THE VAT J, WKIiWOTiM — SNOOC.RASS. 



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The webs of the two generations of caterpillars become so numerous 

 and so conspicuous in the trees by fall that probably for this reason 



Fig. 11. — The head of a webworm moth. A is a side view showing the proboscis coiled 

 beneath and Uie antennae projecting from above the eyes ; B is the same, more en- 

 larged, with the fur removed and only the base of one antenna (Ant) shown ; C is a 

 facial view showing the large compound eyes (E) on the sides of the head and the 

 small eyes (O) above them. At the lower edge of the face, in front of the mouth, is 

 the narrow upper lip or labium (Lm). Behind the mouth is a weak lower lip, not 

 shown, which supports a pair of jointed appendages, the labial palpi (LbPlp). At the 

 sides of the mouth are two long strap-like appendages (Mx) which, in life, are united 

 along their inner hollowed surfaces and form a tube, the proboscis, through which the 

 moth sucks up water or nectar. When not in use the proboscis is coiled beneath the 

 head as in figures A and B. The parts of the proboscis represent a pair of jaws in 

 other insects, and are united with the lower lip in the caterpillar (fig. 9, Mx and Lb). 

 Each carries a small palpus at its base in the moth (MxPlp). The biting jaws of 

 the caterpillar (tig. 9, Md) are reduced to small knobs (Md) in the moth, which can not 

 eat solid food. A small point, called the epipharynx (Ephy), projects beneath the 

 upper lip (Lm). 



the species has been named the fall webworm (Ilyphantria cunea of 

 entomologists), which name distinguishes it from several other kinds 

 of webworms. The webs somewhat resemble the homes of the tent 



