FROM THE society's GARDENS. 271 



Ratite bird as Dinoi'nis or Apteryx. The posterior lateral pieces. 

 are produced some way backwards and join on each, side a trans- 

 verse band. From each end of the transverse band a posterior 

 cornu coils upwards on each side of the pharynx. The plate alsa 

 has a posterior median process and two anterior lateral processes. 

 The latter run forward and each gives articulation to a chitinous 

 strip which bends round at the mouth and there forms the double 

 fringed plate. Forwards, from the pharyngeal plate between the 

 two anterior processes, two strong narrow cords run, forming 

 between them the " ciliated groove," but diverging and even- 

 tually curling around posterior to the fringed plate on each side, 

 so as to turn back into a broad, somewhat indefinite sheet of 

 rather thin opaque chitin set with teeth. 



Genus Trichodectes Nitzsch. 



Trichodeotes brevigeps Rudow (11). 



8 2 5 from Lama glama L. (Family Camelidae). Rudow's 

 descriptions are notoriously bad, and are, as a rule, insufficient 

 even for identification purposes. I prefer, however, to refer 

 these female specimens to his species for the present, rather than 

 describe them as new. 



Trichodectes parumpilosus Piaget (2, p. 397). 



Two immature specimens from Cervus xanthopygus M.- 

 Edwards, I refer very doubtfully to this species. 



Trichodectes latus JSTitzsch (10, p. 53). (Text-fig. 10.) 



Twelve specimens, including males, from Canis latrans Linn. 



Male Copulatory Apjyaratus (text-fig. 10). — Basal plate : The out 

 line is shown in the figure. The lateral margins are strongly 

 developed rods, the main body of the plate between being concave, 

 so that the whole plate is of a trouglvlike form. At its anterior- 

 end the plate is rounded and the chitin becomes opaque and the 

 outline indefinite. Parameres : At the base these are broad and 

 leaflike, folding around the mesosome so as to form a sheath. 

 The margins of the parameres almost meet each other over the 

 dorsal surface at the base and similarly over the ventral surface.. 

 The sac is shot out between the parameres and is covered with 

 denticles. One-half of the distance from its extremity is a 

 transverse row of about eighteen, triangular denticles, larger 

 than the rest, and functioning probably as retinacula. On the 

 dorsal surface tho base of this sac is strengthened by a flat 

 lanceolate splint of chitii:i, with a broader base (at the lower 

 margin of the basal plate) and a much narrower distal end 

 towards the tips of the parameres. When the apparatus is 

 retracted, this lanceolate band at about halfway is bent down- 

 wards and back upon itself, so that in side view it appears as an 

 enigmatic loop. Between the two lateral margins, in the clear- 



