INTRODUCTION. 



terminology used in the present work in tbe descriptions of 

 genera and species. 



Fig. 1. — Body seen from above. 



A. Head. a. Antennae 



B. Pronotum. a'. Eyes. 



C. Scutellum. b. Anterior prouotal 



D. Corium. angles. 



E. Membrane. h' . Lateral or posterior 



F. Connexivuni. pronotal angles. 



d. Clavus. 



1. Anterior legs. 



w. Intermediate legs. 



3. Posterior legs. 



A. Prosternum. 



B. Mesosternum. 

 0. Metasternum. 



Fig. 2. — Body as seen from beneath. 



These three segments together constitute the sternum, 

 and the sides of the sternum are known as the 

 1 pleura ; the sockets into which the legs articulate 

 [ are called the acetabula. 

 D. Abdomen, exhibiting six segments (1-6) and anal appendages (7). 

 a. Rostrum. b. Mesosternal ridge or carina. 



a'. Anterior coxa. c. Metasterual plate. 



a^. Intermediate coxae. c'. Odoriferous aperture. 



n^. Posterior coxae. 



