48 SIXTEENTH REPORT. 



It is unfortunately too early at the time of writing to determine the sex 

 of the parthenogenetically produced larvae of these experiments. 



LITERATURE CITED. 



Shull, A. F. 1914 Biology of the Thysanoptera. II. Sex and the Life 

 Cycle. Amer. Nat., vol. 48, April, pp. 236-247. 



Shull, A. F. 1909 Some Apparently New Thysanoptera from Michigan. 

 Ent. News, May, pp. 220-228. 



