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(9) mouth cavity, (10) epipharynx, (11) palpi, (12) antennae, 
(13) various structures on the antenna?, (14) caudal styles, 
(15) organs on base of wings and on legs, and (16) on different 
organs for different orders of insects. Notwithstanding this 
assortment of theories, it is probably correct to state that 
until recently it was the consensus of opinion that the ol¬ 
factory organs are located on the 
antennae. However, Mclndoo 1 
shows that if the antenna; of the 
honeybee are removed, the insect 
still reacts to odor stimuli. It 
is impossible to go into the de¬ 
tails of this work here, but, in 
brief, this author concludes that 
certain sense organs located at 
the bases of the wings, on the legs 
and on the stings of females are 
olfactory organs, named by him 
olfactory pores. His work covers 
not only a study of the structure 
and distribution of these organs 
but is supported by experimental 
evidence, which is usually omitted 
in other papers on this subject. 
The location of these organs is 
indicated on the diagrams from 
Mclndoo’s paper (Figs. 88 and 
89), the organs being indicated 
by black areas and the different 
groups being numbered (21 
groups in all, Nos. 19, 20, and 21 being on the sting and 
not shown in the diagrams). The structure of a typical 
olfactory pore is shown in Fig. 90. From the sense cell 
(SC), a nerve fiber (SF) extends to the surface of the 
body through the pore aperture (PorAp), this aperture being 
Fig. 88. — Diagram of dorsal 
view of worker, showing loca¬ 
tion of groups of olfactory 
pores. 
1 Mclndoo, N. E., 1914. The olfactory sense of the honey bee. 
exp. zool., XVI, pp. 265-346. 
Jr. 
