of two new Coleopterous Insects. 229 
This beautiful insect Sir P. Walker has some reasons for be- 
lieving is from Caraccas ; he is however not sure of this being the 
true habitat. 
The head and antennas are black ; the former is punctured, and 
has a longitudinal groove between the eyes ; the thorax is also 
black ; but on either side is a large somewhat irregular red patch, 
and in front of this is a small spot of the same colour ; a small 
red spot is also observable on either side of the prosternum, near 
the base of the legs ; the sides of the thorax are produced in the 
middle into an obtuse angle, and it has a transverse indentation 
behind. The seutellum is of moderate size, of an elongate triangular 
form, black, obscurely tinted with green, and slightly concave. 
The elytra are of a most brilliant glossy green colour, and very 
finely punctured ; on the anterior half are some delicate rugae. 
The mesosternum is black ; the metasternum red, and darkly 
tinted on the fore part and sides ; the segments of the abdomen 
are also reddish, but are edged with blackish ; the tibiae, tarsi, 
coxae, and basal and apical portions of the femora, are black ; the 
remaining portion of each femur is red. 
XL VI. On the Use of the Antennoe of Insects. By George 
Newport, Member of the Royal College of Surgeons , 
and V. P. of the Entomologiccd Society of London. 
[Read 1st January, 1838.] 
Most of the following remarks on the use of the Antennae were 
prepared for publication in the summer of 1831, and transmitted 
at that time to the editor of one of the monthly journals, — the 
Magazine of Natural History, — but from an accidental circum- 
stance were not published. Since that period some of the views 
here adduced have been advocated by other naturalists. The 
author, therefore, does not now present them to the Society as 
entirely novel, but only as being a summary of facts (many of 
which fell under his own observation) that tend to indicate the 
true use of these organs. 
There are no parts in an insect which are perhaps less under- 
stood, or have given rise to more controversy, than the Antennae. 
From their being immediately connected with the head, and largely 
