Savi’s Illustration of the History of a Species of Julus. 51 
outside the mouth laterally on the under lip. Behind the head 
is the first segment or ring, curved in the form of a saddle, broad 
above and narrow below; it is about double the size of the other 
rings, and is called the corselet; from the corselet to the extremity 
of the body there are many rings, the number of which varies ac- 
cording to the sex and age; in males the most mature there are 
about 59, in females 64; these rings are of a horny nature, clear, 
smooth and incomplete, having the figure of two flat rings or 
hoops inchased into each other, broader on the upper side and 
narrower on the under; their juncture has a button-like appear- 
ance; the breadth of each ring is about one-third its diameter ; 
the colour of these rings is black in the part superior, yellowish 
white in the.inferior, at the edges of a dirty yellow and shining 5 
the first two rings and the last three are without the button-like 
structure, to which in all the others the legs are attached; the 
sixth ring in the male is also without this kind of button, having 
in its place the organs of generation; the body of the insect is 
terminated by two kind of hemispheres which are covered with 
a yellowish down. The legs of this insect vary in number like 
the rings, and generally consist of four situated on the narrow 
part of the button; they are of a whitish yellow, diaphanous, co- 
vered with a thin down, sufficiently long, composed of six pieces 
almost equal, and termiuated by a nail of a darker colour ; their 
length is equal to two-thirds of the diameter of the insect’s 
body. The second ring in both male and female is without legs, 
and in the female between this ring and the first are situated the 
generative organs. The following is the best technical descrip- 
tion which the author can give of this insect, which is different 
from the Julus terrestris and J. sabulosus, and approaches nearer 
to the J, fuscus and J. Indus, although both the latter are Ori- 
ental animals ; hence he calls it J. communis. 
JuLus segmentis supra nigris, subtus albidis, pedibus unicolo- 
ribus albidis, antennis capiti subaeequalibus, allo-cinereis, ano 
obtuso, ultimo segmento obtusé acuminalo. 
The Professor, although he kept a number of these animals in 
his house, has never been able to observe them deposit their eggs, 
they being sterile with him; but in the body of females he ob- 
served eggs nearly mature, roundish, of adirty yellow colour, and 
the diameter of half a line; the females deposit an immense 
number of eggs in the earth, on stones or wood according to the 
nature of the places which they inhabit, the eggs occupying the 
whole length of their bodies. The youngest Julus which he has 
seen was two lines long and one-third thick, of a clear yellow, 
and semi-transparent. Immense numbers are found under rot- 
ten wood; their growth is not very rapid, increasing consecu- 
tively their rings and legs, changing successively their skins. 
D2 . This 
