393 



ARTICULATES ! INSECTS. 



The Salt-Marsh Moth, S. acrcca, Drury, expands about 

 two inches, and the fore wings are generally white, hind 

 win"s and abdomen yellow, the wings with black spots, 

 and the abdomen with a row of black spots above, two 



Fig. 294. 



Fig. 293. 



Fig. 296. 



Salt-Marsh Moth, Larva, Pupa, and Imago, 5 1 . acraca, Drury. 



rows on the sides, and one row below. The female ex- 

 pands about two inches and a half, and differs from the 

 male in having the hind wings white, or in having all the 

 wings ashy gray, with the usual black spots. The cater- 

 pillars, produced from eggs laid on the grass of salt- 

 marshes, attain the length of an inch and three quar- 

 ters, and are clothed with brown hairs in spreading 

 tufts. 



The Weaver, 5. tcxtor, Harr., expands an inch and a 

 quarter, and is white, without spots. The larvae weave 

 large webs over the branches of fruit and other trees in 

 the fall, and devour the upper skin and pulpy part of the 

 leaves. 



The Genus Halcsidota, or Lophocampa, Harr., com- 

 prises moths whose larvne are short, thick, and have a 

 crest of tufts along the back. It contains the Hickory 

 Tussock-Moth, H. carytz, Harr., which expands about two 

 inches and a quarter ; and the Checkered Tussock-Moth, 

 H. tcsscllaris, Sm. Abb., which expands about two inches. 



The Genus Orgyia embraces Tussock-Moths which in 



