BR. J. ENT. NAT. HIST., 13: 2001 





m 



Figure 1. Pseudocollinella Duda. Female sternite 10 (hypoproct, subanal plate) in strict ventral 

 view: a, jorlii; b, humida. 



X 



DAD 



DPD 



Figure 2. Pseudocollinella Duda. Female mid-tibia, dorsal view: a, jorlii; b, humida. 

 Abbreviations: DAD = distal anterodorsal bristle, DD = distal dorsal bristle, DPD = distal 

 posterodorsal bristle. Scale bars: sternites 0.21 mm, tibiae 0.3 mm. 



may be so pale as to be completely transparent, and it will then take the semblance of 

 a pyriform excision. Two highly sclerotised spine-like thickenings of the ante- 

 romedial margin of the sternite flank its apex. In humida, the 10th sternite is roughly 

 quadrangular in shape with a highly setulose posterior third, a finely rugose central 

 part and a paler triangular anteromedial zone (Fig. lb). Spine-like thickenings are 

 completely absent. 



The 3 dorsal bristles that occur on the distal part of the middle tibia of both species 

 also provide useful distinguishing characters. For the sake of clarity, I have adopted 

 the terminology used by Marshall & Smith (1993) to describe the position of these 3 

 important bristles: distal anterodorsal (DAD), distal dorsal (DD), and distal 

 posterodorsal (DPD). In jorlii, the DPD is weak and short, about half the length of 



