COLIAS IV. 
With the later brood of larvae this period was greatly protracted by the cold 
weather, reaching twenty days and more. 
Mature Larva. —Length 1.1 to 1.2 inch; cylindrical, of even thickness, 
tapering on the last segments; each segment several times creased, and on the 
ridges so formed are numerous fine papillae, mostly white but many black, and 
each sending out a fine, short, white hair; color dark green ; at base of body a 
band of pure white through which runs a bright crimson line from segments 2 
to 11, almost continuous, seen faintly on 18 ; and beneath this band from 3 to 
12 is a large semicircular or semi-ovate black spot on each segment, the ante¬ 
rior ones largest, the rest diminishing gradually; on the edge of dorsal area is a 
faint whitish line, thickened at the posterior end of each segment so as to pre¬ 
sent well-defined white spots; next above the white line is one of crimson, 
broken on each segment, and usually well-defined only just above and near the 
white spots; beneath these last, on the last ridge of each segment from 5 to 10 
is a black dot; under side, feet and legs pale green; head obovoid, pale or yellow 
green. There is much variation in the mature larva with respect to the sub¬ 
dorsal lines. I have seen no living example in which they are wholly absent, but 
I have an alcoholic one received from Mr. Dodge in which there is no trace 
whatever of these lines, and the larva looks like that of Philodice. So I have a 
carefully drawn and colored figure from the late Dr. H. K. Hayhurst, which 
shows no trace of these lines. (Fig. e.) On the other hand, one in alcohol from 
Mr. Dodge shows a broad, continuous white stripe, like that at base, only a trifle 
narrower. Mr. Bean says, “ The glass showed the upper line to be white, edged 
with yellow only, there being no trace of red whatever, but the day after, the 
line was unmistakably margined with confused crimson and yellowish.” I re¬ 
ceived a number of larvae in their last stages from Mr. Bean, and my notes read, 
“In some, the white, crimson, and black of upper band are distinct; some have 
no trace* of the black, some neither of black or crimson; and in some the white 
line fades till nothing remains but the thickened end on each segment, and this 
may be represented by a dot or minute spot only.” (Figs, e, e 1 , e 2 .) 
Chrysalis. — Length .85, breadth .09, greatest depth .11 inch; compressed 
laterally, the thorax prominent, abdomen tapering, mesonotum rounded, head 
case pointed; color of anterior part and of wing cases dark green, of abdo¬ 
men yellow-green ; a light huff stripe on either side of abdomen from the end 
of wing cases to extremity, and on the ventral side of this stripe, a demi-band 
of dark brown ; between the stripe and band three black dots, one on each seg¬ 
ment ; on the wing cases there is a submarginal row of black dots, one on each 
interspace, and on middle of the disk is a small black spot. (Fig./.) Duration of 
this stage in September fifteen days. Of the later brood the periods varied, the 
