PAB Ti: 
DESCRIPTION OF GENERA AND SPECIES. 
Amona Orbitelarie I include, with Thorell, all spiders that spin a 
so called geometrical web. This may be arranged in a more or less circu- 
lar plane, perpendicular or horizontal to the horizon, as the case 
Orbitel- may be, which is the characteristic web of Epeira and many 
ae other genera. Or it may be arranged in a circular plane, which 
lacks one segment of greater or less size, usually in the upper 
part of the snare, as in the case of Zilla and some species of Epeira, Or 
again, it may consist simply of a single sector of a circle, as in the case 
of Hyptiotes, the well known Triangle spider. I include among the fami- 
lies of Orbitelarize, Uloborus, which makes a circular snare, suspended 
horizontally, but. without the usual Epeiroid armature of viscid beads upon 
the spiral lines. e 
It does not seem that any spider which spins a snare of the general 
character here described can be properly placed in any suborder other 
We than Orbitelarie. Yet it may well be that there are Orbitelarie, 
ee even Epeiroids in the strictest sense, which spin either no web 
ienhien: at all, or an irregular one; just as (to quote Thorell’s compar- 
ison) there are many Tubitelarie that do not fabricate webs of 
the form characteristic of that group.! Pachygnatha, for example, I 
include with the Orbitelarize, as is now done by the best araneologists ; 
but, so far as is known, it makes no web, and appears to live underneath 
stones and capture its prey after the fashion of the wandering spiders. 
Of course, such a conclusion as this cannot be wondered at; for no one 
will claim that a natural classification of animals can be based upon hab-. 
its alone, although in the case of spiders it certainly is true that there is 
a quite constant relation between the natural habits and the natural order 
of systematic life. 
Some of the older arachnologists still cling to the term Araneidea to 
denominate the order of true spiders; but for the most part 
Name of : : 
the Order, ‘#e word Arane is now thus used. This term was first proposed 
by Sundevall, in his Conspectus Arachnidum, in 1833, It was 
Thorell, Syn. Europ. Spid., page 599. 
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