INSECTS 



Ant-i 



flower corolla, or when it 

 would merely take a drink 

 of water or other liquid. 

 The proboscis consists oi 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 run- 

 ning 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 pro- 

 boscis 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 



Mth 



Fic. 162. Facial view of the head of 

 the tent caterpillar moth, with cover- 

 ing scales removed, and antennae cut 



off near their bases 

 Ant, base of antenna; E, compound 

 eye; Lb, labium; LbPlp, labial palpus; 

 Lm, labrum; Mth, mouth; Mx, maxilla 



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; 0, ocellus; Prb, proboscis 



308 



