. Bulletin - United States National Museum. Science. 24 BULLETIN 67, UNITED STATES NATIONAL MUSEUM. insects is due to the scales that cover the wings and body. These scales are of various shades and structure, and so placed as to over- lap each other. Their colors range from the most brilliant to the most delicate, and often display a glittering iridescence unapproach- able by any human artifice; and the pattern in which the colors are arranged is often of the most attractive and exquisite design, the delight of childhood and the admiration of age. ff 7 io u n. Fig. 47.—A caterpillar: 1, Head;
. Bulletin - United States National Museum. Science. 24 BULLETIN 67, UNITED STATES NATIONAL MUSEUM. insects is due to the scales that cover the wings and body. These scales are of various shades and structure, and so placed as to over- lap each other. Their colors range from the most brilliant to the most delicate, and often display a glittering iridescence unapproach- able by any human artifice; and the pattern in which the colors are arranged is often of the most attractive and exquisite design, the delight of childhood and the admiration of age. ff 7 io u n. Fig. 47.—A caterpillar: 1, Head; 2, thorax; 3 to 10, segments of body; 11, horn; 12, last segment; 13, true legs; 14, false legs or prolegs; 15, anal claws. The mouth-parts of the Lepidoptera are modified to form a long proboscis, haustellum, or sucking tube, which is usually carried rolled up under the head and hidden by scales. In some species, as the hawk moths, this proboscis is very long, so that the moth may hover in front of a flower, insert the tube to the bottom of the flower, and extract the nectar. The young, or caterpillars (fig. 47), are of very diverse appearance, but usually elongate, with a distinct head and three pairs of legs. Behind these true legs are several pairs of fleshy prolegs, which assist in crawling. These are from four to ten in number. These caterpillars are often pro- vided with hairs, bristles, or spinous projections. All (with a very few exceptions) feed on vegetation, usually living plants, and consequently do a great deal of damage. The generally accepted division of the Lepidoptera is that of butter- flies (Rhopalocera) and moths (Heterocera). The butterflies as a rule have the antennae clavate or knobbed at tip, hold their wings erect when at rest, fly by day, and they do not spin a cocoon to inclose the pupa, which is placed above ground. Many of the butterflies have. Please note that these images are extracted from scanned page images that may have been digitally enha
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