RHorALOCEHA OF THE GUILDFORD DISTRICT. 311 



large inlier of Atherfield and Wealden clay in the latter ; it is 

 somewhat triangular in shape (the Wealden occupying the centre), 

 and is nearly five miles in length from east to west, and about two in 

 width at its widest part. 



As may be gathered from the above, the physical geography is 

 equally diversified. The river Wey flowing towards the N.N.E., inter- 

 sects the district, dividing it into two nearly equal portions. The small 

 portion of Bagshot sand included within the northern boundary of the 

 district is low-lying land, being only a little over 100 feet above 

 sea level ; some portion is under cultivation, but the largest part is 

 boggy moor. The London clay, on the other hand, is almost wholly 

 under cultivation ; it is also slightly more elevated, rising in some 

 places to nearly 200 feet. The chalk is in parts cultivated < the cap- 

 ping of drift being chiefly occupied by woods of beech and oak), but 

 by far the larger portion is bare down. At the eastern boundary of 

 the district the chalk ridge attains an elevation of over 600 feet. The 

 portion west of the river is a part of the well-known " Hog's-back ;" 

 it is very narrow, the strata being tilted up at such a high angle, 

 that the northern slope is as steep as the southern escarpment ; its 

 highest point is just over 500 feet. The lower greensand is, to a very 

 large extent, occupied by pine-woods and extensive heaths. The Folke- 

 stone beds rise very steeply from beneath the chalk ; in one place they 

 attain the same elevation as the latter (500 feet), although the hori- 

 zontal distance between their respective summits is only about half a 

 mile. The Hythe beds are cultivated to a much larger extent than 

 the last ; they are also less elevated, their highest points, which are 

 capped by an outlier of the Folkestone strata, not rising much above 

 800 feet. South of our area, however, they rise above the Weald with 

 a fine ragged escarpment, which includes some of the highest points 

 in the S.E. of England. The Wealden inlier forms a tract of swampy 

 common only slightly elevated above the level of the river ; it is also 

 covered to a large extent by river gravel, etc., deposited by that stream 

 and its tributaries. There is little doubt but that it is the bed of an 

 ancient lake. 



HESPERIDES— Hesperid^ — Nisoiiiades tages, L. — 1896 : Not 

 so common as usual, and late, not seen before May 11th. 1897 : 

 Rather scarce, and later. May 17th. Si/richthus malcac,lj. — -1896: 

 Rather scarce, first. May 11th. 1897 : Very scarce. May 17th. Pam- 

 phila ■■ii/lcanus, Esp. — 1896 : Much scarcer than usual ; 1897 : Fairly 

 common. In most years it is very abundant. F. comma, L. — 1896 : 

 Commoner than I have ever noticed it before, and out early, the first 

 being observed on July 23rd. 1897 : Not common and late, August 

 5th. TInjmclwm thauiiias, Hufn. — 1896 : Common. It had been rather 

 scarce for several years previous. 1897 : Not common. 



FAFlhlONlDE^—LiYGJEkiDJE — Clin/soji/unius phlcu-as, L. — 1896 : 

 Fairly common, but in nothing like the abundance in which it occurred 

 in 1893. 1897 : Fairly common. I'irst and second broods very 

 late. Third brood just out in considerable numbers on Oct. 5th, most 

 of those observed being females. The first brood is always scarce 

 here, and the few specimens obtained of it all agree with the ab. 

 intermedia, Tutt, the fore-wings being brassy or golden instead of 

 coppery. Poh/onimatus conjdon, Poda. — 1896 : More abundant than I 

 have ever seen it. The disproportion between the sexes was very 



