Xxvi] ( Ld ) 
mander WaLKkER said he had climbed to the top of Croagh 
Patrick, a very isolated mountain in County Mayo about 
2500 feet high early in the year, and found a number of 
Coleoptera there as well as Calocampa vetusta hibernating. Mr. 
Cutty drew attention to a paper on beetles recently published 
by the Director of the observatory on the summit of Ben Nevis, 
who attributed the presence of insects there to storms of wind. 
Mr. Cuampion said that in the case of Dorcadion sp. on Mon- 
eayo in North Spain which he found running about there on 
the tops, as they were wingless, this could not be the cause of 
their presence, while he had found ladybirds under the snow. 
Colonel YERBuRY mentioned the case of the Warble Fly, which 
will always fly up to elevated ground to pair, so that the 
plan recommended by Miss Ormerod and other eccnomic 
entomologists of smearing the pastures with preventive mixtures 
was absurd, since the insect brings down its young with it, and 
does not breed in the low levels. Colonel SwinHor supposed 
the swarming to be due to atmospheric conditions, and instanced 
the remarkable fact that all game will always fly up rather 
than down hill. Dr, Dixzy had observed great quantities of 
butterflies on an exposed and conspicuous ridge which ran out 
from the cliffs at Morthoe, N. Devon, chiefly Satyrids and 
“ Blues,” while Mr. RowLanp-Brown mentioned the many 
insects to be found at high alpine elevations, notably on 
the Besso (12,055 feet), near Zinal, where he had observed 
many small flies, and not far from the summit individuals 
of Lrebia glacialis, attracted and drawn upward in his opinion 
by the warm upward currents of air from the valleys and 
lower slopes. Mr. Turr supported the theory of insects seeking 
high and exposed localities for breeding purposes, and agreed 
with the view that hill-tops were the best places for assembling. 
Colonel Bincuam, the Rev. F. D. Moricz, Mr. DonistHorre, 
and other Fellows joined in the discussion. 
The Prestpent in reply thanked the Fellows for the many 
interesting facts which had been suggested bearing upon his 
hypothesis. With regard to Dorcadion he felt confident that 
the numbers on the conspicuous rock had not all been breil 
there, and that therefore there had been an instinct to crawl 
upwards from lower elevations. In this way, if the insects 
