144 Psyche [October 
boscis against it for a short while as if to drink, then running over 
it and going again on the plate. Attempting to escape, it was 
repeatedly driven back by the approaching hand. I noticed that 
my hands were rather warm. In fact, it did not stop when ap- 
proached by my wife’s hand which was cooler, and on which the 
insect would continue to run. 
The specimen was kept alive and a cage constructed el 
permitted its observation. The cage consisted of a glass tray, 
t Open door (cold J. 
| Inner Side 
of Prazzxa (warm). 
Fig. 1. Observation cage used in experiments with Chionea: a, general view 
of cage; b, same seen from above; #, habitual resting place of Chionea. 
about one and one-half feet long, covered entirely with two glass 
covers, which could be replaced, wholly or in part, by wire-netting. 
After some experimenting, it was preferred to cover the whole 
with wire-netting, and in addition to this, to cover the short sides 
of the tray with the two pieces of glass, leaving an open space in 
the middle, covered only by wire-netting, as seen in the figures. 
The tray was, at first, half filled with sifted earth and half with 
snow in order to ascertain whether the insect would show a pref- 
erence for one of these. It seemed equally at home on both and 
observations tended to show that Chionea is a true snow-insect, 
not a mere accidental one, as has been supposed by Emerton (see 
Johnson, Psycun, 1912, p. 102), and as all the other insects quoted 
above undoubtedly are. 
The Chionea was placed on the border-line between snow and 
