No. i.] A STUDY OF SOME TEXAN PONERINAE. 5 



packets of eggs which they had laid. Like the pigeons among 

 birds, P. karpax lays only two eggs at a time. I infer this from 

 the fact that only two eggs are found to be mature in the 

 ovaries. Since, in addition to these facts, wingless individuals 

 actually laid eggs in my artificial nests, I feel certain that forms 



FIG. 3. Pachycondyla harpax Fabr. Worker, dorsal and lateral aspect. 



externally indistinguishable from the workers commonly func- 

 tion as females. These are, therefore, ergatoid or ergatomor- 

 phic females. There is not even a slight difference in size to 

 separate the two forms externally, since some of the ergatoid 

 females are smaller than some of the workers. There are, 

 however, in certain nests of P. harpax winged females of a less 



