396 



THE GYPSY MOTH. 



61, Fig. 1) are ovoid, .9 Dim. in length and .8 mm. in 

 width. The smaller end of the egg is attached to the sur- 

 face on which the cluster is deposited. At the top of the 

 egg is a well-defined circular cap. The greater part of the 

 surface of the egg is covered by irregular rows of minute 

 short spines (Plate 61, Fig. 4), nearly absent at the base 

 of the egg, while around the circumference of the cap is a 

 row of long, slightly curved capitate spines (Plate 61, Fig. 

 5), arranged in a circle. The eggs hatch in about eight 

 days. Four lots of eggs kept at the insectary hatched in 

 seven, eight, eight and nine days respectively. In hatching, 

 the circular disk at the top of the egg is pushed loack, but 

 usually remains attached at one point. 



First Stage, — The newly hatched bug (Plate 61, Fig. 2) 

 is 1.5 mm. in length. Form, ovate, head, thorax and abdo- 

 men distinctly separated. Head smooth, broadly elliptical, 

 wider than long, of a deep copper color, and sparsely clothed 

 with short, pale-brown hairs ; eyes large, projecting later- 

 ally. Antennae 1 mm. long, four-jointed, of the same color 

 as the head, but lighter at the joints, and clothed with a few 

 hairs. The basal joint is stout, slightly curved outward; 

 the second and third joints are of the same length as the 

 basal, and each is enlarged at its outer end, which is quite 

 sharj)ly truncate. The fourth joint is from one-fourth to 

 one-third longer and wider than the other joints, being quite 

 broadly dilated. The thorax is of the same color as the 

 head, and widened posteriorly. A faint sulcus, indicated 

 by a narrow line, extends from the centre of the head down 

 the dorsal line of the thorax to the abdominal segments. 

 Abdomen yellowish red, varying to vermilion. On the dor- 

 sum of the abdomen are three large, dark, bronze-colored 

 spots, extending transversely, and separated by a narrow 

 line of the body color. A short, narrow line of the same 

 color as the spots sometimes occurs in front of the anterior 

 spot, and also immediately behind the posterior one. 

 Around the lateral margin of the abdomen on each side is 

 a row of semi-elliptical bronze-colored spots. Just ante- 

 rior to the first of these spots is a narrow, wedge-shaped 

 marking of the same color, while at the extreme posterior 



