INSECTS INJURIOUS TO THE APPLE TREE, 



THE WHITE-MAEKED TUSSOCK-MOTH. 



( Orgyia lettcostigma, Smith and Abbott. ) 



Order of LEPIDOPTERA. Family of Akctiid^. 



Harris's Treatise, State Ed., page 366 ; Fitch's 1st and 2d New York Keports, p. 209 ; 

 Riley's 1st Missouri Rep., p. 144. 



There is no noxious insect which I have received from so many 

 difterent locahties during the past summer, as the pretty caterpil- 

 lar, which is the larva of the above-named moth. It is easily 

 recognized by its coral red head and neck, and two tubercles of 

 the same color, on the ninth and tenth rings. There are four 

 short, thick, brush-like tufts on the fourth and three following 

 riugs, varying in color from cream color to yellow, and three long 

 pencils of black hairs projecting one on each side of the neck, and 

 the other from the top of the eleventh ring. It is figured on plate 

 seven, of Harris's Treatise, fig. one; and there is a better figure 

 on the 14:5th page of Mr. Riley's first Missouri Report, a copy of 

 which is given at the head of this article, and also a figure of the 

 male of the moth which proceeds from it. This insect has always 

 been described as an exclusively leaf-eating caterpillar, but in 



