Transactions of the Academy of Science of St. Louis 
Fig. 1. ‘st of the mining-bee, Emphor bombiformis, showing the 
turret over phic opening, and a large number of mud pellets nearby. 
Fig. 2. The completed nest of Emphor bombiformis; where the 
chimney once oad there is now a saucer-like depression 
‘ig. 3. The shed built over a thriving colony of plant lice by the 
ant, Crematogaster lineolata 
