350 AMERICAN SPIDERS AND THEIR SPINNINGWORK. 
some cases, as in the web of a species of Dictyna which abounds in Phila- 
delphia and vicinity, and everywhere spins upon our walls and fences, this 
peculiar snare takes upon it, in a rude way, the outlines (Fig. 343) and even 
in greater detail the general form of an orb, as may be seen by consulting 
Fig. 344. In other words, this wall loving spider starts from its little tubu- 
lar nesting place and drags its lines out to surrounding adjacent points. 
Between these lines it then extends its flocculent thread, carrying it down- 
ward to the circumference and backwards again towards the centre, and 
so back and forth, until, as we have said, the rude outline of an orbweb 
is formed, 
Now, it is of interest to know that among the Orbweavers we have two 
well defined families who are provided with the calamistrum and cribellum, 
and spin the same kind of a thread as that just described. 
Orb- _. Hyptiotes, or the Triangle spider, makes a web whose four di- 
bach verging lines, with their interlacing flocculent spiral, might very 
urled 2 : 
Spirals. Well be represented by a section taken from the web of Clubiona 
or Dictyna. We are not able to trace a close relation between 
these two families, along any structural lines (apart from the cribellum 
and calamistrum), but the relation between their spinningwork is very ap- 
parent. 
Yet, further, we have, among the Orbweavers the family Uloborine, 
whose species construct an exact orbicular snare, in every essential respect 
resembling the snare of such Orbweavers as the Orchard spider (Argyro- 
epeira hortorum) or the Extended spider (Tetragnatha extensa), except 
that the spirals have the teased or flocculent characteristic of Clubiona, 
instead of the viscid beaded armature common with Orbweaving species. 
Thus our sectoral snare of Hyptiotes with its flocculent spiral lines has 
become a complete orb; or, in other words, the circular sector appears as 
a full circle, retaining its flocculent interradials. 
It is interesting here to note, that while the Triangle spider, on the 
one hand, is connected with the Tubeweayers by this peculiar flocculent 
thread, and, on the other hand with the species that spin full 
The Ray orbs by the same characteristic thread, it is connected with the 
eee Orbitelarize at another point by the interesting species known as 
the Ray spider. That is to say, the Ray spider has the viscid 
armature common to the Epeiroids, and its snare is arranged in orbicular 
form, like that of Uloborus and other Orbweavers. But, strangely, the 
various sectors of the circle are so combined that they can be managed 
wholly or in part in the same peculiar manner which characterizes the 
Triangle spider. That is to say, the trapline is held with a coil of slack 
thread above the two hind feet, and the various sectors of the circular 
webs are snapped off separately or unitedly by the same spring movement 
that marks Hyptiotes, and which is fully described in Chapters XII. and 
XIII. 
