154 THIRD ANNUAL REPORT OF 



Description of the Egg.— Length 0.3S inch. Diameter at base about the same. Globular, 

 with the top often slightly depressed. Hexagonally reticulate, the cells more or less regular, 

 sunken so as to give the egg a thimble-like, pitted appearance, and about 10 of them in the longi- 

 tudinal row and 30 in the circumference. Covered with translucent filamentous spines, one aris- 

 ing from every reticulate angle and giving the egg a pubescent appearance. Each spine about as 

 long as the cell is wide, those on the top being longest. 



The young larva differs materially from its more mature self, as 

 will be seen from the description which follows. It grows apace, 

 casting off its old coat and devouring the same three times during its 

 growth, and eventually suspending itself by the hind legs and trans- 

 forming to the chrysalis, frequently within a month from the time of 



hatching. The mature larva 

 (Fig. 70, a) presents a 

 roughened tubercled ap- 

 pearance and varies much 

 in color, the predominan 

 colors being moss-green, 

 brown and creamy-white; 

 the moss-green parts being 

 studded with beautiful light 

 blue points. The pupa 

 Fig. 70, b) is marked with 

 burnt-umber brown, ash-gray, flesh-color and silvery white, and is 

 characterized like that of the other species of the genus, by a curious 

 thin almost circular projection which has been likened to a Roman 

 nose, growing out of the middle of its back. 



Description of mature Larva. — Length 1.20, diameter 0.25 inch. General color either 

 whitish or olive-green. Body thickly granulated. Head dull olive, with dense minute prickles ; 

 its vertex bifid and terminating in a pair of prickly cylindrical horns, transversely arranged and 

 each about 0.03 inch long. Back speckled and mottled with olive of different shades above the 

 line of the spiracles, except joints 2 and 8 and the upper part of 7 and 9, but with a continuous pure 

 white line below the spiracles, beneath which white line on joints 4-10 is a large olive patch ex- 

 tending on joints 6-9 to the external tip of the prolegs. A pair of black transversely-arranged 

 dorsal dots in the suture behind joint 2, and a more or less obvious lateral one just above and be- 

 hind the 5th and 7th pair of stigmata surmounting the lateral white line. Joints 3-7 and 9-11 

 with more or less, shining, elevated, blue dots. On joint 2 a pair of prickly cylindrical black horns, 

 transversely arranged and 0.16 inch long. On joints 3, 10 and 11 a pair of large dorsal tubercles 

 transversely arranged, each crowned by a little bunch of 8-12 robust prickles. On joint 5 a pair of 

 similar tubercles, but still larger, of a yellowish color, and mamma-like. On joints 4, 6, 7 and 9 

 tubercles similar to those on joints 3, 10 and 11, but smaller. Onjoint 12four blackprickly dorsal 

 horns, quadrangularly arranged and each about 0.03 inch long. Stigmata and legs blackish. 



Described from many specimens. Such are the prominent and more constant traits of this 

 larva, but it is so variable in the general depth of coloring and in the proportion of the lighter 

 and darker shades that it is next to impossible to frame a description which shall alike agree with 

 half a dozen specimens. 



The newly hatched larva presents a quite different appearance. It is 0.09 inch long with a 

 yellowish-brown head twice as large as the first joint and distinctly bilobed. The first joint is also 

 larger than the others. Each joint is divided by a transverse impressed line, and upon the dorsum 

 of each fold thus made are 4 pale elevated spots, the anterior outer ones larger than the rest, as 

 shown at Fig. 69, b, especially on joints 2, 3, 5 and 11 where they appear conical with a darker an- 

 nulation at base. There is a subdorsal and a sub-stigmatal row of similar rounded warts, and they 

 all give rise to little pale bristles or spines. The general color is pale yellowish-brown, mottled 

 with dark streaks, especially below the stigmata. The second period scarcely differs from the first 



