Cuticle of pupa or puparium splitting longitudinally down the back, to allow escape of imago.
In about as many more days the puparium state would be entered, and in about six days more the fly or imago would appear.
This description was taken from a puparium in my own cabinet; it is similarly described by De Geer i. 490.
We present the figure of an allied fly, Merodon Bardus (Fig. 78; a, puparium, natural size).
Male unknown, but puparium smaller and rather darker in colour than that of the female.
The mode in which insects make their way out of the puparium differs in different orders.
First pellicle, comparatively large; the second almost fills the puparium.
puparium -ia: in Diptera, the thickened larval skin within which the pupa is formed.
The secretion forming the puparium is mixed with bark-cells of the tree, arranged longitudinally.
Ventral scale: in Diaspinae, the under part of the puparium, interposed between the insect and the plant.