414 DWIGHT E. MINNICH 



Phillips, E. F., and Dbmuth, G. S. 1914 The temperature of the honey bee 



cluster in winter. Bull. U. S. Dept. Agriculture, no. 93, 16 pp. 

 Plateau, F. 1887 Reoherches exp6rimentelles sur la vision chez les arthro- 



podes. Ire partie. Bruxelles. 44 pp. 

 PoxJCHBT, G. 1872 De I'influence de la lumifere sur les larves diptferes priv6e& 



d'organs ext^rieurs de la vision. Rev. et Mag. de Zool., s6t. 2, t. 23, 



pp. 110-117, 129-138, 183-186, 225-231, 261-264, 312-316. 

 RXdl, E. 1901 Untersuchungen iiber die Lichtreactionen der Arthropoden. 



Arch. f. d. ges. Physiol., Bd. 87, S. 418-466. 



1903 Untersuchungen iiber den Phototropismus der Tiere. Leipzig. 



viii + 188 pp. 

 Stockakd, C. R. 1908 Habits, reactions, and mating instincts of the 'walking 



stick,' Aplopus Mayeri. Papers from theTortugas Laboratory of the 



Carnegie Institution of Washington, vol. 2, pp. 45-49. 

 Tkevirantjs, G. R. 1832 Die Erscheinungen und Gesetze des organischen 



Lebens. Bd. 2, Abt. 1. Bremen. 234 pp. 

 Turner, G. H. 1912 The reactions of the mason wasp, Trypoxylon albotarsus 



to light. Jour. Animal Behavior, vol. 2, pp. 353-362. 

 Wai/ter, H. E. 1907 The reactions of planarians to light. Jour. Exp. Zool., 



vol. 5, pp. 35-162. 



