C WG") [ci, civ, cv 
butterflies were distributed as follows:—Two were on the 
under-sides of leaves of the broad-leaved sallow; two on 
bramble leaves (one hanging from the under-side, and the 
other sitting on an under-side which happened to be turned 
uppermost) ; the fifth was found hanging from the under-side 
of a leaf on a birch bush. The under surface of all these 
leaves is very pale as compared with the upper surface. 
These facts seem to me to strengthen the opinion expressed 
in my former notes (vide ‘‘ Proc, Ent. Soc. Lond.” 1904, p. Ixxv, 
and 1905, pp. Ixxiii, Ixxiv) that Pieris rapx does select for 
prolonged rest a site adapted to promote concealment.” 
Papers. 
‘‘A Permanent Record of British Moths in their Natural 
Attitudes of Rest,’ by Mr. A. H. Hamm, Assistant in the 
Hope Department of Zoology in the Oxford University 
Museum, communicated by Professor E. B. Pouron, F.R.S. 
“Studies of the Blattide,” by R. Suetrorp, M.A., F.LS. 
Wednesday, December 5th, 1906. 
Dr. F. A. Dixny exhibited specimens of Zeracolus omphale, 
Godt., bred and captured at Salisbury, Mashonaland, by Mr. 
G. A. K. Marshall, F.Z.S. The exhibit was intended to show 
the effect of subjecting the insects during their immature 
stages to abnormal conditions of temperature and humidity. 
He pointed out that the members of a brood which had been 
reared under ordinary conditions as larve, but had been ex- 
posed as pupze to damp heat, showed on emergence little or no 
difference from those examples that had been reared under 
normal conditions throughout. The emergences took place in 
June 1905, and the resulting butterflies were of the usual 
dry-season phase, though less markedly dry-season than a pair 
captured in the field at the same date. 
On the other hand, several examples, belonging to one 
brood, had been brought up as larve in an atmosphere of damp 
heat, from which they were removed on pupation into natural 
conditions. The resulting butterflies, emerging in July during 
