STATES OF INSECTS. (Jmago.) 319 
the various tribes of bees (Anthophila), these organs in 
the latter are what is denominated broken, the main body 
of the antenna forming an angle with the first joints: but 
in the former this does not take place. 
The antennz of the sexes do not always agree in the 
number of joints. In the bees, and many other Hymeno- 
ptera, the male has one more joint than the female; as is 
the case also in Gidemera notata (Cantharis acuta Marsh.). 
In Pteronus Laricis, a kind of saw-fly, the latter has only 
sixteen joints in its antennee, while the former has twenty- 
four*. In Rhipicera marginata, a beetle, the beautiful 
antennee of the male consist of thirty-two joints, while 
the female has no more than eleven! In Chelonus the 
male, on the contrary, has the smallest number of joints, 
namely sixteen; while the female has twenty-five. 
In nothing do the sexes differ more materially than in 
the ramification of these organs, and their plumage. By 
attending to this, you may often detect the sexes in an 
instant; since the antennz of the males in numerous in- 
stances are much more complex than those of the females. 
For what end the Creator has so distinguished them is not 
quite clear; but most probably this complex structure is 
for the purpose of receiving from the atmosphere informa- 
tion of the station of the female. A tendency to branching 
willbe found in the antennze of some males, in tribes where 
these organs are usually perfectly simple in both sexes. 
Thus, in the male of Chelostoma mazillosa,—mistaken for 
another species by Linné, which he names Apis florisom- 
nis,—the intermediate joints on their inner side project 
into an angle‘; and those of the same sex of the common 
* Jurine Hymenopt. 61. t. vi. f. 8. » Ibid. 289. 
* Mon. Ap. Ang). i. t. ix. Apis **. c. 2.y.f. 9. 
