SUPPLEMENT 
ON THE 
TRACHEAN ARACHNIDA. 
The genus Gale odes of the first family of this order was 
established by Olivier, in 1791, in the “ Encyclopedic Metlio - 
clique” under this denomination, as well as in almost all the 
works of the French naturalists. But Fabricius has preserved 
that of Solpuga , which was bestowed upon this genus a few 
years after by Lichtenstein. Respecting the general cha- 
racters of these arachnida, it may be necessary to enlarge a 
little on the text. The body is oblong, and annulated ; the 
anterior segment is much the larger, and supports two very 
strong projecting and compressed mandibles, terminating in a 
denticulated forceps, the lower branch of which is mobile. 
There are two simple eyes, which are dorsal, and approxi- 
mated to each other on a common tubercle ; and two large 
filiform palpi, without any terminal hook. The first feet 
are also filiform, imperfect, and in the form of palpi. The 
mouth is composed of two sciatic jaws, formed each by the 
union of the base of one of these palpi, and one of the anterior 
feet, and of a sternal subulate ligula, situated between the 
mandibles. There are six other filiform feet, terminated each 
by two species of long mobile digits, w T ith a little hook at the 
