ANATOMY AND PHYSIOLOGY 



95 



6. v$\ placodcuni a membranous plate, its outer surface 

 continuous with the general integument (Fig. 123). Fnnc- 



FIGS. 116-125. 



123 



n 



Types of antennal sensilla, in longitudinal section (excepting Figs. 119 and 120). 

 Fig. 116, sensillum cceloconicum ; 117, cceloconicum; 118, basiconicum; 119, stylo- 

 conicum; 120, chaeticum; 121, trichodeum; 122, trichodeum; 123, placodeum; 124, 

 ampullaceum ; 125, ampullaceum ; c, cuticula; h, hypodermis; n, nerve; s, sensory cell. 

 Figs. 1 1 6, 1 1 8, 121, 123, 124, honey bee, Apis mellifera; 117, 119, 122, moth, Fidonia 

 piniaria; 120, moth, Ino pruni; 125, wasp, Vespa crabro. After SCHENK. 



