326 WILLIAM MORTON BARROWS. 



5. The sense organs used in detecting the stimulus are probably 

 sense hairs on the tarsi. 



6. This orb-weaving spider provides itself with a temporary 

 extension of its tactile sense organs which makes its tactile sense 

 in reality a distance receptor, much like an auditory or an ol- 

 factory organ. 



BIBLIOGRAPHY. 

 Barrows, W. M. 



'07 The Reactions of the Pomace Fly; Drosophila ampelophila Loew, to 



Odorous Substances. Jour. Exp. Zool., Vol. IV., No. 4, p. 515-53?- 

 Boys, C. V. 



'80 The influence of a Tuning Fork on the Garden Spider. Nature, Vol. 23 



p. 149. 

 Comstock, J. H. 



'12 The Spider Book. Garden City, N. Y. 

 Dahl, T. 



'83 Ueber die Horharre bei den Arachniden. Zool. Anz., VI. 

 Davenport, C. B. 



'08 Experimental Morphology, New York. 

 McCook, H. C. 



'90 American Spiders and their Spinning Work. Vol. II. Philadelphia. 

 Mclndoo, N. E. 



'n The Lyriform Organs and Tactile Hairs of Araneads. Proc. Acad. Nat. Sci. 



Phil., May, 1911. 

 Packard, A. S. 



'03 A Text-book of Entomology, New York. 

 Peckham, G. W. and E. G. 



'87 Some Observations on the Mental Powers of Spiders. Jr. Morph., I., pp 



383-4I9- 

 Verworn, M. 



'99 General Physiology. Trans, by F. S. Lee. London, 8vo. xvi+6ispp. 



