NO. 18 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 borcalis. 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 B. 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. 

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

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

 GC, hypodermal gland cell ; Hr, noninnervated hair ; A'^. nerve ; Po, pore of 

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



