PN DE xX 
abnormal specimens, 149 
affection of humble-bee for her brood, 
30, 103, 116, 233, 269 
agrorum, Bombus, 36, 42, 43, 44, 
53, 68, 104, 148, 193 
antenna-cleaner, 10 
antenne, 8, 144, 145 
function of, 8, 62 
joints of, in males, 146 
anger of queen, 228, 245 
of workers, 8, 51, 90, 199, 245, 254 
Antherophagus, 78 
Anthophora, 143 
ants, 116, 129, 228 
Afpathus, see Psithyrus 
Aphomia sociella, 73, 277 
arcticus, variety of Bombus agrorum, 
194 
argillaceus, variety of Bombus ruder- 
atus, 49, 177 
armature, 144, 146, 222 
of each species, 271 (Plate VI.) 
association between strange species, 
57» 133, 136, 265, 275 
auricle, 21-24, 17I, 203 
badgers, 81 
barbutellus, Psithyrus, 69, 70, 72, 
214 
beetles in humble-bees’ nests, 18 
Bingham, C. T., on the wing-hooks, g 
birds destructive to humble-bees, 81, 
115 
bluebells, experiment with, 267 
Bombi, divisions of the British, 153 
Bombus, derivation of name, 4 
life-history of, 12 
Bombylius, 144 
Brachycoma devia, 75, 127, 277 
breathing apparatus, 11 
breeding by selection, 142 
specimens, 223 
Brightwen, Mrs. E., v 
Brown-banded Carder-bee, 195 
279 

buzzing, how produced, 11 
to express anger and alarm, 8, 116, 
138, 243, 252 
to express jealousy, 233, 235 
to express pleasure, 230 
campestris, Psithyrus, 68, 70, 72, 
147, 216 
canariensis, variety of Bombus terrestris, 
T$9 
Carder-bees, 17, 41, 152 
caterpillars in humble-bees’ nests, 73, 
ceiling, waxen, of nests, 45, 243 
centipedes, 120, 226 
cheeks, 145 
cleaning process, 268 
clipping the queen’s wings, 103, 266 
coat, see hair. 
cocoons, 29 
bitten down, 40 
first cluster of, 29, 33 
later clusters of, 35 
of different species, 36, 155, 159, 
181, 185, 190, 199 
of Psithyrus, 69 
collecting specimens, 220 
colonies at night, 47, 99 
feeding, 123 
colours, fading of, 148, 223 
comb of humble-bee, 44 
common carder-bee, 103 
confinement, getting queens to breed 
in, 130 
keeping colonies in, 126 
confusus, Bombus, 24 
Conops, 78 
corbicula, or pollen-basket, 20-24, 274 
corsicus, variety of Bombus ruderatus, 
178 
cover, Sladen's, for domiciles, tog 
covered way to surface nest, 47 
Cryptophagus, 78 
cullumanus, Bombus, 153, 171 
