39^ 



ARTICULATES I INSECTS. 



The Salt-Marsh Moth, 5. acrcea* Drury, expands about 

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

 wings and abdomen yellow, the wings with black spots, 

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



Fig. 294. 



Salt-Marsh Moth, Larva, Pupa, and Imago, . acroea, 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 are clothed with brown hairs in spreading tufts. 

 The Weaver, S. textor, 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 pulpy part of the leaves. 



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



prises moths whose larvae are short, thick, and have a crest of tufts along the back. 



The Genus Orgyia embraces Tussock-Moths which in 



the caterpillar state have long pencils of hair projecting before and behind the body. 



The Genus Notodonta contains moths, which in the 



larva state are singularly humped. 



The Unicorn Moth, N. unicornis, Sm. Abb., expands 



an inch and a quarter to an inch and a half, and the fore wings are light brown, with 

 patches of greenish white, and with wavy dark brown lines, two of which enclose a whitish 

 space near the shoulders ; hind wings of the male dingy white, with a dusky spot near the 

 inner hind angle. The caterpillar, found in August and September on plum and apple 

 trees, attains an inch in length, and is distinguished by the horn arising from the top of the 

 fourth ring. 



The Genus Bombyx contains the celebrated Silk-worm 

 Moth, B. mori, Linn. The caterpillar, known as the Silk- 

 worm, feeds upon the leaves of the mulberry. It spins a 



