10 



what lighter; abdomen the same color, with an 

 ocher shade. Front wings medium gray, sprinkled \\{ 

 with blackish scales, crossed near the tips by 

 two wavy angular blackish lines; a W- shaped 

 transverse line about one third the way from 

 the base; a black dot in the center, which is 

 sometimes double. (See Fig. 2, g.) The hind.; 

 wings are semi-transparent, of a silveiy luster, with \ 

 a darker border. Both pairs of wings are heavily 

 fringed. (See Fig 1, a.) 



The egg, plainly visible to the naked eye, is 

 elongated oval in outline; greasy whitish in color 

 when first laid, becoming darker as the embryo 

 matures within; and varies considerably in length 

 and breadth, as shown by the following measure- ^.J/kingrand^pnation 

 ments made from four different lots of eggs: of wings. (After sneii- 



"•^ en.) 



First lot, laid April 12, 1895— Length, 0.432 mm. ; breadth, 0.204 mm. 

 Second lot, laid April 17, 1895-Length, 0.480 mm. ; breadth, 0.240 mm. 

 Third lol, laid May 5, 1895-Length, 408 mm. ; breadth, 0.2J8 mm. 

 Fourth lot, laid June 19. 1895— Length, 0.444 mm. ; breadth.0.216 mm. 



This variation in size occurs also in eggs oE the same lot. The 

 general average length is 0.441 mm., and the breadth 0.222 mm. 

 The surface is irregular and has a crumpled appearance. 



TJie larva (Fig. 1, c) when first hatched is very small, being 

 only 1.083 mm. long, with a body diameter of 0.19 mm; head 

 slightly larger, measuring 0.247 mm.; flesh-colored, varying from 

 a whitish to a pinkish tint; head reddish brown; legs and pro- 

 legs a little lighter colored than body; body sparsely hairy, hairs 

 longest on the posterior segments, often measuring there 0.342 

 mm., but about 0.114 mm. on the other segments. When full 

 grown the larva varies from 12 to 14 mm. in length; form cylin- 

 drical, somewhat slender, with a rather uniform diameter of about 

 2 mm.; color as earlier, the pinkish tint more pronounced in 

 some than in others. Three pairs of true legs, and a well- developed 

 caudal pair; abdominal legs long, cylindrical, with a circular fringe 

 of hooklets at the crown. Piliferous warts black or brown, rather 

 minute but prominent; lateral ones more conspicuous in front of 

 the first spirasle, the subdorsal ones, one each side of the meso- 

 thorax, almost completely encircled by a narrow black ring inter- 

 rupted only at its upper margin. Each segment has six bristle- 

 bearing dots, four of which are conspicuous and two smaller; a 

 transverse reddish-brown patch on the segment next the head, 

 divided, from front to back, by a faint central line; surface of body 

 rather smooth. 



The chrysalis (Fig. 1, d) varies from 9 to 10.5 mm. in length, 

 and from 2.5 to 3 mm, in width. Reddish brown above, the head 

 and thorax being darker than the rest of the body, much lighter 

 below, the shade becoming lighter from the head back, approach- 

 ing a yellowish tint on the v/iug-pads and abdomea; posterior 

 part slightly curved and cylindrical; tip of the last segment con- 

 siderably darker than the rest of the body and furnished with 9 



