NO. l8 SENSE ORGANS OF COLEOPTERA — McTNDOO 



49 



Fig. 10. — Diagrams showing portions of elytron, wing, and leg of adult beetles, 

 to illustrate internal and external anatomy of these appendages and of olfactory 

 pores and hypodermal glands. A, oblique transverse-longitudinal view of portion 

 of peduncle of Epilachna borealis. The transverse portion passes through group 

 I of the olfactory pores and radial plate {RP) in the direction of the line marked 

 X in figure 8 P>. B, transverse-longitudinal view of portion of wing of Orthosoma, 

 passing through pores on radius (R) and media (Me). C, transverse-longitu- 

 dinal view of proximal end of trochanter belonging to right hind leg of E. 

 borealis, passing through group 6 of olfactory pores (4 pores on right) and 

 group 5 (3 pores at left). Ap, jxjre aperture, Bl, Blood; Co, chitinous cone; 

 GC, hypodermal gland cell; Hr, noninnervated hair; A^, nerve; Pa, pore of 

 hypodermal gland ; SC, sense cell ; SF, sense fiber ; and Tr, trachea. 



