114 'May, 



S ? . Thorax and abdomen black ; supra-antennal bi'istles large and nearly 

 equal, S antennae rallier large, palpi yellow ; wings tinged but not deeply with 

 grey, 1 longer than 2 but barely as long as 2 + 3 ; legs brown, or dark 

 brown, fore tarsi of male not longer than tlie tibiae, uniformly thickened down 

 to and inclusive of the black terminal joint the first joint being somewhat 

 dusky and the intermediate joints yellow, tarsi of female longer than the 

 tibiae with only the first joint thickened and with all the joints dusky, the 

 fringe of stubby hairs on the hind femora particularly dense about the middle 

 where there is a sort of projection or shoulder breaking the outline of the 

 under-side ; male abdomen slender and rather hairy on the last 2 or 3 segments' 

 hypopygitim large with 3 or 4 strong bristles at the lower corners and about 

 the same number arranged diagonally on the sides, subanal body large but 

 rarely exposed, ventral plate small and black, anal organ long and slender, 

 yellow with a dusky base Is — If mm. humiUs, n. sp. 



46 (45) Hind femora without such hairs. 



(J ? . Very like humilis, but with the following di£Ferences : — male antennae only 

 of ordinary size ; the wings almost clear with a rather shorter costa, which with 

 the veins, both thick and thin, are distinctly finer and more delicate than in 

 humilis, whilst the 1st thin vein has a tendency to be recurved at the margin ; 

 all the joints of the fore tarsi yellow in both sexes with the exception of the 

 black terminal joint in the male, otherwise the legs darker than in humilis, 

 under-side of hind femora uniformly curved and only clothed with the usual 

 short and sparse hairs ; terminal segments of abdomen bare, but the marginal 

 hairs of the 6th long and conspicuous, h^popygium without bristles, at the 

 most with a long slender hair or two at the corners ; all else as in humilis... 



li — Ij mm. alticolella, n. sp. 



47 (44) Leffs more or less yellow. 



(7 ? . Comes very near both the preceding species but more particularly alticolella, 

 from which it is distinguished, besides the much paler legs, by the brownish- 

 yellow tint of the wings, the shorter costal fringe which is only moderately 

 long, by 1 being not only longer than 2 but also rather longer than 2 + 3, and 

 the 1 st thin vein more distinctly recurved at the margin ; by the absence of 

 the tiny bristles on the front tibiae of the male ; by the marginal hairs of the 

 last abdominal segment being small and inconspicuous, and the hypopygium 

 without bristles or hairs of any kind, and lastly by the anal organ being large 

 and stout and of a clear yellow throughout li — If mm. hortensis, n. sp. 



48 (39) Fore tarsi simple, or at any rate not strikingly thickened. 



49 (58) Salteres black. 



50 (55) Small species, not more than 1 mm. 



51 (54) Costa of male not fully to middle of loing. 



52 (53) Wings clear ; veins fine and delicate. 



$ 5 . Thorax and abdomen deep black, pleural bristles tender and equal ; frons 

 about \ broader than long, supi-a-antennal bristles moderately large and nearly 

 equal, the under pair, low down and close to the middle line, often hidden by 

 the antennte, palpi more or less dusky ; costa variable in male, sometimes 



