FROM THE SOCIETY S- GARDENS. ZO t 



Chcetotaxy. Female. — As in the male, except in the region of 

 the genital opening. Here, a fringe of hairs runs around the 

 margin of each gonopod, and there is a patch of short ones 

 between the gonopods at the base. 



Male Gopulatory Apparatus. — This resembles that of T.forficula 

 according to Piaget's rather obscure figure. Basal plate: Consists 

 of two straight parallel-sided marginal bands, parallel to one 

 another, with a transparent and apparently membranous median 

 strip between. At its base for the articulation of the paramere 

 each band is obliquely truncate. Parameres : Much shorter than 

 the endomeres. Each paramere in the mid-part of its length is a 

 narrow rod ; towards the base its inner margin runs out to form 

 an inner trochanter, as broad as the band of the basal plate to 

 which it is attached. Distally, the paramere broadens dorso- 

 ventrally and forms a concave flange, the concave surface on the 



Text-fiirure 1(5. 



Trichodectes harrisoni. Male moixtl'.-parts (maxillis not shown). X 200. 

 L. Left mandible. R. Right mandible. X 168. 



6r. Gland ; K. knob ; LO. lyriform organ ; P. paraglossa ; 1, 2, 3. apices. 



inside. Endomeres : Large pieces, the tips reaching almost to 

 the genital opening. They are fused into one piece at the base 

 and form a single forked sclerite, concave dorsally, so as to hold 

 the sac. Each limb of the fork is quite broad, but has an acute 

 apex and carries a small nodular tooth subapically. The sac is 

 long, covered with small denticles. Penis and telomeres are 

 developed on the distal end, but are very delicate and trans- 

 parent, and hard to make out (text-fig. 15). 



Mouth-parts (text-fig. 16). — Mandibles: These resemble those 

 of T. hemitragi, than which, however, they are relatively much 

 smaller and less powerful. When in repose, moreover, only the 

 distal ends overlap, that of tlie right being a little behind and 

 above (on the inside of) the left. In each there are three apices ; 

 on the right there is the same stout quadi'angular process, with 



