LEPIDOPTERA : BOMBYCIDyE. 399 



the caterpillar state have long pencils of hair projecting 

 before and behind the body. 



The White-marked Orgyia, or Tussock-Moth, O. Icuco- 

 stiguia, Smith, expands one inch and three eighths, and 

 the wings are ashen gray crossed by wavy darker bands 

 on the forward pair, on which there is also a black spot 

 near the tip, and a minute white crescent near the outer 

 hind angle ; females lighter, and apparently wingless. 



The Genus Notodonta contains moths which in the 

 larva state are singularly humped, and have the last pair 

 of prop-legs prolonged in many cases, and, when at rest, 

 elevated over the back. 



The Unicorn Moth, N. nnicomis, 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 distin- 

 guished by the horn arising from the top of the fourth 

 ring. 



The Genus Lagoa has the body very stout and woolly, 

 and the wings short, broad, and wrinkled transversely. 



The Common Lagoa, L. crispata, Packard, lives in the 

 raspberry, in the larva state. 



The Genus Limacodes has the wings rather broad and 

 deflexed, hind tibiae with four spurs, and abdomen slightly 

 tufted. The larvae are slug-like, and the under side of the 

 body is smeared with a sticky fluid, which leaves a slimy 

 track wherever they go. Their cocoons are round and 

 parchment-like, and fastened to the twigs of plants. 



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 



