538 Proceedings of the Royal Physical Society. 
Drassus blackwallii, Thor. 
Drassus sericeus, Bl. Spid. Great Brit, and Irel. 
We have not been so fortunate as to meet with this spider, 
but Mr Cambridge captured a specimen among stones on 
Arthur’s Seat in June 1861. Careful search about outhouses 
and old buildings after nightfall would probably reveal its 
presence in a number of localities. 
Drassus troglodytes, C. L. Koch. 
Drassus clavator, Bl. Spid. Great Brit. and Irel. 
Widely distributed, and fairly common under stones, ete., 
lying on sunny banks and hillsides. It seems to be more of 
an upland species than the next; on the southern slopes of 
the Pentlands, for instance, we find it the more frequent of 
the two. Adult during the summer months. 
Bavelaw Moor and south side.of Carnethy (Pentlands), March, ¢ and two 
9s imm.; Pettycur Links, March, five gs and one 9, all imm.; Inver- 
keithing, April, @ newly ad.; Braid Hills, Aug., four 9s; Luffness Links 
and Gosford, Sept. and Oct., eight or nine ?s, mostly imm.; summit of 
West Kipp (Pentlands), Oct., g imm.; Pentlands above Boghall, Oct., 
five or six gs and 9s imm.; Lothianburn and road south of Dalmahoy 
Hill, Nov., numbers of both sexes immature; ete. 
Drassus lapidosus (Walck.). 
Drassus lapidicolens, Bl. Spid. Great Brit. and Irel. 
Generally distributed, and in most localities a plentiful 
species at all times of the year. Examples, however, with 
the reproductive organs fully developed, practically occur 
only towards the close of spring and during summer, and 
they are then probably more than one year old. 
Braids and Hillend, under whins, Feb., imm. ¢s and ¢?s in about equal 
numbers; Kirknewton, Blackford Hill, and Loganlee (Pentlands), March, 
numerous ¢sand 9s imm.; Pettycur, end of March, ¢ ad. and others of 
both sexes imm.; Aberdour and Dalmahoy, April, ad. gs and @?s, others 
imm.; Arthur’s Seat and Aberlady, May and June, both sexes ad.; Peebles 
and Penicuik, July, several 9s, one ad.; Isle of May, Aug., one g young; 
‘Aberlady, Sept., gs and 9s imm.; Bonaly, Ravelrig, and Rullion Green, 
Oct. and Nov., gs and 9s, some of latter large, but all still immature; 
Braids and Swanston, Nov., ¢ and ?simm.; Bridge of Allan, Dec., two ?s 
scarcely half-grown ; ete. 
