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INDEX. 



GENERAL. 



Aberrations of Coccinella bipuiictata, 



271 

 Abisco and Bossekop revisited, 264, 280 

 Abraxas grossiilariata. second brood, 5'2 

 Acronycta alni ab. steinerti, 173 

 Adaptation of caterpillars to their sur- 

 roundings, The. 217 

 Aglais urticsB, ab., and Cidaria imma- 



nata, ab., 289 

 Af^riades corydon ab. semi-syngrapha 



in Sussex, 16 

 Agrotis scgetum in March, 148 

 Ainphidasys doubledayaria in the Isle 



of Man, 219 

 Anosia plexippus in Britain, 145, 210 

 Aporia crattegi, L., in Cyprus, 219 

 Arctia caia utabensig, Hy. Edw.. 238 

 Argynnis selene, second brood at Abbott's 

 Wood, 17 



Blood-sucking Thysanoptera, 198 ; 



Thrips, 163 

 Brenthis euphrosyne, ab., 172 

 Bventhis selene, second brood, at 



Abbott's Wood, 17, 243 

 British Aphides, New and little known, 



230 

 British I'.raconidas, 6 

 British Neuroptera, Notes on, 212 

 Butterflies in South Cornwall, 20 ; in 



the Isle of Purbeck, 21 

 Butterflies on the South Salisbury 



Downs, 1921, 295 

 Butterflies of note observed around 



Tring, 124; of South Bucks, 1920, 



50 ; of Ventnor, 51 ; of West Sussex, 



197 

 Butterfly notes from Cumberland, 99 



Catocala fraxini m Scotland, 244 

 Celastrina argiolus treble-brooded, 242 

 Celerio euphorbiae mauretanica, Styr., 



in Porto Santo, 146 

 Chrysophanus dispar, Hw., 16 

 Chrysophanus phlaeas aloa, 268 ; c;eru- 



leopunctata, 17 ; schmidtii. 242 

 Chrysophanus phlaeas var. casruleo- 



punctata on dry ground, 101 



CcEuonympha pamphilus vars., 242, 290 

 Coleophora agramella in Essex, 219 

 Colias edusa and ab. helice, 18 

 Colias edusa and Caradrina ambigua in 



South Devon, 242 

 Colias edusa, C. hyale, etc., on the 



Sussex coast, 292 

 Colias edusa, etc., in Hampshire, 100 

 Colias edusa. Fab. (croceus, Fourc.) : its 

 seasonal forms, varieties and aber- 

 rations, 135, 153, 184, 251 ; A further 

 note on, 279 

 Colias edusa, Pyrameis atalanta and 

 Aglais urticse in Cambridgeshire, 

 Guernsey and N. France, IS 

 Colias hyale and Pyrameis cardui in 



Essex, 241 

 Colias hyale at Hazeleigh, 242 ; in Kent, 



270 ; in Sussex, 242 

 Collecting in Gloucestershire, etc., 1918 



and 1919, 117 

 Contributions to our knowledge of the 



British Braconidie, 6 

 Cnephasia commuiians in Surrey, 127 

 Crickets and refuse dumps. 246 

 Curious Lite emergence of Papilio alex- 



anor, 17 

 Cyaniris avgiolu-^. Notes on, 290 



Dark variety of Arciia caia, L., 292 

 Descriptions of three new butterflies 



from Colombia, 278 

 Deiopeia pnlchella at Eastbourne, 270 ; 



in London, 270; in Essex, 292; in 



Sussex, 298 

 Depressaria autocnista, n. sp , 76 

 Dianthiecia albimacula, Borkh , in 



Suffolk, 126 

 Disappearance of Agriades corydon ab. 



syngrapha from the Chilterns, 48, 98 

 Dusky male form of Dryas paphia, 145 



Early and late occurrence of Hespeiia 

 malva?, 195 



l''arly appearance of C^elastrina argiolus 

 and Pieris brassicfe, 147; of Drepana 

 laceriiiuiria, 126 ; of Pieris rapw, 126 



Early butterflies, 148; in 1921, 173 



