especially at sugaT smeared 
on palings to attract moths. 
2. ChloHda curta. 
Thomson, Archives Entomologiques, i. 288. 
Similar to Chi. f estiva; but different in the markings 
of the thorax, and in the distinct sharply- elevated costse 
of the elytra, especially the lateral one, which extends 
from the humeral callus to near the apex, where it joins 
the two inner ribs. The antennae are black, with the basal 
joint red. The upper surface of the head is black. The 
thorax is dark red, with a very broad vitta on each side, 
and a central spot or stripe, very much wider on the fore 
margin than on the hind, black; the surface of the thorax 
is uneven and coarsely sculptured, as in Chi. f estiva. 
The elytra are somewhat shorter relatively than in Chi. 
f estiva, and besides the strong elevation of the ribs, offer 
a differential character in the thick punctuation of all the 
basal portion. Body beneath and legs red. 
Long. 10 lin. 9 . 
The species offers a very remarkable feature, unnoticed 
by its original describer, in the apex of the abdomen 
(in the ? at least) being greatly dilated and swollen ; 
the edge of the last ventral segment is straightly trun- 
cate, but the pygidium, or last dorsal segment, is rounded, 
slightly sinuate in the middle and on each side. This 
feature forms the chief character of Lacordaire^s Groupe 
Torneutides and it is a further instance of the insta- 
bility of diagnostic characters in the Longicor7iia, that an 
isolated member of a distinct group should show it in so 
high a degree of development. 
Ilab. — Ega. 
