352 



AMERICAN HYMENOPTERA. 



Variation. — This species is somewhat variable, not only 

 in color, but also in the character of the pile and the length 

 of the malar space of the queen. The following table will 

 show the variation in the length of the malar space, as com- 

 pared with the width of the eye, of the queen, the measure- 

 ments having been made with a Filar micrometer : 



Specimens. 



1. 



2. 



3. 



4. 



5. 



6. 



7. 



8. 



9. 

 10. 

 11. 

 12. 

 13. 

 14. 

 15. 

 16. 

 17. 

 18. 

 19. 

 20. 

 21. 

 22. 

 23. 

 24. 

 25. 

 26. 

 27. 

 28. 

 29. 

 30. 

 31. 

 32. 

 33. 

 34. 

 35. 

 36. 

 37. 

 38. 

 39. 

 40. 



It will be noticed that the variation between the two ex- 

 tremes is quite constant, except for a break between speci- 



i 



