THE LIFE HISTORY OF HUMAN LICE 311 



less of it, and that may be a positive reaction to the heat radiation from 

 the hand rather than an odor reaction. 



REFERENCES 



Hase, A., 1915. — Beitrage zu einer Biologie der Kleiderlaus. Zeitschr. f. 



angelwandte Entomol., Band. 2, Heft 2, pp. 265-359, 47 figs. 

 Hase, A., 1915. — Weitere Beobachtungen iiber die Laiiseplage. Centralb. 



f. Bakteriol. Parasitenk u. Infektionskr., 1 Abt., Orig., Band. 77, pp. 



153-163. 

 Hase, A., 1916. — Ueber die Entwickelungstadien der Eier und ueber die 



Larven der Kleiderlaus. Naturw. Wochenschr., Band. 31, pp. 1 et seq. 



(inaccessible). 

 Nuttall, G. H. F., 1917. — Studies on Pediculus. Parasitology, vol. 9, pp. 



293-324, 2 pi., 12 text figures. 

 Nuttall, G. H. F., 1917b.— Parasitology, vol. 10, No. 1, pp. 1-183. Sev- 

 eral articles including complete bibliography. 

 Nuttall, G. H. F., 1918.— Parasitology, vol. 10, No. 3, pp. 375-405,, 



figs. 1-5. 



