282 
Psithyrus, attacked by workers, 64, 
254, 276, 277 
how distinguished from Bomédus, 203 
how excluded from domiciles, 127 
life-history of, 59, 276, 277 
males of, 72 
origin of, 71 
pronunciation and 
name, 4 
seen laying her eggs, 258, 276, 277 
pupee, 28, 31 
derivation of 
quadricolor, Psithyrus, 68, 218 
queen, charmed life of, 115, 230 
death of old, 54 
defending her eggs, 51, 247 
development of, 50, 275 
effect of loss of, 241 
excessive variation in, 148 
how distinguished, 144 
interceptor, 100, 236 
larva of, 50 
laying eggs, 246, 248, 276 
lifeof, 3, 12 
loss of duelling instinct in, 263 
searching for nest, 17, 18, 277 
queens, attracted to occupy artificial 
nest, 104 
breeding in confinement, 130, 259, 
276, 277 
placed in empty nests, 136 
ratellus, Bombus, see derhamellus 
rain, sheltering from, 268 
red clover, 7, 224 
Red-shanked Carder-bee, 189 
regional convergence, 148 
ruderatus, Bombus, 7, 43, 45, 49, 
LOZ GO Leo; wLI7 la Az 
149, 173, 275 
colour dimorphism in, 176 
rupestris, Psithyrus, 60, 127, 206, 
25027 Ome efi 
life-history of, 61, 276, 277 
mournful cry of, 252, 277 
sanitary arrangements in observation 
nests, 92, 96 
satellite queens, 57, 66, 242 
Saunders, Edward, v, 14, 151, 176 
on tomtits eating humble-bees, 81 
scape, 144 
scent emitted by male humble-bee, 13, 
72 
scrimshiranus, Bombus, see jonellus 
Sedgwick, Prof. A., on Spherularia 
bombi, 80 
setting specimens, 222 
Shakespeare, 82 
Short-haired Humble-bee, 182 

THE HUMBLE-BEE 
shrews, 81, 119 
protection from, 119, 129 
shrike, 81 
Shrill Carder-bee, 191 
sight of humble-bees, 8, 226, 227, 
239, 266 
Sladen wooden covers for domiciles, 109 
Sladeni, variety of Bombus muscorum, 
197 
sleep of humble-bee, 268 
slugs, III, 226 
Small Earth Humble-bee, 160 
Small Garden Humble-bee, 179 
smell, sense of, 8, 13, 56, 62) x23) 
237, 264 
Smith, F., 151, 188 
smithianus, variety of Bombus mus- 
corum, 200 
soroénsis, Bombus, 153, 162, 219, 275 
species, closely related, 149 
how distinguished, 143 
table of the British, 152 
Spherularia bombi, 79 
spiracles, 11 
starvation, 116, 123, 134, 231 
sting, 144 
of B. terrestris and B. lucorum, 72 
of Psithyrus, 62 
stings, effect of, 91 
risk of receiving, 89 
Stone Humble-bee, 154 
subterraneus, Bombus, of Linnzeus, see 
latreillellus 
of Smith, see ruderatus 
surface-nesting species, 17, 47, 153 
swallows, 81 
sylvarum, Bombus, 36, 90, 130, 150, 
191 
tail, 145 
used in steering, 227 
tarsi, 145 
temper of different species, 89, 90, 101, 
161, 166, 196 
terra-cotta domicile, 128 
terrestris, Bombus, 7, 8, 14, 16, 27, 
30, 34, 36, 37, 38, 40, 45, 50, 
52, 53) 55> 57, 63, 64, 69, 72, 
80, LOL, 107, 127; 13%, D387 eagn 
T4090, 158, 16x; cog; (292neeRn, 
257, 259, 262, 264, 268, 27a) 
274, 275 
domestication of, 131, 137, 259 
tibia, 145 
time occupied in egg, larva, and pupa 
stages, 27, 29, 31 
tin domiciles, 112, 128 
tit, the great, 81 
tongue of humble-bee, 7, 11, 145, 178, 
181 
