16 
Obteda, shrowded, folded in a crustaceous covering, but in such 
a manner, that the head and thorax may easily be distinguished 
from that part in which the abdomen is lodged, as in Lepidopterous 
insects 
Coarctata, straitened, in a globular case, as in the musca fly ; the 
oestrus, gad fly. 
The animal loosed from this last confinement has now its antennae, 
becomes then the Imago, or perfect insect, and in most species is im- 
mediately capable of generation. 
