•228 
Ohservatioiis on the vnrioits Insects 
them eventually to me. They were of a yellow oclireous colour, 
composed of the usual number of segments (fig. 52), tapering to 
the head, and truncated at the tail, and were about two lines long 
(w). The head was furnished with two small black horny fangs 
(?/,) ; and the tail was cut off abruptly, the lower circumference 
bemg deeply indented, and forming several irregular lobes, and 
in the centre were tvv^o brown tubercles. It was destitute of feet, 
as such maggots usually are. 
The remaining animals which infest the roots of corn and other 
crops, and called also Wireworms by the farmers, belonged to the 
Class Arachnides and the Order Myriapoda. Latreille subse- 
quently altered the value of these terms, changing them to the 
Class Myriapoda, the Order Chilognath a, and the Family 
Anguiformia. Linnaius gave them the generic name of JuLUs; 
;uid from the typical species resembling snalces in miniature, 
especially the slow-worm, I have applied to them the English 
appellation of Snake-millipedes. After describing them I will 
relate their history and economy. One has been named 
16. Julus pulchellus hy Leach (the beautiful Snake-millipede). 
This species is from one- sixth to half an inch long, or upwards. 
It is slender, cylindrical, and shining (.r) ; it has about 1/0 legs; 
the horns arc clavate, pubescent, and seven-jointed, the apical 
joint being minute (y); the eyes are black, and coarsely granu- 
lated ; it is pale ochreous, with a double row of bright crimson 
spots down each side, excepting the four first and five last seg- 
ments ; the whole of them are faintly striated longitudinally with 
a rather deep incision separating the rings (fig. 03). 
After death this species Ijccomcs of a fine sanguineous purple, 
wliich will stain the paper upon which the specimens are gummed. 
Jt is, I think, the most widely spread, if not the most abundant, 
of the Snake-millipedes. It inhabits both fields and gardens, and 
has been observed feeding upon a small Helix. 
17- Julus Londinensis of Xeac/j, the London Snake-millipede, 
(fig. 54), is usually about an inch long, cylindrical, shining, and 
rather stout. It is of a dark lead-colour. The sejrments are 
longitudnially striated, the margins subferruginous ; there are two 
black dots on each, excepting the five thoracic and four apical 
ones, forming a line of pores down each side, from which an acid 
liquor flows, of a disagreeable odour, which is said to be em- 
ployed to defend itself from enemies. The legs are dirty white, 
and amount to about 160, in pairs on each side, so that each seg- 
ment seems to be provided with four legs. The head is brownish, 
and pubescent, with black granulated eyes. The antenna; are 
brown, clavate, and a little hairy. The basal joint is sub-globose; 
second elcmgatcd, and slightly exceeding the following in length ; 
the third, fourth, and fiftli are stouter, ovate-truncate, the last 
