Professor E. B. Poulton on 
r I. 
Dates in 1893. Black twigs of Deep blue paper 
Turkish oak. spills. 
colour-relation 
White- spotted 
purplish-brown twigs 
of birch. 
TIT. 
| Dark purplish-brown 
glossy twi igs probably | 
of birch. 
| May 22 15 Young larve; (May 238.) 15) 
| (E. B. P.) | introduced. | young 
| troduced. 
June 11. (June 9.) Re-fed. | 12 larve counted; 
] 
15 larve in-) 16 young larve 
larve in-/troduced (just introduced. 
hatched). 
(June 16). All| 15 counted. 
(E. B. P.) Pees very | 15 dark like the | 
dark. twigs, but not, 
markedly purplish. | 
June19. | (June 17.) All} All 12 very| All15on ae 12 larve on 
(E. B. P.) 15 very black like dark. very dark and! twigs, 4 on green. 
the twigs. purplish, |All dark, but 
| greyer than those 
in III, and not so 
dark as latter. 
x |e = “2 ee ee 
June 25. | lane 22.) As| As before. All | 
(E. B. P.) before. All at rest | on spills, 
| on twigs. 
| 
| 
panic 7 xa, i ae ae TGS EEICT a — 
July 1. As before: all (June 27.) All| (June 27.) Re-fed. 
| (E. B. P.) jon twigs. (15 dark brown. | 
} } } | 
| | be | 
July 6. 2 at rest on) 9on spills, 1 on | All 15 on twigs. | 18 on twigs, 3| 
Careful com- | green, 13 on twigs. green, 2 not noted. | All very dark. ‘on green. Dark, | 
parison on | All 12 of a uniform 
white paper. 
All very black. 
dark purplish: | 
but “much lighter 
/and less constant 
than III. | 
(E. B. P.) black. 
| 
| ly : 2 at rest on| 8 on spills, 4 on | 
| (W. Holland.) | green, 13 on twigs. | green. All very | 
All very black. dark. 
July12. | 
(W. Holland.) | 
= : 
15 on twigs. |} 9 on spills, 3 on 
| ereen. 
aa 
14 on twigs, 1) 15 on twigs, 1) 
ongreen. Alldark on green. The 
purplish-brown, (larve remain 
lighter in tint 
than III. 
13 on twigs, 2 
on green, 
13 on twigs, 3 
on leaves. 
