66 
Psyche 
[March 
wings were noted (textfigure) . The thorax of the true 
worker (Fig. C) is one of the most specialized found among 
the ants. The mesonotum is reduced in size and the sclerites 
Fig. 1. A, Queen of P. calif ornicus with wings removed ; B and C, 
pseudogynes of P. calif ornicus; ~D, worker of P. calif ornicus. 
have fused together, except the lateral region of the pro- 
notum with the mesopleuron. 
In order to comprehend the significance of this series, 
it is necessary to consider the manner in which a wing 
