Changes in Orb Webs of Spiders During Growth (Araneus Diadematus Clerck and Neoscona Vertebrata Mc Cook) 1)2)

CHANGES IN ORB WEBS OF SPIDERS DURING GROWTH (ARANEUS DIADEMATUS CLERCK AND NEOSCONA VERTEBRATA Mc COOK) 1)2) by PETER N. WITT and RICARDA BAUM Dept. of Pharmacology, State University of New York, Upstate Medical Center, Syracuse, N. Y.) (With 5 Figures) (Rec. 26-IV-1960) The web-building pattern of orb webs is characteristic for each species of spider, but within the same species there is considerable variation from one web to another. In working with orb-webs for many years it became apparent that each age group of spiders had its characteristic webs. We were finally able to tell the approximate age of