188 



Dr. Guy A. K. Marshall on 



Described from three specimens. 



In these two species the median lobe of the male aedoeagus 

 consists of the usual curved chitinised tube, the apical 

 spatula, comprising one-fourth of the length, being a simple 

 trough-Hke projection ending in a fairly sharp point; the 

 struts are five-sixths the length of the tube, hinged at the 

 point of attachment, and rather slender. The uneverted 

 sac projects backwards for nearly twice the length of the 

 struts, being a long slender tube with some minute asperities 

 in the terminal fourth, but without any distinct transfer 

 apparatus. The tegmen has a complete ring, with two 

 narrow dorsal lobes, which are united for half their 

 length, and the stalk is more than twice as long as the 



Fig. 1. — Female genitalia of Pseiidocyphus sellatus, sp. n., lateral view ; 

 a, vagina ; h, bursa copulatrLx ; c, chitinous rods in walls of vagina ; 

 d, vaginal palps ; e, strut of 8th ventrite. 



lobes. Ventrite 8 consists of two separate subtriangular 

 plates. 



In the $ the vagina (fig. 1) is a very long, lightly chitinised 

 tube (in one specimen of Ps. sellatus it measures 5 mm.), 

 containing two fine chitinous rods that reach from the 

 base almost to the apex; the terminal palps are reduced 

 to two minute granules, their tactile function being appar- 

 ently usurped by a number of hairs scattered over the 

 apex of the vagina, and also by the still more numerous 

 hairs at the tip of the attached 8th ventrite; the latter 

 has a very long slender strut, the two together measuring 

 6 mm. in the specimen referred to. The bursa is pro- 

 portionately very small, being a simple membranous sac. 

 The membrane enveloping the vagina is nowhere chitinised. 

 The spermatheca as figured (fig. 2, e). 



