I <30 
Psyche 
[March-June 
Turnbull, A. L. 
1965. Effects of prey abundance on the development of the spider 
Agelenopsis potteri (Blackwell) (Araneae: Agelenidae). Canad. 
Ent. 97: 141-147. 
Winer, B. J. 
1962. Statistical Principles in Experimental Design. McGraw-Hill, 
N.Y. pp. 606-615. 
Witt, P. N. 
1963. Environment in relation to behavior of spiders. Arch. Environ. 
Health, 7 : 4-12. 
1971. Instructions for working with web-building spiders in the lab- 
oratory. BioScience, 21: 23-25. 
Witt, P. N. and Ricarda Baum 
1960. Changes in orb webs of spiders during growth. Behavior, 16: 
309-318. 
Witt, P. N., J. O. Rawlings and C. F. Reed 
1972. Ontogeny of web-building behavior in two orb-weaving spiders. 
Am. Zoologist, 12: 445-454. 
Witt, P. N., C. F. Reed and D. B. Peakall 
1968. A Spider’s Web. Springer Verlag, Berlin. 
