8 Proceedings of the Royal Physical Society. 
surface was raked over, till a few grains of loose sand alone marked the 
spot. After a pause another ovi-position was made in the same careful 
and deliberate manner. 
THE Kaa. 
The eggs are 2 mm. in length, oval, yellowish when first laid, with smooth 
surface. When first deposited the eggs are coated with a viscid substance 
that makes them adhere more or less to the earth, sand or peat in which 
they are deposited. As the eggs mature they become white and somewhat 
swollen. Still riper eggs exhibit the two pairs of eyes of the larva, clearly 
seen through the egg-membrane. In a clod of very adhesive sand that 
was examined, the eggs and newly-hatched larve were found each at the 
bottom of a pit 4 or 5 mm. in depth, of which the sides were quite firm, 
though loose sand filled in the top. However, eggs experimentally buried in 
a new place hatched in due time, and the emerging grubs fashioned their 
burrows as easily as those hatched from undisturbed eggs. 
THE YOUNG LARVA. 
ges had been laid in the sandy floor of a small breeding-cage between 
12th and 20th June. The cage was kept under constant observation, and 
the sand was daily watered, and freely exposed to the sun. The first larva 
appeared on 11th July, and the rest of the eggs continued to hatch-out 
successively through the remainder of July. Newly-hatched larve are 
quite white save for the eyes, and adhering to them may be seen the cast- 
off egge-membrane. One that was watched darkened in little over an hour. 
Beginning at the antenne the colour spread from the anterior to the 
posterior end of the body. In structure a newly-hatched larva resembles a 
grown one, except that the abdomen is unextended. As the small wooden 
breeding-cage did not contain much depth of sand, the little grubs were, 
after about a fortnight, gently dislodged from their burrows, and sixteen 
of them were successfully transferred to a wide flower-pot filled with sand. 
This was done because young larvee very soon increase the depth of their 
burrows. A grub of 5 mm. in length may have a burrow 14 inch deep. 
Other eggs were hatching-out in the peats contained in the large breeding- 
cage, Further, a visit to Argyllshire made at this time (July 1914) showed 
that the sandy bank which a month before had been searched almost in 
vain for the larval burrows of Cicindela, now exhibited numbers of minute 
burrows containing larve measuring 3 to 5 mm. in length. On the sand- 
dykes and on the hill paths it was the same. Everywhere, where in 1912, 
1913 and 1914 half-grown or large larve had first abounded and later dis- 
appeared, numberless little burrows could now be found. 
