103 
is foiind a calcareiis ring, serving the purpose of keepiug the honev 
quiet during the first raovements of the larva, so that its spiracula 
inay not be cloyged with honey and the larva thus die from suffo- 
cation The calcareus substance is secreted from the large giand 
situated in the abdomen under the intestinal canal. 
Fodalirius furcatus Pz. The nests are found in branches 
blown down from trees and also in wooden posts. They nearly 
always consist of two, three or four parallel burrows down through 
the wood. The cells are enlarged parts of the burrow. At the 
bottom the jug is made of wood dust, which the bee takes from 
the part immediately above, thus widening the burrow here to make 
room for another cell. The bee has, therefore. alwavs tw^o cells in 
hånd, one in which the jug is being built of the material excavated 
from the other next above it. 
The last jug is built of material which the bee takes from 
the sides of the burrow, just inside the entrance, and this explains 
the considerable widening, which is always found there. 
Fodalirius vulpinus Panz. builds its nests in clay walls. The 
burrow is closed by a disc of clay V 2 Centimetre from the entrance. 
Eucera longicornis L. digs a burrow into the earth, from 
which lateral burrows issue, one cell being made in each of these. 
Two females have been found building one nest. 
Megachile lagopoda L. builds its nests in the burroAVS of the 
71orcw5-larva and formes its cells of pieces of beech-leaves. 
C This has been first shown in the case of Fodalirius garietinus by 
Dr. Wesenberg-Lund. 
