86 SMITHSONIAN MISCELLANEOUS COLLECTIONS [VOL. 50 



Plate VII 

 Figures 1-9. ' 

 All the figures are surface views. 



1. Hind wing of Bombus terrestris L Magnified 9 



2. Distal hooks of Proctotrupes gravidator L, 56 



3. Hind wing of Rhyssa persuasoria L 9 



4. Distal hooks of Tenthredopsis thomsini Knw 50 



5. Distal hooks of Dryophanta folii Forst 130 



6. Distal hooks of Anomalon flavifrons D. T 50 



7. Distal hooks of Lasius ilavus Mayr 56 



8. Distal hooks of Dacnusa petiolata Hal 85 



9. Distal hooks of Vespa vulgaris L 50 



Plate VIII 

 Figures 10-18 

 All the figures are surface views. 



10. Distal hooks of Polistes galleca Latr Magnified 58 



11. Distal hooks of Eucera longicornis Scop 45 



12. Distal hooks of Anthrena ovina Klug 40 



13. Distal hooks of Halictus calceatus D. T 70 



shows the peculiar arrangement of the distal hooks in groups. 



14. Subbasal hooks of Halictus levigatus Lep 70 



15. Subbasal hooks of Pamphilius hypertrophicus D. T 70 



16. Subbasal hooks of Henicospilus ramidulus Steph 70 



17. Subbasal hooks of Holopyga amoenula Dahlb 75 



18. Subbasal hooks of Sirex. gigas L 35 



Plate IX 



Figures 19-26 



All the figures represent cross-sections through the two wings joined to- 

 gether. The region of the sections is approximately indicated in pi. vn, fig. 1, 

 by vertical lines. 



19. Sirex gigas L Magnified 50 



20. Exetastes fornicator Grav 75 



21. Formica rufa L 140 



22. Vespa vulgaris L 130 



23. Vespa crabro L " 75 



24. Apis melliiica L 140 



25. Xylocopa violacea Pr 45 



26. Vespa vulgaris L 135 



