1898.] 121 



3 — (2a) Legs with glossy, impure whitish hair ; plantar surface throughout and 

 in S the base of the 1st joint, usually at least the base of the 2nd joint, the 

 last two joints in the fore tarsus, and the last three joints in the hinder 

 tarsi ; in $ , the base of the 1st and the whole of the last four joints in 

 every tarsus black-brown. Wing neuration light coloured in the intervals 

 between the dark fasciae ; radius in $ meets the anterior basal cell at a 

 distance from the cell's end less than the cell's apical width. Apical joint 

 in the superior J appendages rounded externally, flattened beneath, and 

 . subtruncate at its sub-concave extremity ; close to its basal articulation, 

 beneath, arises a staff-like process, suddenly flexed at the base, and 

 barbed on one side with testaceous bristles at the tip. Wing, 3 to 3"25 

 mm. long . 4. P. compta, sp. noT. 



a — Tibiae wholly with whitish hair, as are also the 1st and 2nd joints in the <? , 

 or the Ist joint in the ? , tarsus dorsally ; the last three joints in the $ 

 tarsus, or four in the ?, black or grey 4. 



b — Legs darker; 1st and 2nd joints in the fore tarsus, 1st joint in the hinder 

 tarsi, glossed dorsally with light fawn colour or whitey-brown, leaving 

 the last three joints in the fore tarsus and the last four joints in the 

 hinder tarsi blackish. Wing neuration dark throughout ; radius in $ 

 meets the antei-ior basal cell at a distance from the cell's end subequal 

 to the cell's apical width. Apical joint in the superior $ appendages 

 globular, armed at its inferior base with a long, curved, nude, black spur. 

 Wing, 3 to 3'5 mm. long 5. P. extricata, ap. nov. 



4 — (3a) Fringe of the wing's apex glossed on the shorter hairs near the margin with 

 light yellowish, from the posterior branch of the radins to the pra- 

 brachial nervure, and glossed on the longer hairs with impure whitish a, 

 very little farther in both directions, the margin of the wing remaining 

 blackish. In the J wing the radius ends in the cross vein that closes the 

 anterior basal cell. Wing, 3 to 3'5 mm. long ..2. P. mutua, sp. nov. 



a — Fringe of the wing's apex whitish from about the anterior branch of the 

 radius to the posterior branch of the pobrachial nervure. Superior ^ 

 appendages nearly as in the preceding species. Anterior spiracular 

 appendages of the J thorax furnished each with a long curved lock of 

 hair ; the appendage itself rarely protruded, but, when it is so, sub- 

 cylindrical. Wing, 2'25 to 2'5 mm. long 3. P. cognata, sp. nov. 



5 — (la) Pubescence on the $ notura black and velvety anteriorly, rising behind intc 

 a transverse crest immediately before a light ochreous transverse fascia, 

 close to the wings. Frons in the i crowned conspicu jusly with a copious- 

 tuft of long, snow-white hair, set off with black. Wing, 3'5 to 4 mm. 

 long ' 6. P. nubila, M.erig. 



a — Pubescence on the $ notum rounded in contour anteriorly, and not shortened 

 to a velvety pile in front ; that on the pronotum flavescent, followed on 

 the mesonotum by yellowish-brown. Frontal tuft in $ inconsiderable y. 

 the scantier snow-white hairs, with change of posture, become duller or 

 of a yellowish tint, with a few black streaks interspersed, and the hair 

 on the vertex is light brownish, or brownish-yellow, mixed with black. 

 Wing, 3 to 3-5 (Loch Maree, 2-25 to 3) mm. long .. 



7. P. trivialis, sp. nov. 



