SATYE. 
by Mr. Pritchard in the Microscopic Cabinet. The real length of 
the creature, measured from the extremity of the antennae to 
that of the tail, was eight-tenths of an inch. It is repre¬ 
sented in the figure, as seen in profile, the breadth of the head 
and other parts being necessarily foreshortened. 
A system of tracheae, with numerous ramifications, passes along 
each side of the body from the head to the tail, one of which is- 
seen in the figure. These respiratory apparatus ramify in a 
beautiful manner in the triple branches of the tail, each of which 
receives a branch from each trachea. 
During its growth the larva casts its skin several times, and 
the skin which it thus throws off, being translucent, is an inter¬ 
esting and beautiful microscopic object. 
The eyes as well in the larva as in the perfect insect are very 
salient, and from their magnitude and structure form interesting- 
microscopic objects. Like those of some other insects described 
in a former Tract,* they consist of a multitude of distinct organs 
of vision, each of which is an hexagonal lens. It was observed 
by Latreille, that their number increased in proportion to the 
voracity of the insect. Leuwenhoeck counted 12000 in a single 
insect. Each hexagon is a convergent lens, which may be 
converted into a microscope. Each of these lenses is found 
to produce an inverted image of an object to which it is- 
presented. 
3. The object shown in fig. 3, engraved from a drawing by Dr. 
Goring, and described in the Fig 3> 
Microscopic Cabinet by Mr. 
Pritchard, belongs to the class 
of animalcules denominated 
by Muller monoculi, from the 
circumstance of their having 
a single organ of vision, a y 
placed in the centre of the 
front of the head. This 
specimen is called the satyr, 
and is the amymone satyr of 
Muller. The figure represents 
a magnified view of the full- 
grown insect, seen at the in¬ 
ferior surface of its body as 
it presents itself to the observer, attached to the inner surface of a 
vase of water in which it moves. The real length of the animalcule 
here represented was the 120th of an inch. When they are 
Microscopic Drawing and Engraving,” p. 50 . 
n 
