182 



THE PHYSIOLOGY OF INSECT SENSES 



500 



400 



500 



600 



IVave Length mu 



Fig. 89. The spectral sensitivity of the compound eye of Calliphora. Data 

 from Antrum and Stumpf (1952) (open circles), Walther and Dodt 

 (1957) (half-filled circles), and Walther and Dodt (1959) (solid circles). 

 (Drawn from Goldsmith, 1961.) 



(540 mji.), and the ultra-violet (341-369 m\i). The curve for Periplaneta 

 is similar, but lacks the peak in the red. 



A spectral sensitivity curve for the drone honeybee shows a maxi- 

 mum at 400 my. for the compound eye and maxima at 335-340 my. and 

 490 my for the median ocellus (Goldsmith, 1958 a, 1958 b; Goldsmith 

 and Ruck, 1958). The dorsal ocelli of the cockroaches Periplaneta 



