324 STATES OF INSECTS. (Jmago.) 
(Attagenus Pellio), in the latter it is very short, but in 
the former it is very long, and nearly formed by a single 
joint. In Eurhynchus, a New Holland genus of the weevil- 
tribe, in the male the last joint, also, is much longer than 
it is in the female *. These examples will give you some 
idea of the principal variations that take place in the an- 
tennz of the sexes, and of the wonderful diversity of 
forms in this respect to which mere sexuality gives rise 
amongst insects. 
In the eyes, or stemmata, this diversity is less remark~ 
able. Latreille has described two ants, Ponera contracta 
and Myrmica caca, in the neuter of which he could dis- 
cover no eyes: in the former, the female, however, had 
large ones. ‘The male he appears not to have known, 
but it probably was not destitute of these organs; of the 
latter he was acquainted only with the workers. ‘The 
neuter of Myrmica rubra, another ant, has no ocelli or 
stemmata, although the male and female are provided 
with them‘. They are discoverable only in the former 
sex of that singular insect related to the ants, Mutzlla 
europea. Other insects differ in the size of the eyes of 
their sexes. In the hive-bee, and some Ephemera, the 
eyes of the drone or male are much larger than those of 
the worker and female, and also meet at the vertex, 
having their stemmata below the conflux; whereas in 
these latter they are widely distant?. In Stratyomis, 
® Linn. Trans. xii. t. xxii. f. 8. e. 6.f. 9. When I gave the 
name of Eurhinus to the genus here noticed, I was not aware that 
Illiger had named another Eurhin, which is so near that to avoid 
confusion I would alter my name as above.—K. 
b Fist. Nat. des Fourmis, 195—. 270—. 
¢ De Geer ii. 1094, 
4 Tbid. 650. * Mon, Ap. Angl. i. t. xi. Apis xx.e. 1. f. 2. g. t. xii. 
foe te 
