| 
Dates in 1893. 
Professor E. B. Poulton on colour-relation 
I. 
Black twigs of 
Turkish oak. 
Il. 
Deep blue paper 
spills. 
IIT. 
Dark purplish-brown | 
glossy twigs probably | 
of birch. 
Dy. 
White-spotted 
purplish-brown twigs 
of birch. 
July 15. 
(W. Holland. ) 
All, 
15 on twigs. 
very black. 
July 18. 
(W. Holland.) 
July 23. 
W, Holland.) 
As before. 
As before. 
| 
10 on spills, 2 
/on green. All very 
“dark. 
“_ 
As before, 
Some mature 
and spinning up. 
14 on twigs, 1 
on green. All very 
dark purplish- 
brown. 
12 on twigs, 4 
on green, Colour 
darkish brown but 
distinetly paler 
than III. 
As before. 
As before, 
As before. 
As before. 
\ = 
| 
July 27. 
Careful com- 
Some pupating. | 
All black, but one 
6 larve remain, 
nearly mature. All 
parison has very faint very dark purplish, 
(EK. B. P.) | traces of green on almost black, as 
| sides anteriorly. /on many previous 
‘These larve) occasions. 
| ‘blacker and less 
| purple than those 
with blue _ spills 
(UH). 
| July 28. 8 larve still| 5 still feeding. 
(W. Holland.) | feeding. All on) 4 on spills, 1 on 
_twigs. leaf. 
Allavery uniform 
dark purplish- 
brown, almost 
black, but not so 
much so as those 
All dark greyish- 
brown and very 
uniform. 
with 
spills. 
the 
blue 
9 still feeding; | 
12 still feeding : 
all on  twigs.jall on twigs. 
(July 30.) A\ (July 30.) A 
typical larva;typical larva 
painted ; shown in | _ painted ; shown in 
Plate XVI, fig. 3 | Plate XVI, fe. 4, 
Aug. 3. | (July 31.) \ A] 5 still feeding. 6 feeding. All 
(W. Holland.) |typical larva 4 on twigs, 1 on on twigs. 
| | painted ; shown in green. 
| Plate XVI, fig. 1. 
| (Aug. 4.) Re-fed. | 
(Aug. 8. Re-fed. One or | As before. All5, 5 feeding: all 
W. Holland.) | two still feeding. | on twigs. 'on twigs. Colour 
as before. (Aug. 
19.) 3 still feed- 
ing. 
