Fig. 146.—Head of Butterfly.
Describe the scales from a butterfly’s wings as seen under microscope (144). How are the scales arranged on moth’s wing (145)? By what part is scale attached to wing? Do the scales overlap?
Study butterfly’s head and proboscis (Figs. [146]–148). What shape is compound eye? Are the antennæ jointed? Is the proboscis jointed? Why not call it a tongue? (See text.)
Which mouth parts have almost disappeared? What is the shape of cut ends of halves of proboscis? How are the halves joined to form a tube?
If you saw a butterfly on a flower, for what purpose would you think it was there? What, if you saw it on a leaf? How many spots on fore wing of female cabbage butterfly? (Fig. [124], above.)
Does the silkworm chrysalis fill its cocoon?
Fig. 148.—Head of Butterfly (side view).
Fig. 147.—Section of Proboscis of butterfly showing lapping joint and dovetail joint.