POEOILOCAMPA POPULI, 477 



on trees, and the imagines at light ; he has taken as many as 40 in 

 a single night flying around the electric light in his garden. Bankes 

 observes that it occurs in both the woodland and heath districts of the 

 Isle of Purbeck. In the breeding-cage both sexes commence to fly almost 

 before dusk (Woodforde). 



Time of appearance. — The larvae may be beaten throughout the 

 latter half of May and June, they were very abundant on alders in 

 May, 1885, at Fochabers (Scott), and are also to be found in May 

 and June on the trunks of various trees in woods and gardens. Haggart 

 notes the larvae on alder in June, at Galashiels, the imagines at 

 light in November and December. Riihl observes that the larva 

 is found on oak and fruit trees in May and June in the Zurich 

 district. The following are actual dates of capture : June 2nd-16th, 

 1862, at Darenth, common, May 31st, 1863, at Darenth, May 18th, 



1895, at Lyndhurst, June 25th, 1875, at Chattenden, June 10th, 1886, 

 at Bexley, May 26th, 1890, at Chattenden, May 19th, 1894, at Bexley, 

 May 26th, 1894, at Chattenden (Fenn) ; June 18th, 1875, at Rannoch 

 (A. H. Jones) ; June 12th-16th, 1871, at Sherwood Forest, May 29th- 

 June 2nd, 1876, at Abbott's Wood, June 14th, 1880, from elm, at Wicken, 

 June lst-4th, 1881, at Barnwell Wold, June 27th-29th, 1892, at Abbott's 

 Wood (Porritt) ; June 8th, 1880, fullfed at Eltham, May 30th, 1892, 

 at Bexley (Bower) ; June 6th, 1881, at Hatfield (Mera) ; May 29th, 

 1881, August 11th, 1884, June 4th, 1888, &c, in the Isle of Purbeck 

 (Bankes) ; June 10th, 1888, at Ranmore (emerged November 18th) 

 (Whittle) ; August 18th, 1886, larva at Surbiton (T. Briggs) ; June 2nd, 

 1886, May 28th, 1890, May 30th, 1893, at Brentwood (Burrows) ; 

 June 1st- 6th, 1890, at Brockenhurst (Ogden) ; August 6th, 1891, 

 pupated on August 18th, 1891, at Woodwalton (Bloomfield) ; May 20th, 



1891, larvae very young, near Plymouth (Briggs) ; June 7th, 1892, on 

 oak at Bristol, spun up June 10th (Bartlett) ; a larva pupated May 7th, 



1892, at Emsworth (Christy) ; May 13th, 1891, May 23rd, 1892, at 

 Drumreaske (Kane) ; May 30th -June 7th, 1894, at Enniskillen 

 (Brown) ; June 2nd, 1894, in Epping Forest (Tremayne) ; June 9th, 

 1894, at Peri vale (Montgomery) ; larvae pupated June 1st, 1895, from 

 Chingford, imagines emerged November 21st, 1895 (Bell) ; May 27th, 



1896, and June 27th, 1897, at Bishop's Wood (Ash) ; May 31st, 1897, at 

 Windermere (Freeman) ; June 10th, 1897, at Loughton, pupated July 

 22nd-August 4th, one female emerged November 11th, another 

 November 22nd, 1897 (Lane) ; May 14th, 1898, at Enniskillen (Allen) ; 

 larvae May 19th-22nd, 1899, New Forest (Prout). The imat/ines occur 

 from the end of October until the end of January. The average time of 

 emergence at Oxton, where the insect is very common, extends from 

 November 20th-December 25th, extreme dates being October 26th, 

 1897 (early), and January 11th, 1894 (late) (Studd) ; common at 

 light at end of October and in November, at King's Lynn (Atmore) ; 

 September and October, in Scotland (Reid) ; September and October, 

 at Frankfort (Borkhausen) ; October, in Upper Austria (Himsl) ; Sep- 

 tember 20th-November 18th in 1878, one as late as January 28th, 

 1879, at Salzburg (Fritsch) ; from November 2nd to December 18th, 

 at Golnitz (Hudak) ; in October, in Silesia (Prittwitz) ; in October, in 

 Zurich district (Riihl) ; end of September to November, in Baden 

 (Reutti) ; November 4th, 1893, at electric light, at Berne (Hiltbold) ; 

 larvae in May, imagines from October 14th onwards in the Baltic 



