in] FOSSORES OR DIGGER-WASPS 



29 



parallel with it is the post-costal nervure : both 

 these nervures end in a dark thickening, known as 

 the stigma, situated on the front margin at about 



to 



'5 



Fig. 4. On left, wings of a Hymeuopteron showing the full arrange- 

 ment of nervures and cells. On right, wings of a Crabro (both 

 much enlarged). 



Anterior wing : 



1. Costal nervure. 



3. Median ,, 



5. Stigma. 



7. Upper basal nervure. 



9. Cubital 



11. 1st recurrent ,, 



I. Upper basal cell. 



IIL Marginal 



V. 2nd submarginal cell. 



VII. 1st discoidal ,, 



IX. 2nd discoidal ,, 



XI. 2nd apical J 



Posterior wing : 



13. Anterior nervure. 

 15. Posterior 



2. Post-costal nervure. 



4. Posterior ,, 



(j. Marginal ,, 



8. Lower basal ,, 



10. Submarginal nervures. 

 12. 2nd recurrent nervure. 



11. Lower basal cell. 

 IV. 1st submarginal cell. 

 VI. 3rd 



VIII. 3rd discoidal 



X. 1st apical ,, 



14. Median nervure. 



