| | | | | | ----------+---------+---------+---------+---------+---------+--------- | | | | | | Biting or | | | | | | sucking | | | | | | mouth | | | | | | parts | | | | | | | | | | | | ----------+---------+---------+---------+---------+---------+--------- | | | | | | Complete | | | | | | or | | | | | | incomplete| | | | | | metamor- | | | | | | phosis | | | | | | | | | | | | ==========+=========+=========+=========+=========+=========+========= [Illustration: FIG. 141.--CODLING MOTH, from egg to adult. (See Farmers’ Bulletin, p. 95.)] [Illustration: FIG. 142.--CABBAGE BUTTERFLY, male and female, larva and pupa.] [Illustration: FIG. 143.--LIFE HISTORY OF SILKWORM.] [Illustration: FIG. 144.--SCALES FROM BUTTERFLIES’ WINGS, as seen under microscope.] TO THE TEACHER: _These illustrated studies require slower and more careful study than the text. One, or at most two, studies will suffice for a lesson. The questions can be answered by studying the figures. Weak observers will often fail and they should not be told, but should try again until they succeed._ [Illustration: FIG. 145.--SCALES ON MOTH’S WING.] [Illustration: FIG. 146.--HEAD OF BUTTERFLY.] [Illustration: FIG. 147.--SECTION OF PROBOSCIS of butterfly showing lapping joint and dovetail joint.] [Illustration: FIG. 148.--HEAD OF BUTTERFLY (side view).] FIGS. 141-148. =Illustrated Study of Lepidoptera.=--Study the stages in the development of _codling moth_, _silkworm moth_, and _cabbage butterfly_. Where does each lay its eggs? What does the larva of each feed upon? Describe the pupa of each. Describe the adult forms. Find the _spiracles_ and _prolegs_ on the silkworm. Compare _antennæ_ of moth and butterfly. Which has larger body compared to size of wings? 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?