BOMBYCIDS. 
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may often be seen hanging to the stems and leaves of the oak in 
September. This is the larva of Edema albifrons and is sometimes 
Larva of Edema albifrons. 
abundant enough to do considerable damage to the trees. When not 
feeding, and especially if disturbed, the caterpillars bend the head 
Edema albifrons. 
and rear end of the bodj^ over the back. The perfect insect has 
brown upper wings with a whitish band along the upper margin, and 
light yellowish-brown lower wings. 
Ccelodasys unicornis. 
Ccelodasys biguttata. 
A curiously humped caterpillar is the larva of Coelodasys , of 
which we have several species. Coelodasys unicornis is buff-gray, 
Larva of Ccelodasys. 
with darker markings, and Coelodasys biguttata is gray with brown 
markings and light brown hind wings. 
