257 



Asymmetrical Agriades coridon, 

 240 ; Bird-louse, 190 ; Cupido 

 minimus, 216 ; Mimas tiliae . . 88 

 Attitudes of Wasps and Psocids in 

 copulation . . . . . . . . 231 



Barnes and McDunnough'a Check- 

 List ..219 



Bibliography of Pieris napi, its 



forms and close allies . . 39, 73 

 Bilharziosis . . . . . . . . 221 



Birds and Insects 5, 15, 33, 54, 76, 



121, 140, 145, 195 



Blattodea 46 



Breeding, Apleeta 7iehulosa, Experi- 

 ments in, 67 ; the House-Fly . . 225 

 Breeding Cage for Geotrupes ■ ■ 89 

 Brenthis pales, its history and 



named forms . . . . 101, 129 

 British Cecidomyidae, New and 



Bare 206, 228 



British Psycliides, The 69, 104, 



111, 155 

 Broods of P. aegeria var. egerides, 

 203 ; A. coridon and A. arago- 

 nensis .. .. .. .. 242 



Butterflies drinking.. 184,187, 212 

 Butterflies in North Yorks. . . . 255 



Galigo, New Sub-species of . . 180 



Carrying Habits in Paired Butter- 

 flies . . . . 16, 161, 166, 246 



Cases of British Psychides 70, 104, 



111, 155, 216 

 Cecidomyid Galls . . 12, 18, 206, 228 

 Check-List of the Lepidoptera of 

 Boreal America . . . . . . 219 



Coccid, New, from Costa Kica, 109 ; 

 New British . . . . 194, 238 



Coleophoridae, Notes on the . . 150 



Coleoptera 63, 67, 174, 175, 187, 



192, 193, 194, 214, 216, 223, 224, 

 237 ; at Wood Walton Fen, 52 ; 

 Coccinellid larvffi, 107 ; in the 

 Worthing district, 226 ; Life his- 

 tory of Hylastes cunicularius, 109 ; 

 Tapping of death-watch beetles, 



193, 194; Teratology, 20, 62; 

 with Ants 32, 50 



Colias edusa in 1917 . . . . 247 



Collections — Boisduval, 42 ; Gibbs, 

 136 ; Waterhouse, 19 ; Wolley 



Dod - 191 



Coloration Problem, The 5, 33, 54, 



76, 121, 145 

 Colour Patterns in Spiders. . . . 61 

 Copulation of A. coridon, P. icarus, 

 and A. thetis, 212 ; Wasps and 



Psocids 231 



Corrections 104, 129 



Cossidae, History and Grouping 



of the 4 



Current Notes and Short Notices, 



18, 41, 60, 86, 134, 172, 187, 213, 237 

 Dates and Records . . . . . . 235 



Dates of Appearance . . 85, 244 



Dawn, Insects at .. .. ,. 193 



PAGE 



Death-feigning Instinct, The . . 191 

 Death-watch Beetles, Tapping of 



193, 194 

 Dermaptera . . . . . . 19, 25, 46 



Description of Abraxas grossulariata 

 var. alhovarleyata, 136; Argyn- 

 nis cydippe (ab.), 183, 211 ; 

 Brenthis pales (vars.), 101, 129; 

 Caligo, new sub-species, 180 ; 

 Goleophora lutipennella (larval 

 case), 152 ; G . paripennella (larval 

 case), 150; Dolichoderus craio- 

 leyi, 201 ; Erebia zapateri (ovum 

 and larva), 152 and 153; Myr- 

 mica laevinodis (ergatandromorph) 

 31 ; M. schencki (male), 32 ; 

 Polygonia c-album ab. cloqueti, 

 135; Trifiircula imviundella(o-vum 

 and larva) . . . . . . . . 117 



Diptera 65, 108, 111, 193, 221, 225, 238 

 Disappearing Lepidoptera 42, 217, 218 

 Distinction between A. coridon and 

 A. aragonensis .. .. .. 241 



Dolichoderus, Notes on the genus. . 201 

 Dolichoderus crawleyi, n. sp. . . 201 



Drinking by Butterflies 184, 187, 212 

 Drosophila, Sex-linked Inheritance 



in .. ..196 



Durrant, Mr. J. H., joins Editorial 



Staff 241 



Earwig, Life-History of the 25, 177 



Eastern Counties, Notes from the. . 213 

 Economic Entomology 19, 108, 109, 

 134, 135, 172, 173, 174, 188, 189, 



214, 225, 237, 238, 239 

 Ectoparasites . . . . . . 137 



Editorial 241 



Egg-laying of Rumicia phlaeas . . 58 

 Entomological Notes from Egypt 

 and Palestine . . . . . . 221 



Erebia zapateri. Notes on early 

 stages, etc., of .. .. .. 152 



Eupitheciids, the larvae of . . . . 212 



Fauna of Raasay Island, 60 ; Urmi 

 district . . . . . . . . 61 



Field Notes from Bath 166, 185, 

 234; from Netley in 1917, 232; 

 from Salonika . . . . . . 45 



Flying Habits of Paired Butterflies 246 

 Food-plant of Erastria fasciata, 

 254; Gortynaochracea .. .. 183 



Further Notes on the Earwig . . 177 

 Galls, new British Plant- 12,18, 96, 



126, 206, 228 

 Genera of fossil ants . . . . 113 



Genitalia of Gidaris otregiata, 218 ; 

 Euplexia lucipara (races), 215 ; 

 in the genus Hesp)eria . . 93, 141 

 Gloucestershire Lepidoptera . . 60 



Growth in Spiders .. .. ..61 



Gryllodea at Salonika . . . . 48 



Gynandromorphous Agriades cori- 

 don, 211, 218; Amorpha populi 

 (hybrid), 43 ; Andrena cressoni, 

 214 ; Diptera, 238 ; Gupido mini- 



