166 Beekeeping 



Sight. 



The organs which receive light stimuli are the three simple 

 eyes or ocelli (0) and the two large compound eyes (E), all 

 situated on the head. The compound eyes are located on 



inner ch. 



FIG. 86. Section of compound eye and optic lobe of worker; Om, 



ommatidia. 



the sides of the head, each eye consisting of many units. In 

 drones, the number of these units is larger than in the two 

 types of females and the compound eyes are so enlarged as to 

 meet on the vertex of the head. The structure of the units 

 of the compound eye was described some years ago. 1 On 



1 Phillips, E. F., 1905. Structure and development of the compound 

 eye of the honey bee. Proc. acad. nat. sci. Phila., LVII, pp. 123-157. 



