29. Labiobaetis involutus (Lugo-Ortiz & McCafferty, 1999) Figure 64b

Diagnosis .

Larva. Following combination of characters: A) labrum dorsal submarginal arc of setae composed of one plus 4-5 long, simple setae; B) labial palp segment II with elongated thumb-like distomadial protuberance, segment III about semicircular; C) maxillary palp shorter than length of galea-lacinia, without excavation at inner distolateral margin of segment II; D) fore femur rather broad, length ca. 3 × maximum width; E) fore claw with a row of 10-12 denticles; F) spines at posterior margin of tergum IV triangular, pointed, longer than wide; G) paraproct distally not expanded.

Examined material.

Paratypes. 2 nymphs (on slides, PERC 0.012.560, PERC 0.012.561), Papua New Guinea, Bulolo River, East of Wau, 2950 ft, 15 Oct 1964, W.L. and J.G. Peters leg.