132 Proceedings of the Royal Physical Society. 
and third, legs of the female, inverts his body beneath hers, and obtains 
a firm hold by laying the tarsi of his fourth legs on the dorsal surface of 
her abdomen. A flask-like hyaline sac or bubble (“spermatic capsule”) then 
appears in the male genital opening and becomes distended with sperm- 
mother-cells (“spermatocysts”). His mandibles are exserted and placed one 
on each side of the capsule, which adheres to them by a viscid material that 
it has about it. The mouth of the flask is transferred to the genital opening 
of the female, and its contents are discharged into this opening by the 
elasticity of the capsule. The empty, shrunk capsule remains attached to 
the mandibles. The capsule and its contents are figured in the paper 
referred to, plate 33. 
In the case of Hugamasus immanis, as observed by the present writer 
~J 2 KK 
oO 
Fria. 3. #. immanis, male. Fie. 4. H. immanis, female, 
Enlarged view of second Enlarged view of a portion, of ventral surface, 
leg of left side, viewed from showing plates which guard the genital opening 
the front —Paragynia, Pa., in front; epigynium, Epa. 
. Or ? b) Ov ’ ’ 
behind ; also breathing apertures or stigmata, Sr. 
who was not then acquainted with Michael’s description, the process was 
similar in its general features. The male climbed, back downwards, beneath 
the body of the female, seized with his second leg of each side the corre- 
sponding fourth leg of the female, and secured a firm hold with the help 
of the “stridulatory spur” (Fig. 3, Sp.) on the third joint (femur) of his leg 
and of the stridulatory processes (Fig. 3, St.) on the fourth and fifth joints 
(genu and tibia). The writer has had no observation of the stridulatory 
function of these processes. 
The mouth parts of the male were directed forward beneath the body 
of the female. The hind end of his body projected behind the extremity of 
the body of the female. The two hind pairs of lees of the male were relaxed 
and took no part in the holding. His front legs were held extended and his 
