AGRIADES CORIDON. 95 



localities. We have taken it in the main " drive " of Chattenden 

 Woods, on tertiary deposits, resting, however, on chalk ; it is recorded 

 as being common among heather at Groombridge and on Broadwater 

 Common, neither place on the chalk (Blaber); it is reported (Vict. C. 

 Hist.) as having been caught several times in Cornwall, although there 

 is no chalk in the county, occurring on railway-banks at Terras (Clogg); 

 it is also noted as common at Broxbourne Common, Turnford, and 

 St. Albans in Herts, all a considerable distance from the chalk ; 

 it occurs at Portland, where again there is no chalk (Partridge); and 

 in the Wootton-under-Edge district, miles from any chalk (Thompson). 

 Abroad, it occurs among dark trap rocks at Aussig in Bohemia (Weir); 

 and on the Taunus Hills, not on chalk (Prideaux); whilst Chapman 

 (Proc. Sth. Lond. Ent. Soc, 1906, p. 60) states that it occurs at Ste. 

 Maxime, where there is neither chalk nor limestone. Our knowledge 

 of the geology of so many of the localities in which we have collected 

 abroad is too uncertain to allow us to make definite statements, but we 

 believe that it often occurs freely off limestone in many places. Of the 

 many localities recorded for the species in England, we note that it 

 occurs on some of the open dry hillsides of the Cotswolds (C. J. 

 Watkins), on a sea-bank about two miles west of Beer Head, where 

 Leptidia sinapis, Thym elicits acteon, Agriades thetis, Buralis betulae, and 

 other interesting species occur (Blathwayt), abundant in the chalkpits 

 near Cambridge (Lee), and on the chalk-hills near Bedford (Barrett), 

 abundant, the imagines seen settling in the cornfields to the north of 

 the chalk range in Purbeck, though not seen on the south side 

 (Parmiter), swarms on the chalk downs extending east from Devizes 

 (Sladen), chiefly confined to the open paths of the woods at Watlington 

 (Lucas), on the waste ground around Carisbrooke, etc. (Prideaux), on 

 the downs in the neighbourhood of Kimble (Bowland-Brown). Keynes 

 published (Ent. Record, xxi., p. 268) a most interesting note on the 

 habitats of this species in Cambridgeshire and the neighbouring- 

 district, where it is confined to the uncultivated parts of the low chalk- 

 hills between Cambridge and Baldock in Herts. The species has 

 certain fluctuations in its abundance and rarity, and, in some years, it 

 not only abounds in its own home localities, but attempts to spread its 

 range into comparatively little suited districts, entering even into 

 suburban London at some distance from its known nearest haunts ; 

 such a record is that of its occurrence in Ladbroke Square, Notting 

 Hill, in August, 1864 (A. H. Clarke), then a much more suburban 

 district than at present ; singly on the railway-bank at Brockley 

 (W. West), etc. Walker notes (in litt.) that, in 1903, he took, at 

 Watcombe, near Torquay, an example in June on the Red Sandstone, 

 no chalk or limestone being near, and heard of another being captured 

 there ; similarly, in 1874, two specimens were taken in the Orchard 

 Woods near Taunton, where there is no chalk within 15 or 20 miles 

 (teste Stansell, Ent., viii., p. 158), and a specimen was taken recently 

 on the Quantocks, many miles from the nearest chalk (Tetley). Rait- 

 Sixiith observes (in litt.) that, on August 26th, 1905, at Abertillery, he 

 took a $ in good condition in a marshy meadow, where, however, further 

 search has not provided a specimen ; similarly, Bishop records the capture 

 of a specimen in a swampy spot covered with rushes at Loughton, on 

 July 29th, 1885, a later one being captured on August 22nd, 1892, at 

 Fair Mead, by Argent. As to its taking possession of new territory, 



