INSECTS. 
l6 
only the upper sheaths or elytra; yet by no means 
belong to the present order of Aptera. In some 
few species of Insects it will also be found that 
one sex is winged, while the other is apterous, as 
in some of the Moth tribe. The Aphides also, 
in the order Hemiptera, are known to have some 
individuals of the same species winged, and others 
wingless. Tliese instances may sometimes mislead 
a beginning entomologist ; but he w ill very soon 
learn to distinguish the real tribe to which the 
insect belongs, and will not hastily refer it to tlie 
Aptera. 
