398 



PSYCHE. 



[August — October 1S90. 



short and fine, those in the middle of 

 the horn not being one half as long as 

 the diameter of the appendage. The 

 horn is very slightly divided at the end 

 into two tubercles, each hearing a 

 bristle. 



30 June, having fed for two or tliree 

 days they are now larger than before, 

 being 6 to 7 mm. in length, and now the 

 head is no wider than the body, the latter 

 having after two or three days' consump- 

 tion of food filled out, so that the body 

 does not taper so much toward the end. 

 There are as yet no spots or stripes on 

 the body. The piliferous warts are pre- 

 sent, the four dorsal ones being arranged 

 in a trapezoid ; they are faintly marked, 

 and green in color. 



At the end of stage I, about 3-4 July 

 the body had grown so that the caudal 

 horn was scarcely two-thirds as long as 

 the body, when 6 to 7 mm. in length. 

 There are now, just before ecdysis, faint 

 traces of a diffuse yellowish line, which 

 is seen more distinctly in stage TI, and 

 the granidations on the skin are more 

 distinct than when the larva was first 

 hatched. 



Stage II. — 4-5 July. Length 10 mm. 

 The head is now about as wide 

 as the body, not quite so wide as 

 wdiere the body is thickest, i.e. — at the 

 first abdominal segment. The caudal 

 horn is now only half as long as the 

 body, and is black and hirsute. It is dis- 

 tinctly divided at the end, each lobe bear- 

 ing a seta as long as the horn at the end is 

 thick. About eight rows of granula- 

 tions cross each segment, and there is 

 now a faint g-reenish-vellow lateral line ; 



but no traces of the oblique lateral 

 stripes can be seen until at the end of 

 the stage. The hairs now have lost 

 their bulbous shape, and taper some- 

 w'hat to t!ie end. It usually rests on the 

 midrib of the under side of the leaf in 

 this and the preceding stage. 



Stage III. — 9-1 1 Ji^dy. Length 

 30 mm. The head is now proportion- 

 ately small, narrower than the rather 

 thick body, which is a little swollen on 

 the 3rd thoracic and ist abdominal 

 segments. The caudal horn is onlv as 

 long as the body is thick ; it is black, 

 becoming pale at the tip, and green on 

 each side at the base. There are eight 

 wrinkles across the back of the oasal 

 abdominal segments. 



There is a very narrow dorsal dark 

 green thread-like line, and a much 

 wider diffuse subdorsal line, the two 

 meeting at the base of the caudal horn ; 

 below is a whitish green lateral line also 

 ending on the base of the caudal horn. 

 The oblique lines are yellowish, and 

 much more distinct than at the close of 

 the preceding stage ; the bars only 

 extend from the hinder end downward 

 to the front edge of the same segment, 

 not extending upon the next segment. 

 The spiracles are green, not ringed, but 

 bearing two obliquely vertical parallel 

 twin oblong fine black dots. The 

 wrinkles are well marked on tne dorsal 

 smface ; lower down the sides they 

 break up into raised white spots 

 or granulations. The suranal plate is 

 faintly edged with yellowish. 



Stage IV.— ^\o\\\\.^<\ \^y\\y. Length 

 25 to 30 mm. The head is pea-green, 



