INSECTS
Fig. 162. Facial view of the head of the tent caterpillar moth, with covering scales removed, and antennae cut off near their bases
Ant, base of antenna; E, compound eye; Lb, labium; LpPlp, labial palpus; Lm, labrum; Mth, mouth; Mx, maxilla
flower corolla, or when it would merely take a drink of water or other liquid. The proboscis consists of the greatly lengthened maxillae firmly attached to each other by dovetailed grooves and ridges. The inner face of each maxilla is hollowed in the form of a groove running its entire length, and the two grooves apposed between the united maxillae are converted into a central channel of the proboscis. The two blades of the proboscis spring from the sides of the mouth. The first part of the alimentary canal just back of the mouth is transformed into a bulblike sucking apparatus. The
Fig. 163. Head and mouth parts of the peach borer moth
A, side view. B, three-quarter facial view. Ant, basal part of antenna; E, compound eye; LbPlp, labial palpus; O, ocellus; Prb, proboscis
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