PLATE IV. 

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



FIG. I. Liposcia dubiosa Ashm. $. 



2. Synoplus brevipennis Ashm. 9 . 



3. Praon alaskcnsis Ashm. $ . 



4. Aphidius frigidus Ashm. 9 



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