PLATE IV. 

 [Proc. Wash. Acad. Sci., Vol. IV, PI. XI.] 



FlG. I. Liposcia dubiosa Ashm. $. 



2. Synoplus brevipennis Ashm. 



3. Praon alaskensis Ashm. $ . 



4. Aphidius frigidus Ashm. J . 

 [268] 



