The strokes and touches used upon plate 21 are more delicate than any
previously given, though similar in character. No. 1 is drawn with the
side of the chalk, the accent being with the left end. Allow the hand
to tremble a bit and the texture desired is more readily obtained.
Stroke 2 is produced in the same manner. After these are drawn add the
shades, stems, and leaf with charcoal, and high lights with touches of
white chalk.
Stroke 3 is exactly like that at No. 2, plate 20, though drawn with
a much smaller piece of chalk. A series of these strokes, with the
addition of touches with the charcoal and point of the chalk, as
indicated in the sketch, will produce the caterpillar.
Strokes 4 and 5 are valuable in sketching a butterfly or moth. They
are gray strokes with the side of the chalk, the pressure being upon
the end forming the outline. In work of this kind study nature very
carefully, as no sketch or copy can do what nature can for the teacher.
After the general form of the butterfly is drawn with these light gray
strokes, add the details, using touches of chalk or charcoal, and
occasionally blending them with the tip of the finger.
[Illustration: Plate 22]