10 Annals Entomological Society of America [Vol. V, 
old viscid line is removed, the radii and the guy line remaining 
intact. 
An old female Nephila which I watched for a number of 
days at Miami, Florida, carried her economy in the use of silk 
a step farther. This individual removed the viscid thread of 
only one half of the web each night, repairing alternate halves 
on alternate nights. 
During the period that this spider was under observation 
there was a very severe storm, five inches of rain falling in the 
course of a few hours. When the web was visited on the follow- 
ing morning it was found that it had been repaired throughout. 
The steps in the perfecting of the webs of spiders briefly 
sketched in the preceding pages can be indicated in a tabular 
form as follows: 
WEBS OF SPIDERS. 
A. Webs made by spiders that use only dry silk. 
By nlrresularcwebssccioxte sae Sete ene tae eee circa ok keene eae Phoicide 
BB. Regular webs. 
Cy" Whersheetewebsi nie eiss ec ee eae ise oe nee Linyphiide 
CCy. The funnel-webswic ao. .ah ice eee aerents cite Seis eee Agelenide 
AA. Webs made by spiders that use both dry and viscid silk. 
B. Webs consisting only of dry silk; the viscid silk being flung 
Upon the prey seul ae eee ee Oe eee eles See Sen ee Theridiide 
BB. Webs consisting of both dry and viscid silk. 
C. Webs consisting of a comparatively generalized foundation 
of dry silk and a highly specialized band supporting the 
viscid silk. 
D. Warp of hackled band consisting of two straight 
and two curled threads. 
E. Foundation of web irregular............ Dictynide 
EE. Foundation of web regular..........Hypochilide 
DD. Warp of hackled band consisting of four curled 
threads and a) supporting conde sear Filistatide 
CC. Webs consisting of a highly specialized foundation and a 
comparatively generalized viscid thread or band. 
D. Webs containing a hackled band.............. Uloboridz 
DD. WVascidisillenotihackled aan eer ee Argiopidz 
E. Radii and spiral guy line temporary......... 
Most orb-weavers 
EE. Radii and spiral guy line permanent..... Nephila. 
