534 Proceedings of the Royal Physical Society. 
North of Scotland will doubtless strike those of our readers 
who have given any attention to the group. peira cornuta, 
Cl., and #. quadrata, Cl., for instance, are absent, but the 
fact cannot well be attributed to mere want of observation, 
for we could scarcely have failed to detect such large and 
conspicuous spiders had they been present in any numbers. 
When the more distant parts of the district have been 
investigated, both species will probably be met with,! since 
they are known to occur in adjoining areas; but in the more 
immediate neighbourhood of Edinburgh their existence is 
doubtful. 
This leads us to remark that in attempting to give the 
local status—common, rare, and so on—of each species, we 
state no more than cur own experience, which of course is 
lable to be modified by further investigation. The extent 
of our data—based on something like four thousand speci- 
mens (the contents of over two hundred tubes, representing 
the captures of nearly as many days, made in all sorts of 
localities)—induces us, however, to believe that most of these 
statements will be found to be fairly accurate, and renders it 
highly improbable that any species really common has been 
overlooked. 
In the majority of cases we have thought it desirable to give 
a list of the localities in which we have taken the species, 
however common, adding (and this is the essential part) the 
month, sex, and condition of the specimens—whether adult, 
immature, or very young—in the hope of throwing some 
light on their life-histories, a branch of the subject which has 
not yet received the attention it deserves. The yearly cycle 
of a number of species, that is whether they are single or 
double-brooded, etc., can thus be made out with tolerable 
certainty. 
In the matter of arrangement of the species we follow in 
the main that given by Cambridge at the end of the “ Spiders 
of Dorset,” but the Zheridiide are grouped under the genera 
given in Simon’s “Arachnides de France.” The name under 
1 Since the above was written we have (May 1894) obtained these two 
species; also Singa hamata (Cl.), Chiracanthium carnifex (Fabr ), and a tew 
other interesting spiders at Callander, ° 
