NO. 2095. TUB BE Ado's! ID HUR FAMILY OPIINAE—GAHAN. 95 



EXPLANATION OF PLATES. 



The drawings on Plate 34 are by Mr. W. R. Walton of the Bureau of Entomology. 

 The wing figures on Plate 35 are from photographs by the writer. These photographs 

 are not all on exactly the same scale. They are intended primarily to illustrate 

 differences in wing venation. 



Plate 34. 



Fig. 1. Gnamptodon nepticulae. Dorsal view of the abdomen. 



2. Opius vierecki. Front view of the head. 



3. Opius crassiceps. View of the head from above. 



4. Opius mandihularis . (a) Front view of the head. (6) Left mandible. 



5. Allobracon pilosipes. (a) Front view of the head. (6) Dorsal view of the first 



abdominal segment. 



Plate 35. 



. Fig. 



1. Opius sanguineus, (a) Anterior wing, (b) Posterior wing. 



2. Opius crassiceps. Anterior wing. 



3. Opius foveolatus. Anterior wing. 



4. Opius anastrephae. Anterior wing. 



5. Opius politus. Anterior wing. 



6. Opius anthomyiae. Anterior wing. 



7. Opius foersteri. Anterior wins;. 



Opius foersteri. Anterior wing 

 Opius apicalis. Anterior wing 



9. Opius mandihularis. Anterior wing. 



10. Opius oscinidis. Anterior wing. 



11. Opius dimidiatus. Anterior wing. 



12. Opius striativentris . Anterior wing. 



13. Gnamptodon nepticulae. Anterior wing. 



¥ 



