NOTES ON HYMENOPTERA. 137 



In 1864, I collected a large number of the larvos of Erio- 

 campa, and in the spring of the following year bred as many 

 as fifty flies, but all proved to be females. How true indeed 

 are the words of the wisest of Israel's kings, " Hardly do rce 

 guess aright at things that are upon earth, and with labour 

 do we find the things that are before us," 



