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POPULAR SCIENCE REVIEW. 
it differs somewhat in its economy. In summer the female 
attaches to objects near her snare a subglobose cocoon of white 
silk, of a loose texture, measuring half of an inch in diameter, 
in which she deposits upwards of two hundred eggs, of a 
yellow colour, agglutinated together in a lenticular form. 
This spider spins an extensive snare with an open circular 
space at the centre, which it usually occupies when watching 
for its prey ; from this station it drops quickly on being dis- 
turbed, regaining it, when the danger is past, by means of a 
line drawn from the spinners in its descent, and previously 
attached to the circumvolution of the unadhesive line bounding 
the central aperture. 
When immature, Fjoeira antriada is subject to be preyed 
upon (like Linyjohia minuta) by the larva of Polysphincta 
carbonaria . 
TRIBE SENOCU LI N A. 
Family Scytodidce. 
Scytodes thoracica , our only indigenous species of the genus 
Scytodes , is of very rare occurrence in Britain. It is slow in 
its movements, and spins in the corners of rooms a few fine 
lines attached to each other without any apparent order. Ac- 
cording to M. Lucas, it constructs a globular cocoon of white 
silk, of a compact texture, in which it deposits nine eggs, of a 
yellowish- white colour; whereas M. Walckenaer states that 
the cocoon is of a loose texture and comprises about thirty 
eggs. The female manifests a strong attachment to her cocoon, 
supporting it under her sternum by means of the falces and 
palpi, and conveying it with her wherever she moves. 
Various species of spiders, on the approach of winter, seek a 
refuge from the decreasing temperature of the atmosphere in 
the interior of houses ; but these should not be confounded 
with such as, in the exercise of the instinctive propensities 
and physical powers with which they are respectively 
endowed, habitually pass their lives therein. Care must 
be taken, also, not to employ the term house spiders in too 
unqualified a sense, as the haunts of those species to which it 
may be deemed most applicable (not excepting even Tegenaria 
civilis) are by no means restricted solely to buildings, but are 
considerably diversified. 
