CONTENTS OF VOLUME XI. 



No. 1. — The Biology and Ecology of Aquatic and Semiaquatic Hemiptera. 



Plates I "to XXX. By H. B. Hunger ford 3 



Xo. 2. — The Male Genitalia as Characters of Specific Value in Certain 

 Cryptocerata (Hemiptera-Heteroptera). Plates XXXI to 

 XXXII. By H.B. Hunger jord 329 



