58 (53) Seminal bursa with a cuticularized nozzle 



(Fig. 123) 59 



Kiguiv 123. — Philaclinoposlhia saliem. 



58 (53) Seminal bursa lacking a cuticularized 

 nozzle 



.60 



59 (58) Four copulatory organs present 



(Fig. 124) Genus Tetraposthia. 



Figure 124. — Tetraposthia colymbetis. 



59 (58) A single copulatory organ present (Figs. 125, 126) . 



. Genus Philactinoposthia. 

 Genus Monoposthia.^ 



Figure I25a. — Philactinoposthia saliem. 



Figure 12Sb. — Monoposlhia pseuduvesicula. (See text foolnote 7.) 



Figure \2(>.— Philaclinoposlhia adenogonaria. 



'Genus Monoposlhia, recently described from ihe Galapagos Islands, is close lo Ihe genus Philactinoposthia bul lacks a true seminal vesicle, such as is present in Philactinoposlhia. 



39 



