principally marine, found on the South Coast of Devonshire. 9 
latter end of May I again visited my colony, and found them 
equally plentiful and increased in size, but not one so large as the 
Cornish P. acaroides. Rather later in the year, perhaps about the 
middle of June, I found one in a different place, but under a 
slate, that was not much inferior in size to my former specimen; — 
and circumstances prevented me from visiting my colony again 
till October, when. with the utmost search not one was to be 
found. From these circumstances it may be concluded, that the 
life of this animal is extended to only six or eight months, or at 
least short of a year, for not one old or full grown one was 
to be found : it is therefore probable that the eggs are deposited 
early in the autumn, or latter end of the summer, and are 
brought to life by the first warm weather in the spring. 
Like Phalangium bimaculatum*, the P. acaroides delights in dry 
shady places amongst stones, especially slate. But aridity as 
well as much heat appears to destroy both these insects: even 
confinement in a bottle or box. is usually fatal in a few hours. 
Thus the temperature of a slate exposed to the solar rays would 
instantly destroy them, from the great absorption of heat by so 
dark a body, although an ant finds no inconvenience from such 
accumulated heat. 
I cannot conclude this subject without observing, that although 
it has been thought proper in this place to affix to the insect in 
question the titles by which it is generally known, yet it must be 
remarked that, according to the Linnean character of the genus 
Phalangium, the acaroides can have no claim to a place in that 
family : and certainly those who, like Fabricius, have considered 
it as a Scorpio, have not mended the matter, for in fact it wants 
all the essential characters of that poui the eyes on the back, 
3 Donovan British Ins, vol. v, tab. i 
P. acaroides. 
COVO SI. c the 
This i is common in similar situations wih 
