115 



The hla-hook (fig. 174, 177) is evaginated from the left wall of the left complex and is 

 largely sclerotised by L3. Around the base of hla the cuticle is circularly invaginated 

 (fig. 178, 179). Sclerite L4K shows a dorsoventral curvature: it lies mainly in the left dorsal 

 wall of the left complex, above the base of hla (fig. 177), but its left part bends like a 

 horseshoe ventrad into the invagination around the hla-base (fig. 178). 



Right phallomere 



Sclerite R3 occupies the anterior ventral wall (fig. 190- 194). In the posterior part of R3 

 the cuticle is considerably thickened (cross-section in fig. 193). Sclerite R2 articulates with 

 the left posterior margin of R3 (A7 in fig. 190-194). R2 forms a large ridge (fig. 191, 192, 

 194), whose left-dorsal part curves dorsad and slightly back to the right (fig. 190). The 

 right-ventral end of R2 has the extension R2in (fig. 191-195). Posterior to the central part 

 of R3 the ventral wall of the right phallomere curves dorsad to form a narrow, groove- 

 like central invagination (cbe in fig.190, 191; compare fig. 193 and 195). 

 Posterior to the right part of R3 sclerite RIF adjoins, and the two sclerites articulate (A3 

 in fig. 190-194). From its central part behind the A3-articulation RIF extends in two 

 directions: The ventral arm bends left-dorsad (at and behind edge 16 in fig. 193, 195) and 

 largely occupies the right-dorsal wall of the cbe-invagination (fig.190). The distal part of 

 this arm forms a somewhat spoon-shaped process pva (fig. 190-195). At its distal anterior 

 margin this arm articulates with R2 (A6 in fig.190, 195); at its basal posterior margin it 

 has a distinct extension (20 in fig.190, 192-195). The dorsal arm of RIF extends 

 posterodorsad (fig.190, 191) and forms a sclerotised groove (rge in fig.190, 195). The part 

 of RIF posterior to A3, the extension 20, and the dorsal arm show an extensive thickening 

 of the cuticle directed to the interior of the phallomere (cross-sections in fig. 195). 

 The posterior part of the right phallomere is a large dorsal lobe fda (fig.190, 194; in the 

 figures fda is pulled to the right and to the posterior), whose dorsal and ventral walls are 

 partly occupied by sclerite RIJ. The dorsal anterior tip of RIJ articulates with the dorsal 

 arm of RIF (A8 in fig.190), its ventral anterior margin articulates with the extension 20 

 of RIF (A9 in fig. 192-195, 197). Near the A9-articulation the cuticle of RIJ is, like that 

 of extension 20, thickened to the interior, and the articulation is thus very stout and deeply 

 immersed in the phallomere (fig. 193, 195). The right wall of fda has a large membranous 

 area (17 in fig.190, 193, 194). The posterior edge of fda bears a sclerotised spine (sra in 

 fig.190). 



Subgenital plate and posterior abdominal segments 



Fig. 169, 170 (posterior segments); fig. 173 (subgenital plate S9). Tergite 10 TIO is not 

 completely divided longitudinally, but around its posterior edge there is a median mem- 

 branous field (21 in fig. 169). The ventral part of tergite 10 TlOv is moderately extensive 

 and is, except for an anterior transverse bridge, also divided by membrane 21. The 

 paraprocts Pp are divided (by the articulations A97) into a large median part sclerotising 

 the dorsal wall of the subanal lobe sbl and a small lateral plate-like part. Along the 

 anteriormost and medianmost dorsal wall of the subanal lobe sbl each paraproct forms a 

 heavy groove-like apodeme (fig. 170; cut through on the right side). The lateral plate of 



