OR, MANUAI, OF THB APIARY. 



181 



The bees change from worker (Fig. 78, c) to drone cells 

 (Fig. 78, a), -which are one-fifth larger, and vice versa, not by 

 any system (Fig. 78, 6), but simply by enlarging or contract- 

 ing. It usually takes about four rows to complete the transfor- 



FiG. 78. 



Mhombs, Pyramidal Bases t, 

 and cross-sections of celh. ■^^VH^^VT^^^ 

 — Illustrated. ^i?^Sv^& 



Honey-Comb. — 



a Drone-cells. 

 b Deformed cells. 



after Duncan. 



c Worker-cells. 

 dd Queen-cells. 



mation, though the number of deformed cells varies from two, 

 very rarely one, to eight. The perfect drone-cells may be, 

 often are, contiguous to perfect worker-cells, the irregular cells 

 being used to fill out the necessary irregularities. An English 



