NO. 10 



TROPISMS OF LEPIDOPTERA McINDOO 



29 



Fig. 5. — Legs, maxilla, and labial palpus of female codling moth, No. 3, show- 

 ing location and structure of sense organs on these appendages. A, Inner and 

 outer surfaces of hind leg; B, same of middle leg; and C, same of front leg, 

 showing location of olfactory pores (7 to //, c and d, and other dots), sense 

 bristles (Sea), and sense hairs (St) ; X 5- D, Maxilla or one-half of proboscis, 

 and E, labial palpus, showing location of olfactory pores (e and 12), pegs (Pg), 

 sense bristles (Sea), sense hairs (St), and labial-palpus organ (Bo); X 32. 

 F to M, Structure and comparative sizes of sense organs on proboscis ; X 500. 

 F, External view of peg; G. looking down on its tip end; H, cross section of 

 peg; and I, longitudinal section of peg. showing trichogenous cell (Tc), sense 

 cell (Se), and nerve (N). J and K, External and internal structure of smallest 

 sense hair. L, External view of sense bristle. M, External view of two olfactory 

 pores. 



