I'AIRIXG OF rSEUDOSOORPIONES. uS.'J 



oyeless. lu the uiiile, iii addition to tlie important dillerences 

 above iiiilicated, there is a deep-seated nnlikeness in the internal 

 organs ; and we shall find that the sperniatophores are entirely 

 nnlike, with corresponding difterences in the pairing. 



In the second week of April 1911, a supply of specimens was 

 ol)tained from llichiuond Pai-k*, and a. cell was stocked with five 

 or six individuals, which were kept under daily observation till 

 the beginning of the second week of May. During this time, 

 fortunately, abundant opportunities were aftbrded for observing 

 the pairing, which was carried on with great pei'sistence on at 

 least eight occasions. The animals did not walk easily on the 

 under surface of the glass, and pairing was not observed in that 

 position ; it was well seen, however, both in doisal and lateral 

 view, and under the latter condition the details of the process 

 wei'e distinctly made out. 



Tlie male and female met, as ab'eady stated, in walking 

 jiosition head to head (text-fig. 49, p. 384) ; and, as in the former 

 species, they engaged in some preliminary fencing with the palps. 

 During this fencing the male always obtained with one of the 

 hands a fiim gi-asp of one of the haiids of the female ; and, con- 

 trary to what occurred in the former species, this grasp was 

 always maintained throughout, that is to say until the animals 

 parted company when the pairing for the time being was 

 complete, ^[oreover, while the former species held the female 

 with b(jth hands, the pi'esent animal invaiiably employed one 

 hand only in this way, always keeping the other iiand free. 

 After the grasp was made, the animals fenced with the free palp 

 and moveil about a little backwards and forwards ; the male — 

 all the time alert and eager — constantly attempting to approach 

 closely to the female. Watching the animals carefully at this 

 time, it was soon observed that the fencing had given j^lace to n. 

 regular system of display on the part of the male, whose actions 

 in this respect were quite unlike anything seen in the former 

 species. In the present case — in the absence of ram's-horn 

 organs — the display was made with the free palp and with the 

 legs of the first pair. The free palp was brought round at 

 frequent intervals and the great hand rapidly shaken in the face 

 of the female in a remarkable threatening or perhaps beckoning 

 manner; and the first legs were rapidly moved, that is to say 

 lifted and replaced, in most peculiar fashion. After a time the 

 female, apparently much impressed with these actions, oftered 

 little or no resistance, the mnle having now no difliculty in 

 approaching closely. At length the male — head to head with 

 the female but not in contact except for the continuous grasp of 

 one hand — deflected the base of the abdomen to the floor and aflixed 

 there the adhesive foot-like attachment of the spermatophore. 

 Almost immediately, the body was raised to its noi-mal position, 



* The writer is indebted to His Majest^-'s Office of Works and to Mr. S. Pullman, 

 the Superintendent of the Park, for tlie permission and facilities necessary for the 



takiniiiii' the aniniiils in this jiliice. 



