STATES OF INSECTS. (lmago.) 32% 
of male Cerocome are not very different*. Mr. Mar- 
sham has described a little Haliica under the name of 
Chrysomela nodicornis, from a peculiarity of the same 
sex not to be found in the other. The fourth joint is 
very large and obtriangular ; in the female it is merely 
longer than the rest. In H. Brassice and quadripustu- 
lata the fifth joint.is larger and longer than all but the 
first in the male, in their females it is only longer. In 
some moths (Herminza) there is also a knot in the middle 
of the male antennze®. In Nofterus, a water-beetle, the 
six intermediate joints are thicker than the rest, begin- 
ning from the fourth, and the last but one ends internally 
in a truncated tooth. The fifth and two following joints 
in the male antennze of Meloe are larger than the rest, 
which distinguishes them, as well as a remarkable bend 
observable at that part °. 
Variations of the kind we are considering are also ob- 
servable in the clava, or knob, in which antennz often 
terminate. You have doubtless observed that the la- 
mellated clava of the antennze of the common cockchafer 
is much longer and more conspicuous in some indivi- 
duals than in others—the long clava belongs to the male’: 
In another species, Melolontha Fullo, that of this sex is 
nine or ten times the length of that of the other. In 
Colymbetes serricornis, a water-beetle, the male has a 
serrated clava of four joints. In Dorcatoma dresdensis ¢, 
and also Enoplium damicorne, two beetles, it is nearly 
branched in the male, but much less so in the female. 
In a little destructive beetle, common in our houses 
* Prate XI. Fic. 22. + N. Dict. d’ Hist, Nat, xiv. 393, 
© Prate XII. Fie. 7. ¢ Prate XXV. Fie. 1. 
e Ibid, Fic, 21. 
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