378 Dr. Wallace on the Ouk-feeding 
the hump being the highest point ; they seemed vigorous and well 
but very quiet, their movement being very slow and deliberate: 
I began therefore to feel relieved in my mind of the anxiety which 
I had felt on account of their having eaten so little, and to con- 
sider that this spare diet was perhaps natural to them, in conse- 
quence of the sparseness of foliage on the trees at the present 
time; temperature out of doors at 5 p.m. 48°, indoors upstairs 
55°; in the fields and lanes the oak leaves are now 1 inch long. 
April 30th. Minimum temperature during night upstairs 50°; 
weather cold, wind N.E. Sunshiny morning, at 8 a.m. temperature 
75° in room, the eggs and thermometer being in the sunshine 
daily for about an hour from 8—9 a.m.; at 10 a.m. temperature 
65°. I placed oak sprays gathered from the hedges, having leaves 
1 inch Jong, in water for the larva, using the feeding apparatus 
before described ; one larva was observed to feed, the other larvee 
had eaten during the night; they were more lively in the sunshine. 
May ist. Minimum temperature during night 50, at 8 a.m. 52°; 
cold day, no sun, rainy, wind N.E,; no eggs hatched; larve fed 
in morning; frass ejected. ; 
May 2nd. Mimimum temperature during night 50°, at 8 a.m. 
52°; wind gentle, N.W., warmer, but weather dull and rainy: 
the larva had fed and were thriving, but the one Jarva which 
emerged from Mons. Personnat’s eggs seemed to get smaller and 
ate very little; the frass was hard and remained attached to the anus, 
it was removed by means of a stiff badger’s-hair brush ; the re- 
fraicheur used freely. 
May 3rd. Minimum temperature during night 50°, in sunshine 
at 8 a.m. 60°: the larve fed better, emitted more frass, and 
evidently grew larger. I placed the five young larve on an 
oak tree about four feet high in a pot which had been forced 
under glass : the upper buds were not all unfolded, and the leaves 
were not fully expanded: I considered it therefore to be in a 
state suitable to the young larvae; they settled well upon it; the 
refraicheur was freely used. 
May 4th. Wind gentle, warm, W., pleasant sunshiny morning ; 
minimum temperature in night 50°, at 8 a.m. 75° in sunshine, in 
shade 62°, at 11 a.m. 55°.* The Jarvee fed during the night, the 
refraicheur used freely : three larvae emerged in the early morning, 
two from No. 3, which had been treated with liq. potassee, and 
one from No. 1 (Mons. G. Méneville’s) ; these larvee seemed to be 
as large as or even larger than two of the five larvee which had been 
* These temperatures are those of the room in which the larye were 
feeding. 
