BR. J. ENT. NAT. HIST., 7: 1994 145 



1993 ANNUAL EXHIBITION 

 Imperial College, London SW7— 30 October 1993 



The following account of exhibits has been compiled by R. D. G. Barrington (British 

 Butterflies), B. K. West (British Macrolepidoptera), J. M. Chalmers-Hunt (British 

 Microlepidoptera), B. Goater (Foreign Lepidoptera), P. J. Chandler (Diptera), 

 P. J. Hodge (Coleoptera), P. Kirby (Hemiptera), A. J. Halstead (Hymenoptera and 

 other orders) and R. Dyke (Illustrations). The photographs for the two colour plates 

 were taken by D. E. Wilson. 



British butterflies 



Bailey, K. E. J. — (1)A series of Pararge aegeria L. ab. cockaynei Goodson with 

 heavily smudged markings, bred in i— ii. 1993, included some extreme forms. This 

 aberration has an environmental rather than genetic basis, occurring when 

 overwintering larvae complete their development early. An example of the aberration 

 was illustrated in Br. J. Ent. Nat. Hist. 1991 ; 4: Plate I. A range of aberrations from 

 the exhibitor's continuing work with the effects of temperature and photoperiod shocks 

 to late larvae and early pupae. Included were extreme melanic forms of Polygonia 

 c-album L. ab. reichstettensis Fettig, Aglais urticae L. ab. semiichneusoides Pronin, 

 Vanessa atalanta L. ab. klemensiewicsi Schille and Nymphalis polychloros L. ab. 

 testudo Esper. One specimen of testudo was of a very unusual form with greatly 

 reduced dark markings. Minor forms of Argynnis adippe D.& S. had the hindwing 

 marginal spots confluent (extreme cold of - 14°C was required at the pupal stage 

 to induce this variation). 



A wild-captured Boloria selene D.& S. ab. pittionii Nitsche from which ova were 

 obtained, and a captured aberration of Boloria euphrosyne L. with confluent 

 hindwings. After years of trying, Mr Bailey has succeeded in producing aberrations 

 of B. euphrosyne. These occurred when the larvae were photoperiod-stressed, and 

 the pupae were then cold-shocked. One specimen was an extreme form with the 

 underside obsolete and with heavy silver markings. 



(2) A quite beautiful series of extreme forms of Eurodryas aurinia Rott. ab. sebaldus 

 Schultz (Plate I, Fig. 5). These were the result of cold-shocked pupae that were bred 



Plate I. ANNUAL EXHIBITION 1993 



1: Lysandra coridon ab. discreta-postradiata , Dorset, 30.vii.1993, 

 S. J. Rook. 2: Polyommatus icarus melanic underside, bred, 1993, 

 L. D. Young. 3: Polyommatus icarus ab. radiata, bred, R. Revels. 

 4: Thymelicus sylvestris ab. intermedia, 7.vii.1992, M. Callow. 5: 

 Eurodryas aurinia ab. sebaldus, bred (cold shock), K. E. J. Bailey. 

 6: Polyommatus icarus melanic ab.. Isle of Skye, 27.vi.1993, W. 

 G. Tremewan. 7: Quercusia quercus ab. latefasciata, bred, 

 27.vi.1 993, A. M. Jones. 8: Acinia corniculata, Chailey Common, 

 1 9.viii. 1 993, P. J. Hodge. 9: Maniola jurtina ab. excessa, bred, 

 Dorset, 1993, R. D. G. Barrington. 10 & 11: Victrix agenjoi, 

 Valladolid, Spain, B. Goater; 10 male, 1 1 female. 12 & 13: New 

 dudgeonid species, Borneo, G. Ping & G. S. Robinson; 12 male, 

 13 female. 14: Sataspes inferna/is, Hong Kong, 1993, P. Waring. 

 15: Lymantria dispar, bilateral gynandromorph, bred US Dept. 

 Agric, R. D. G. Barrington. 



Photo: D. E. Wilson 



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