INDEX. 
SIG 
Gryllus, 231; on robbery among 
Polistes, 286 
Sight, how far ants are guided by, 
251, 258, 266, 270 
Signals given by ants, 158 
Slave-holding, structural changes 
induced by, 82; degradation 
caused by, 89 
Slave-making ants, 18 ; expedition 
of, 81 
Slavery among ants, origin of, 79; 
degrading tendency of, 82-89 
Smell of Myrmecina possibly pro- 
tective, 17; on recognition 
among ants by, 127; sense of, 
among ants, 233; the probable 
means of recognition among 
bees, 281 ; sense of, keen among 
bees, 288 
Snake killed by Driver ants, 64 
Soldiers among ants, 20; those of 
Saiiba do not fight, 22; their 
origin, 22 
Solenopsis fugax, the eye in, 11; 
the enemy of its hosts, 78 
Solomon on the foresight of the 
ant, 59, 60 
Sound, apparent insensibility of 
ants to, 222; possible existence 
of, beyond human auditory 
range, 223, 233; how produced 
by Mutilla, 229; apparent in- 
sensibility of bees to, 290 
Specialisation of form in flowers 
correlated with colour, 308 
Spectrum, experiments as to per- 
ception of, by ants, 198 
Spiders, their intelligence in es- 
caping the Hcitons, 66 ; mimick- 
ing ants, 66 
Spiracles of ant, position of, 12, 14 
Stenamma Woodwardii, the eye in, 
11; found exclusively in nests 
of Formica, 78 
Stethoscope like organs in antenna 
of ant, 228 
Sting in ants, possible correlation 
of, with form of knot, 13; pro- 
bable common origin of, in ants, 
447 
TYN 
becs, and wasps, 14; atrophied 
condition of, in Kormica, 15; the 
loss of, fatal to bees, 283 
Strangers, behaviour of ants to- 
wards, 104, 109, 119, 333 
Stridulating apparatus in Mutilla, 
229; in ants, 230 
Strongylognathus Hubderi, its mode 
of slave-making, 84 
— testaceus, the eye in, 11; slave- 
holders in spite of their feeble- 
ness, 84; their degradation, 87, 
89 
Sulphate of quinine, experiment 
with, as to ant vision, 216 
Surgical use of ant heads in Bra- 
zil, 96 
Sykes, Mr., quoted as to seed- 
collecting ants, 60 
AME wasp, behaviour of 3, 315 
Tapinoma, length of period cf 
larval life in, 7 
— erraticum, the eye in, 11; sheir 
agility, 24; Aeierius in nests 
of, 77 
Teazle, possible uses of leaf-cup 
in, 52 
Tetramorium easpitum, the eye in, 
1l; feigns death as a defence, 
17; alleged greediness of, 27; 
enslaved by Strongylognathus, 
84; entire dependence of Aner- 
gates upon, 85 
Texas, harvesting ants in, 61 
Thiasophila angulata in ants’ nests, 
77 
Thorax of ant described, 12 
Tibia of Gryllus, sense organ in, 
231; of Lasius, 232; of Locus- 
tid@, 233 
Tomognathus sublevis, only 
workers of, known, 87 note 
Tracks of ants illustrated, 251-257 
Tuning-forks, experiments with, 
222 
Tunnels formed by ants, 25 
Tyndall, Professor, experiment 
