54 ENTOMOLOGY 
other secondary sexual peculiarities of the legs may be men- 
tioned the tibial brushes of the male Catocala concumbens, 
regarded as scent organs, and the queer appendages of male 
Dolichopodide that dangle in the 
air as these flies perform their 
dances. 
The pulvillus is commonly an 
adhesive organ. In flies it has 
glandular hairs that enable the in- 
sects to walk on smooth surfaces 
and to walk upside down; so also 
in many beetles and notably in the 
honey bee (Fig. 63); in this insect 
the pulvillus is released rapidly 
from the surface to which it has 
been applied, by rolling up from the 
edges inward. 
Foot of honey bee, Apis mel- - 
lifera. c, c, claws; p, pulvillus; 5 
#818, tarsal segments—After “Thus tactile hairs are almost always 
CHESHIRE. ” 
Sense organs occur on the legs. 
present on these appendages, while 
auditory organs occur on the front tibice of Locustidze, Gryllidze 
and some ants. Finally, the legs may be used to produce sound, 
Fic. 64. 
Caterpillar of Phlegethontius sexta. Natural size. 
