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NEST MAKING: ITS ORIGIN AND USE. 323 
belongs to the Territelariee, and appears to be nearly related to Atypus 
and Nemesia. Mr. Moggridge classifies its nest among those of the Trap- 
door spiders, characterizing it as the funnel shaped nest.! 
Among the Citigrades we find a resemblance in general habit to the 
Tunnelweavers. The burrowing habit is quite identical, and the tube 
making habit, although not so high- 
ly specialized, nevertheless exists. It 
is chiefly displayed, how- 
ever, in spinning a tubu- 
lar lining to the little tower 
prolonged above the burrow, as in 
the case of the interesting nest of 
the turret spider,? Fig. 289, or the 
silk lined, dome shaped vestibule of 
the Tiger spider,? composed of moss 
or various scraps of miscellaneous 
material, which is wrought into an 
entrance to the sloping burrow that 
extends beneath the surface of the ground. (Fig. 305.) The silk lined 
tower of the turret spider may be said to resemble very closely the tubu- 
lar nest of such Orbweavers as Epeira domiciliorum and E. thaddeus, 
when they build within the leaves of a pine tree or weave their tent in 
like situations. The silk lined vestibule of the Tiger spider is not unlike 
the leafy nest constructed by the Shamrock spider and others of the group 
Citi- 
grades. 
FiG. 305. Vestibule of Lycosa tigrina (McCook). 
- to which she belongs. (Compare Fig. 259, Chapter XVII., with Fig. 305.) 
Coming finally to the Laterigrades we find here the nest making habit 
less developed than in any other tribe of the order. These araneads stalk 
their prey afield; use no sort of spinningwork for their 
a& ‘4 capture; and, as far as I know, make no fixed domicile 
8 b ees of spinningwork for their permanent abode. I 
ape have, however, found Laterigrades, as Philo- 
dromus and Misumena, dwelling with their co- 
coons beneath tubular structures of delicate texture, which 
E served both as a cover to the spider and her cocoon. In 
Fic, 306. Outline nest S = . “ . 
of Lycosa tigrina. s, form and spinningwork these differed in no essential par- 
Frrmace of ground ticular from the tubes of Drassids and Epeira and the 
is indicated beneath; cocooning tents of Orbweavers. This, I believe, is a 
a, b,c, d, the vestibule : C _ " - . 1 
cPonneettatren, COMMON habit, particularly with the mother Laterigrade 
at the cocooning period. So far, then, as she may be 
said to possess in any degree the instinct of nest building, she displays 
a tendency to adopt the typical form, and screens herself within a tube. 
* Moggridge: Harvesting Ants and Trapdoor Spiders, page 183, pl. 13. 
* Tarentula arenicola Scudder, * Tarentula tigrina McCook. 
