Geographical Variation of Z. loti= 
transalpina : 
Geotrupes and Sparrows 
Glacial fauna F 
-Graduated emergence sé 
Gregarious habit, of P. demoleus.. 
Gynandromorphs of, E. cardamines, 
9; G. rhamni,9; C. edusa, 9; 
H, semele, 9; A. coridon, 34, 42; 
A. thetis, 34; P. icarus, 34; P. 
aegon, 34, 43, List of, 37; C. 
argiolus, 42; G. in study of 
insect life, 58; P. turnus, 170; 
H. marginaria, 173; P. rapae, 
215; MW. floricola, 217; Recent, 
ants : 
Hibernation of, Beetles, ile flies ae 
High-mountain characteristics 
‘¢ Hill’? Musenm, The 
Isolated Colonies of Butterflies 
Latitude and emergence .. 
‘« Vepidopterist Abroad, The ”’ 
Life-history of, C. distincta, 3; G. 
viridula, 206; G. clecpatra 
List of Officers and Council, Lanca- 
shire and Cheshire Soe.. 
Literature of, Phoresy, 185; Gynan- 
dromorph of Ants : 
Marriage flight of WM. gr aminicola.. 
Melanic R. phlaeas, 6; O. awtwmn- 
ania, 20; DD. mabe. i@ pis 12% 
pedaria  . 
Meteorological Records in Entomo- 
logy é 
Migration of Catopsilias, 203 ; - 2 of 
Ars crataegt 
Mimiery, in Charaxes sps. a 124; 
Sees ova Fly, 171; 
butterflies . = : 
Mosquitoes 
Mullerian Association of Ants and 
Beetles Re 
Myrmecophilous Lady ‘Bird, C. 
distincta, The .. zt; be 
Newspaper entomology ae 3 
New species and forms 84, 160, 
162, 168, 169, 170, 177, 180, 
Nomenclature of Z. lott=transal- 
pina, 28; P. fasciana, 35; L. 
pygarga (fuscula). . ; 
Notes, Entomological, from Putney, 
37; on Lepidoptera from Witley, 
57, 89, 110; on A. reticulata, 93; 
from Palestine, 130; on M. arge 
Obituary, William West (of Green- 
wich), 175; Dr. Gordon Hewett, 
170; John pee 194; A. BE. 
Hudd 
Occurrence of ‘8. pruné in Surrey. 
Ontogenetic races ee 
Indian 
Locanities :—Arquata, 14, 59; 
Amelie-les-Bains, 
Belgium, 71; Barton Mills, 153, 199; Bristol, 
Calabria, 25; Constantinople, 105 ; Ceylon, 124 ; Dorking, 36 ; 
36 ; 
157; 
Boxe Eillhaeobr 
Bangalore, 200 ; 
Edin- 
INDEX. 235 
PAGE | PAGE 
Original description of, A. reticu- 
28 lata, 94; larva of P. latirostris.. 157 
63. | Paired butterflies in flight .. 218 
69 | Palatability of Vanessid Larvee 59 
65 | Parasitism, Unusual case of 64 
202 | ‘‘ Phoresy of a at 181 
Phylogenetic races .. 7 
Preponderance of one sex .. 191 
Prices, of Webb Collection, 8, 33; 
Record 5 ‘ 10, 33 
Pupation of Zygaena 83 
Races of, Z. transalpina, 30, 104 ; 
Z. iv ifolii, 38, 190; Swiss Hes- 
perids, 50 ; Flatidae, 104; Sum- 
mary of, showing seasonal varia- 
217 tion in Italy, 150; Z. rhada- 
103 manthus, 158; Z. trifoti, 167 ; 
69 Ties theophrastus . 204 
166 | Ramble in Mansfield Wood 209 
5 | Review: ‘‘ Proceed. S. Lond. Ent. 
107 Soe., 1918, 23; ditto, 1919 = 232 
189 | Revisional Notes ‘(Lep. Vitae Wee: .. 85 
Rhopalocera of the Bangalore 
227 district 7, .. 200 
Scarcity, of spring larvae oo so Slt 
44 | School of Tropical Medicine . 174 
Scientific Notes and Observations 
218 58, 209 
13 | Seasonal, Polymorphism in HKuro- 
pean Rhopalocera, 3, 140; Notes 213 
Societies, S. London Ent. Soce., 21, 
123 42, 64, 84, 121, 172, 195, 213; 
Lancashire and Cheshire Ent S8., 
172 22, 44, 122, 174; The Entomo- 
logical Soziety, 103, 123, 171, 211, 213 
231 | Statistics of Z. transalpina in Italy 27 
‘Stealing of the Common, from — 
the Goose”’ 83 
200 | Suppressed second and third broods 
175 5 {Or 
Synopsis of Z. oxytropis races 162 
1 | ‘* Tentamen,’’ Hiibner’s Tks) = 1 
Termites, Nearctic .. 194 
1 Trigenerate species, Emergence of 66 
83 | Two years in pupa, N. typhae 21 
Variation in, European butterflies, 
187 3, 140; A. grossulariata, 173; A. 
urticae, 21; N. sxanthographa, 
22; Z. transalpina (loti), 28; 
36 British lepidoptera, 8, 33; B. 
perla, 44; Genus Hesperia, 45: 
A. reticulata (contaminana), 93; 
A. coridon, 140; A. thelis, 143 ; 
191 J2y brassicae, etc., 169; H. 
penis .. 214 
Variety = : elon 
Verrall ee che . 41 
. 216 | Zygaena loti v. Z. transalpina, 76; 
40 4. rhadamanthus and races of Z. 
7 oxytropis . 158 
