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JOHN L. PRICER. 



size, yet this per cent, varied within a narrow range for the dif- 

 ferent colonies. The fact that none of the largest size appeared 

 in the one and two year old colonies cannot be merely accidental, 

 for if all these colonies represented in the tables were taken 

 together they would form a large colony, and yet not a single 

 individual of size No. 1 would be found among them, while in 

 the largest colony of Table V. there were yy of this size. 



Table V. 



C. pennsylvanicus . 



C. ferrugineiis. 



We may then consider it fairly well established that none of 

 the largest workers are produced during the first two years of 

 the colony's life, and that the sexually perfect forms are not pro- 

 duced until the colony is at least four or more years old. If it 

 is true that the male forms usually arise from eggs laid by workers, 

 we may add to the above that egg-laying workers do not appear 

 until just preceding the production of winged queens. We then 

 have a rather gradual increase in perfection from the smallest 

 worker produced by the queen the season of her marriage flight 

 to larger workers, then to egg-laying workers and finally to per- 

 fect winged females, and if the queen lives throughout this period, 

 and it is altogether likely that she does, the eggs that produce 

 these various forms are all laid by the same queen. An expla- 



