A Contribution to the Spider Fauna of Scotland. 121 
posterior margin of a central, cordiform, pigmented area. The posterior 
termination of this area forms a prominent bilobed lip. Length from 
anterior end of heart-shaped area to posterior margin of lip, ‘21 mm. 
A single female was found on June 10th, amongst moss, in the Black 
Wood of Rannoch. 
This species closely resembles the common Robertus neglectus Camb. in 
size, colour and facies. It differs entirely in the structure of the epigyne 
from that species. 
The only figure of this structure in A. neglectus known to me is that of 
Mr Cambridge, in Spiders of Dorset, plate vi. fig. 7d., sub BR. astutus Camb. 
In this species the central pigmented area is roughly circular, and the 
sexual aperture is placed in the middle or between the middle and the anterior 
margin, considerable variation in this respect being shown. The details of 
the aperture are quite different in the two species, and in &. neglectus there is 
no bilobed posterior termination of the epigynal area. 
The epigyne figured by Bosenberg, in Die spinnen Deutschlands, fig. 183, 
as that of Pedanostethus Clarckwi Camb. (sic), is quite unlike that of either 
species. 
Professor Kulezynski, who kindly examined the specimen of R. scoticus, 
tells me his figure in Aranee Hungarie does not represent the vulva of the 
true Lf. neglectus Camb., but some other species. 
In all the specimens of £&. neglectus in my collection the slope of the 
carapace, as seen in profile, is much more regular than in J. scoticus, The 
thoracic juncture in no case is the highest point, that being rather nearer 
the caput. The whole curve is as arule pretty regular, though there may 
be a slight concavity between the thoracic juncture and the peduncle. 
The unusual shape in &. scoticus may of course be only an individual 
peculiarity. 
Genus THERIDION. 
The discovery of a small Zheridion on the mountains of Scotland has 
made it clear that two species have been included by some continental 
writers under the name of 7’. lepidwm Walck. One of these, described by 
Mr Cambridge as Theridion instabile, was already known in Britain; the 
other, which I am now recording as YT. bellicoswm Sim., is recorded here for 
the first time. As the result of a correspondence with Mr O. Pickard- 
Cambridge, Mr Simon and Professor Kulezynski, none of whom expressed 
exactly similar views, though all were in general agreement, I am now 
abandoning the name 7. lepidwm Walck. altogether. It seems plain that 
it is impossible to decide which of these species is meant by the original 
