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SUPPLEMENT 
is more obscure. Butin the southern part of Spain, a species 
has been found as large as the araneoides. 
The Solpuga fatalis of Herbst, a native of Bengal, should, 
according to this author, be distinguished from its congeners 
by its forceps being horizontal. But the question is, 
whether this position be natural and constant, and not the 
result of some forced change. 
The Greeks anciently employed in the composition of the 
medical substance called theriaca , a species of phalangium. 
It was the same solpuga , according to the opinion of the 
naturalist just quoted. 
The genus Chelifer is the phalangium of Linnaeus, the 
scorpio of Fabricius, and the obisium of Illiger. 
The most known species of this genus, the Ch. cancroides , 
or scorpion araignee of Geoffroy, faux scorpion d? Europe of 
Degeer, was at first placed by Linnaeus with acarus . He 
afterwards united it to phalangium , with which it has but a 
very trifling resemblance. Geoffroy, with reason, has made a 
genus proper of it, which he has named chelifer , in French 
pince ; but he has placed in the same genus the acarus l-ongi - 
cornis, an arachnid of quite another family. The Ch. can- 
croides , with Fabricius, is a species of scorpion , and these 
animals are in fact very nearly related. The cheliferi, how- 
ever, differ from the scorpions by their body not being ter- 
minated by a tail, by having but two or four simple eyes, and 
by being destitute of those pectinated laminae called combs , 
which are exhibited by these latter arachnida. The younger 
Hermann, in his excellent work on the apterous insects of 
Linnaeus, has adopted the genus chelifer of Geoffroy, and 
has made known several species, which he has separated into 
two divisions, founded on new and acute observations. He 
has made of the acarus longicornis of Linnaeus, and of some 
other analogous arachnida, a genus proper, scirus , but which 
had been previously established by M. Latreille. 
