4^6 



This armature is joined by the ejaculatory duct (de), a chitin- 

 ous tube lying in between the three bundles of muscles described 

 above. The tube, or rather its walls, slightly widens distally 

 and proximally and enters the praeputial sack from the ventral 

 side, curving upwards and being united with a longitudinal bar, 

 which projects proximad beyond its junction with the duct. 

 A complex armature of the praeputial sack is rather rare among 

 Earwigs, being known in a small number of genera among the 

 Protodermaptera : Gonolabis, Bormansia, Karschiella, etc., and 

 we may anticipate the armature of A . esau to be quite different 

 from that of A. jacohsoni. 



Although the tubular rod containing the ejaculatory duct 

 joins the armature contained in the praeputial sack, the duct 

 itself does not do so, but leaves the rod and makes several 

 irregular convolutions at the bottom of the praeputial sack (at 

 Vi, text-fig. 24). 



On the ventral side of the preputial sack there is a second 

 cavity, in funnel-shape, narrowing to a point proximally. Its 

 dorsal wall is continuous only at the apex with the ventral wall 

 of the praeputial sack, the funnel being otherwise independent 

 of the praeputial sack. As its sides are distally connected with 

 the end-pieces of the parameres, the ventral and lateral walls 

 of the funnel may be homologous to the proximal segments of 

 the two parameres being fused together. The tip of the funnel 

 receives a thin tube which runs along the whole length of the 

 organ of copulation and is possibly a reduced second ejacu- 

 latory duct, the funnel in that case being its praeputial sack. 

 We have not found a connection between this tube and the 

 ejaculatory duct, but further investigation may prove the tube 

 to be thrown on from the duct at the proximal end of the penis 

 where the duct is irregularly coiled up. There is no armature 

 in this funnel. 



As regards the reproductive organs of the female two main 

 types of ovaries are known among Dermaptera. The one type 

 is represented by Forfícula auriciilaria, in which the two oviducts 

 — which are united distally and receive here the duct of the 

 receptaculum seminis — bear each three rows of ovarial tubes 

 containing one egg each. The second type is exemplified by 

 Lahidura riparia, in which each duct bears only one row of egg- 



