THK I.EI'IDOI'TERA OK KSSKX. 9I 



is (as Mr. Haworth has observed) that 'their eggs in this chmate, 

 hke the seeds of some vegetables, may occasionally lie dormant for 

 several seasons, and not hatch, until some extraordinary but undis- 

 covered coincidences awaken them into active life.' Until four or 

 five years since V. antiopa had not been seen for nearly forty years, 

 when it was exceedingly abundant in different parts of the kingdom. 

 In the year 1819 a few were taken in Suffolk, and Mr. Samouelle cap- 

 tured one the following spring that had lived through the winter, 

 since which period it has not been seen. It has received its Eng- 

 lish name from having been first observed at Camberwell, whither 

 it might have been attracted by willows, upon which the larvae feed, 

 and are full grown the beginning of July," &c. {Curtis ; B.E. 96). 

 Insect migration was then but imperfectly understood (see my last 

 presidential address, E.N. iv. 7). Lewin says, "In March, 1790, a 

 number of these insects were flying and soaring about for the space 

 of twelve or fourteen days ; and then, as if with one consent, they 

 migrated from us and were no more seen." 



Little Oakley {Jermyn ; V.M. 69). One, Little Oakley Rectory, 

 Aug. 1 8th, 1857 {H. T.Stainton; E. W.I. iii. 13). Twelve, Colchester, 

 1872 {Hanvood ; E.M.M. ix. 137). Two, Roman Hill, Colchester, 

 Sept. 2nd, 1872 {H. Aggio ; F. xl. 249). Dr. Laver has a specimen 

 taken at Middlewick, Colchester, by William Tillaney, Aug. 29th, 

 1880. Two, Halstead, Sept. 2nd, 1872 (,5'. R. Bentall ; Ent. vi. 

 216). One, Clavering, Aug. 31st, 1880 {W. G.Nash; Ent.\\\\. 

 239). One, Saffron Walden, Sept., 1846 {G. S. Gibson; Z. iv. 

 1507). Three, Witham, Aug. 23rd-Sept. 5th, 1872 {Cansdak : 

 Ent. vi. 215 ; F. xl. 214V One, Great Braxted, 1837 {C. Walford : 

 E.L.J. 27), One, Maldon, Sept. 13th, 1872 [Raynor ; Ent. vi. 

 216). I have one from Maldon, taken many years ago by Miss 

 Hance (see E.N. ii. 242). Several, Mundon, 1872 {Rayiwr ; Ent. 

 vi. 216,264). Two, Latchingdon, 1872 {Chelmsford Chronicle; 

 Ent. vi. 216). One, Cold Norton, 1879 {Raynor ; T.E.F.C. iii. 

 38). Several, Burnham, 1872 {Raynor ; Ent. vi. 216). One, 

 Hurnham, iZ-ji {Fitch : E.N. ii. 83). One, Bradwell-on-Sea, vSept. 

 2nd, 1872 {/. W. Mills ; Ent. vi. 215). One, Canewdon, July, 

 25th, 1873 {Fitch ; Ent. vi. 457). One, Hockley, Aug 24th, 1872 

 {Fitch ; Ent. vi. 193). One, Southend, Aug. 28th, 1872 {E.J. Hig- 

 gins ; E.M.M. \x. 109). One, Southend, 1872 {C. S. Barnes; F 

 xl. 249). One, Chelmsford, Aug. 26th, 1857 (/. Flatnian, E.IV.I. 

 ii. 182). One, Brentwood, Sept. 2nd, 1872 {E. F. Grozvse ; Ent. vi. 



