186 BARON WALCKENAER ON THE INSECTS 
and says that it is smaller than the Centipede, and moves without making 
sinuosities. Errors of this sort are common in this author. 
Numenius, cited by Athenzeus, calls the Julios the entrails of the earth. 
Eustathius, commenting upon this passage, and Theon, a more ancient 
author, give different reasons for this expression. 
Hesychius says that the Jowlos is like the Polypus, that it lives in 
moist places, and that it is different from the Onos or Asellus. 
Lycophron applies the epithet of Juliopezos to a vessel propelled by 
a great number of oars. 
From all these texts we gather the following particulars: that the 
Julos or Julus was an apterous insect, or without wings, and furnished 
with a great number of legs; that it rolls itself up immediately upon being 
touched ; that it deseribes a curve or sinuosities in moving; that it con- 
ceals itself in the earth ; that it is found in moist places; and lastly, that 
Suidas alone informs us that this insect preys upon the vine. 
XIII. Biurus.—We now arrive at names applied by the Romans to in- 
sects destructive to the vine, and we shall commence with a word which, 
from its etymology, appears to have been derived from the Greek. 
The name of Biurus employed by Cicero to denote an insect injurious 
to the vine is only known to us from a passage of Pliny the naturalist. 
Speaking of different medical prescriptions, and several curious parti- 
culars relative to the history of animals, he concludes a chapter with 
these words: “ Marcus Cicero says that there are insects, named Biuri, 
which prey upon the vines in Campania.” “ MM. Cicero tradit animalia 
Biuros vocari qui vites in Campania erodant.” 
It has been rightly remarked that this word is derived from the 
Greek owra, and appears to be a synonym of Bicaudes, insects with 
a double tail. This etymology deserves attention, as we learn from it 
the only peculiarity by which this insect can be recognised. In the 
most ancient manuscripts the word is written Biwros, and we should 
reject the orthography of Byéuros adopted by certain editors of Pliny. 
This latter word has been employed by modern naturalists as the 
name of a genus of Dermestes*, while they have neglected the true 
orthography. 
XIV. Involvolus, Involvulus, or Involvus.—The words which remain 
to be noticed are purely Latin; they have, if I may be allowed the ex- 
pression, a family likeness, and appear to be derived from each other. 
We shall commence with the word which the most ancient author 
has employed, and which is that which has given occasion to this 
memoir. 
Involvolus or Involvulus oecurs in Plautus. 
In the Cistilliarius, act 1, scene 2, verses 455-458, the slave Lampa- 
* See Latreille, in Cuvier’s Réqne Animal, vol. iv. p. 506. edit. of 1829.] 
