BRITISH SPECIES OP PHALANGIDEA OR HARVEST MEN. 193 



0. morio from my own and other districts in the South of England. 

 With regard to the females, M. Simon, while complaining that 

 Drs. Koch and Thorell have given no positive character by which 

 to separate them, confesses that he himself has been no more 

 fortunate in this respect than those authors. As far as I can offer 

 any opinion I suspect that the two species now known as 0. morio 

 and 0. alpinus, with another, quite as nearly allied, continental 

 species, 0. palliatus Latr, embrace a widely dispersed, numerous, 

 and exceedingly variable form, of which those inhabiting the lower 

 and less elevated regions are 0. morio, while those in the more 

 mountainous or Alpine districts are 0. alpinus and 0. palliatus, the 

 two latter presenting an extreme development of colours, markings, 

 and spiny armature, all of which are comparatively less marked 

 and weaker in the plains and lower altitudes than higher up in 

 the mountains. A long series collected in all these different 

 localities, plains, hills, and mountains, would, I suspect, on 

 comparison, prove the above. It is very likely that high up on 

 the mountains the differential characters noted would be found to be 

 sufficiently constant and that the 0. morio form would be absent, 

 and thus the local form 0. alpinus would be the established one 

 there ; but the difficulty would arise when lower down towards the 

 plains both forms would probably be found gradually intermixing 

 with, and then giving way to, 0. morio. Pending, however, further 

 research, I have thought it best for the present to include 

 0. alpinus as a species recognised by authors, and found on the 

 mountains in Scotland. PI. D shows three striking varieties of 

 this species. 



OLIGOLOPHUS CINERASCENS. 



Opilio cinerascens, C. L. Koch (1839). 



Oligolophus cinerascens, C. L. Koch Sim. 1879. 

 PI. C, fig. 17. 



This species is rather smaller than 0. morio, the female 

 measuring 3 lines, the male 2J lines. There will, however, be 

 probably some variation in this as in most of the other allied 

 species. It is very nearly allied to 0. morio ; its colour is greyish 



