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hair as long as the thickness of the body. Feet i6. Duration 

 of this period 6 days. 



After 1st Moult. — Length .10 inch. Ground color similar to 

 that of the preceding period ; the tubercles dark brown instead of 

 black, more than one hair from each. Head as before. Dura- 

 tion of this period 8 days. 



After 2d Moult. — Length .20 inch. The only change aside 

 from size is that the ground color is a little darker, and there are 

 more hairs in the fascicles arising from the tubercles than before the 

 moult. They are more active than they have been before. Du- 

 ration of thisperiod 6 days. 



After 3d Moult. — Length .45 inch. Ground color leaden 

 gray; dorsal, subdorsal and substigmatal stripes white. In the 

 middle of each joint the subdorsal is orange, and there is also an 

 orange spot just below this, above a tubercle. There are 10 tuber- 

 cles to each joint distinctly visible now ; the tuft of short hairs 

 arising from each is black above but gray on the sides. Head 

 black. Towards the close of this period the following changes 

 were noticed: Ground color dull black, a little paler on the sides 

 and venter ; dorsal line yellowish white, subdorsal and substig- 

 matal blackish ; joint i somewhat lighter than the others. Head 

 and thoracic feet jet black ; prolegs pale, at the tip, orange spots on 

 the sides dim. Duration of this period 7 days. 



After the 4th Moult. — Length i.oo inch. Color uniform 

 black, the head shining, sides of the prolegs pale, and an indis- 

 tinct pale dorsal line. As before, the fascicles of hairs from the 

 dorsal tubercles black, those from the sides brown ; those on 

 joints I and 2 all brown. The interior part of the neck is red- 

 dish. Duration of this period 7 to 8 days. 



After 5th Moult. — Length 1.70 inches. Color of body, tu- 

 bercles and hairs as before, with the exception that the hairs on 

 joint 2 are black, on the dorsum. Dorsal line nankeen yellow, faint 

 on joints i to 3 and 11 to 12, but on all of the others distinct 

 and expanded somewhat in the middle of each joint, those in the 

 middle of the body expanding most ; stigmata, orange. Head 

 and thoracic legs brownish black ; the prolegs brown, not very 

 dark ; venter slate color. No trace of any lines but the dorsal. 



Mature Larva.— Length from 1.65 to 1.70 inches; width of 

 head . 1 5 inch ; of middle joint .28 ; between joints .20; head brown- 

 ish black, clypeus, palpi and antennae whitish, the tips of the lat- 

 ter black ; color of body and dorsal line as at the first of the period, 

 as also the tubercles and hairs ; 10 of the tubercles to each joint. 

 All the other points as given before. Duration of this period 

 from 3 to 1 1 days. 



Chrysalis. — Length .75 inch, from anterior end to end of 

 wing cases .43 inch, these not reaching quite to the posterior part 

 of abdominal joint 5 ; antennae and leg cases .35 inch from end. 



