Kq. 4.] GYPSY MOTH — APPENDIX. 401 



The thorax is dark brown with a faint median sulcus. 

 Tlie posterior margin of the meta-thorax is tinged with red. 

 Immediately behind the posterior angles of the thorax, on 

 each side, is a small dark-brown wedge-shaped spot, arising 

 from the outer margin of the abdomen. Following this spot 

 and extending on either side to the anus there is a border 

 of semi-elliptical spots of similar color, one spot on each 

 segment. At the anus there are three small markings of 

 the same color. On some specimens, bordering the interior 

 margins of the dark-brown spots, there is a faint undulating 

 white line extending around the abdomen. On the dorsum 

 of the abdomen, about equi-distant from each other and the 

 posterior margins, are two transverse copper-colored spots. 

 Between the anterior of these spots and the thorax there 

 are two narrow transverse markings of similar color. 

 Under surface of the abdomen reddish brown ; legs of 

 similar color, but somewhat darker. Tarsi two jointed. 

 Beak extending to hind coxae, of same color as legs. In 

 this stage these insects are in general phyllophagous. The 

 first molt takes place in about seven or eight days. 



Second Stage. — (Plate 1, Fig. 3.) Length, 3 mm. 

 General form same as in preceding stage, except that the 

 head is quadrate and the abdomen larger in proportion to 

 the size of the head and thorax. These latter are pitchy 

 l)lack in this stage. With the exception of the terminal 

 joint, which is shorter, much darker and less dilated, the 

 joints of the antennte retain their relative length. 



The abdomen is dark red. Marginal spots black and 

 bordered on the inner margin with white. Behind the 

 thorax on the dorsum of the abdomen are two lar^e trans- 

 verse dark-brown spots, which in some specimens are 

 nearly fused together. Posterior to these spots are two 

 smaller transverse markings of similar color. Under sur- 

 face of head and thorax dark brown. Legs and beak of the 

 same color. Abdomen same color as upper surface. In 

 this stage the insect develops predaceous habits. The 

 second molt takes place in about twelve days. 



Third Stage. — (Plate 1, Fig. 4.) Length, 5 mm. 

 General form of l)ody as in preceding stage, but the head 



