236 LEPIDOPTERA OF NORTH AMERICA. 



2. C? americana Fab. 



Male. Antennae strongly pectinate. Wings whitish ; primaries 



with some fuscous costal streaks. 



Fab. 



3. C. sylvatica Harris. Ins. of Mass. p. 271. 



Brownish-yellow or nankin color. The hind wings, except at 

 base, are light rusty brown. On the fore wings are two oblique 

 rust-brown and nearly straight parallel lines. A variety is some- 

 times found with a broad red-brown band across the fore wings, 

 occupying the whole space, which, in other individuals, intervenes 

 between the oblique lines. The wings expand from one inch and 

 a quarter to one and three quarters. 



Larva. Light blue, clear on the back, and greenish at the sides. 



Head blue, without spots. Two yellow spots and four black dots 



on the top of the first segment. Along the top of the back a row 



of eleven oval white spots, beginning on the second segment, and 



two small elevated black and hairy dots on each segment, except 



the eleventh, which has only one of larger size. On each side of 



the back is a reddish stripe bordered by slender black lines ; and 



lower down on each side is another stripe of yellow color between 



two black lines. The under side of the body is blue-black. Lives 



in communities of three or four hundred under a common web or 



tent, which is sometimes made against the trunk of the walnut, oak, 



and more rarely of apple-trees. 



Northern States. 



Harris. 



ARTACE Walker. 



Body moderately stout. Proboscis obsolete. Palpi stout, por- 

 rect, pilose, not extending beyond the head ; first joint short; third 

 minute, conical. Abdomen extending a little beyond the hind 

 wings. Legs stout, pilose; hind tibiae with two minute apical 

 spurs. Wings rather narrow. Fore wings straight in front, round- 

 ed at the tips, very oblique along the exterior border; interior 

 angle somewhat rounded and very obtuse ; first and second inferior 

 veins contiguous at the base ; third about twice further from the 

 fourth than from the second. 



