season, there were about two hundred found placed within a
small area. One cell was dug up, but it contained no pollen. Four days
later, several Andrenas were noticed resting from their toil at the
opening of their burrows. On the 28th of May, in unearthing six holes,
eight cells were found to contain pollen, and in two of them a small
larva. The pellets of pollen are about the size of a small pea. They are
hard and round at first, before the young has hatched, but as the larva
grows, the mass becomes softer and more pasty, so that the larva buries
its head in the mass, and greedily sucks it in. When is the pollen
gathered by the bee and kneaded into the pellet-like mass? On July 4th,
a cell was opened in which was a bee busily engaged preparing the
pollen, which was loosely and irregularly piled up, while there was a
larva in an adjoining cell nearly half an inch long. It would seem,
then, that the bee comes in from the fields laden with her stores of
pollen, which she elaborates into bee bread within her cell.

When the bee returns to her cell she does not directly fly towards the
entrance, since, as was noticed in a particular instance, she flew about
for a long time in all directions without any apparent aim, until she
finally settled near the hole, and walked into her subterranean retreat.
On a rainy day, May 24th, our friend visited the colony, but found no
bees flying about the holes. The little hillocks had been beaten down by
the pitiless raindrops, and all traces of their industry effaced. On
digging down, several bees were found, indicating that on rainy days
they seek the shelter of their holes, and do not take refuge under
leaves of the plants they frequent.

On the 29th of June, six full-grown larvae were exhumed, and one, about
half grown. On the 20th of July, the colony seemed well organized, as,
on laying open a burrow at the depth of six inches, he began to find
cells. The upper ones, to the number of a dozen, were deserted and
filled with earth and grass roots, and had evidently been built and used
during the previous year. Below these were eight cells placed around the
main vertical gallery, reaching down to the depth of thirteen inches,
and all containing nearly full-grown larvae of the bees, or else those of
some parasitic bee (Nomada) which had devoured the food prepared for the
young Andrena.

About the first of August the larva transforms to a pupa or chrysalis,
as at this time two pupae were