THE 



KANSAS UNIVERSITY 

 SCIENCE BULLETIN 



Vol. XI— DECEMBER, 1919. 



("V^Tiole Series, Vol. XXI, No. 17.) 



ENTOMOLOGY NUMBER. 



CONTENTS: 



The Biology and Ecx)logy of Aquatic and Semiaquatic Hemiptera, 



H. B. Hungerford. 

 The Male Genitalia as Characters of Specific Value in Certain 



Cryptocerata (Hemiptera-Heteroptera), H. B. Hungerford. 



PUBLISHED BY THE UNIVERSITY 



LAWRENCE, KAN. 



Entered at the post office in Lawrence as second-class matter. 



8-1669 



