1893.] 129 



obovoid, the 2nd subglobular ; 3rd elongate, subequal in length to the 

 two formei' combined, stout and cylindrical in its basal two-thirds, and 

 then tapering ; the other twelve joints moniliform, with oval nodules at 

 rather wide intervals and subcompressed campanulate verticils of hair — 

 the hairs sometimes incurved at the tips in life. Wings blackish-grey, 

 with fringes to match, except the apical fringe, which is glossed with 

 white from about the posterior branch of the radial to the anterior branch 

 of the pobrachial nervure ; within the region of bristling hair are the 

 following whitish markings : — a small patch at the base of the wing, a 

 tuft shortly before the end of the axillar nervure, and a rather broad, 

 straight, transverse band, in which are both the forks, on the customary 

 nervures, about the middle of the wing. Length, 2 to 2'5 mm..., 



29. P. incerta, sp. nov. 



„ i — Radius forked .considerably beyond the pobrachial fork, opposite the end of 

 the anal nervure, and confluent with the cubitus at a distance beyond 

 the anterior basal cell subequal to twice the cell's apical width ; pobra- 

 chial nervure forked very little beyond the end of the axillar nervure. 

 Antennse in $ actually 16-jointed, reaching to the base of the wing ; 

 first two joints very short, clothed with scales and some hair, the Ist as 

 long as broad, subcylindrical, the 2nd sphseroidal, stouter, contiguous 

 with the much smaller globular 3rd joint ; joints 3 — 16 moniliform with 

 globular nodules (the last two nodules contiguous and approximated to 

 the antepenultimate, the others at rather distant intervals), beset with 

 cupuliform verticils of hair; each verticil, excepting the last or last two, 

 contains a pair of chitinous bristles, inserted with the hairs, curved half 

 a spiral turn in opposite directions, the spiral more extended or more 

 oblique than in P. soleata. Wings light brownish-grey, with glossy 

 fringes to match, and with a conspicuous pair of rounded spots (one at 

 the radial fork, the other on the branches of the pobrachial and on the 

 postical nervure near the pobrachial fork), and a short longitudinal 

 streak near the base of the prsebrachial nervure, blackish ; the hairs 

 towards the ends of the longitudinal nervures also (but less distinctly) 

 blackish. Wing, 2 to 2-25 mm. long 30. P. revisenda,sT^.\-iov. 



Species of the 1st Section oe Pstchoda. 



(Analytical Key, Steps 7, 6a, 5a, 2a, 1). 



1 Wings spotless 2. 



„ a — Wings spotted 4. 



2 — (1) Inferior ^ appendages armed each with three tenacular spinules. Pubes- 

 cence of thorax light brown ; that of the abdomen dense and brownish. 

 Wing, 2 to 2-5 mm. long 1. Fs. lucifuga (Hal. MS.), Walker. 



„ a — Inferior S appendages each with one tenacular spinule 3. 



3 — (2a) Basal joint in the superior $ appendages elongate, one-third longer than 



the terminal joint. Wing, 1'5 to 2"25 mm. long... 



2. Ps. phalcenoidex, L. 



