23 [Febi-uary, 



very small, and only visible under a strong lens ; J abdomen stout, hjpopy- 

 gium small, disclosing, when protruded, a slender, dusky ventral process, anal 

 organ yellow and minute ; haUeres with a pale stem... 



I — 5 mm. propinqua, n xp. 



29 (16) HaUeres yellow. 



30 (31) Frons very long and narroio ; highly glossy. 



(J "^ . Thorax and abdomen deep black, th'^ former shining ; frons about one-third 

 longer than broad, frontal bristles weak, iiuier bris'le of lower frontal row close 

 to the eye margin, and almost vertically underneatli the outer one, four strong 

 supra-antennal bristles, the upper pair much wider apart than usual, $ paljji 

 large and black, with long and stout marginal bristles, ? normal and yellow ; 

 wings dark grey, fringe very short, cosia ((J) distinctly less than half tlie wing 

 length, and 1 half as long again as 2, $ quite to middle of wing, and 1 about as 

 long as 2 ; legs brownish-black, only fore coxte yellow in S > but in the 9 ail 

 the coxae are yellow, besides the fore legs and inner third of middle femora; hind 

 femora dilated, tibial cilia fairly large and not crowded ( J ), but rather small 

 and closer together ( ? ) ; fifth and sixth abdominal segments rather glossy in 

 both sexes ; hypopygium of medium size with a small bristle at caeli lower 

 corner, and a small black ventral jirocess, anal organ small and dusky yellow .. 



1 — 15 mm. minor, Zett. 



31 (30) Frons dnll and of ordinary form. 



i2 (33) Legs yell oivish-brotun. Cilia on hind fibias large and sparse. 

 J?. Thorax and abdomen black ; frons about one-third broader than long (c?), 

 rather less ( ? ), under pair of supra-antennal bristles half the size of the upper, 

 tlie latter large, antennse rather large and black ( (? ), of ordinary size and brown 

 or reddish-brown ( ? ), palpi pale yellow ; wings nearly clear and thin veins 

 rather faint, costa fully half the wing length, 1 about equal to 2 (J), a trifle 

 longer ( ? ), inner branch of second thick vein joins costa at a much larger angle 

 than does first thick vein ; hind femora dilated, tibia! cilia only ten or eleven in 

 number ; hypopygium small, with a small yellow anal organ, and a black flap- 

 like ventral process 1^ — 2 mm. uliginosa, n. sp. 



33 (32) Legs yellow. Cilia on hind tihiFe rather weak and numerous . 



34 (35) First costal division distinctly shorter than second ; fringe short. 



$ ? . Thorax yellow, red, or dusky red ; abdomen black, with the venter yellow, 

 sixth segment of $ generally tinged with yellow (in immature examples the last 

 three, as well as the first two, segments are more or less yellow) ; frons rather 

 broader than long, grey or red, upper pair of supra-antennal bristles large, under 

 pair not half the size, antennsB red or yellow ; wings yellowish and veins brownish- 

 yellow, costa well beyond middle of wing ; legs yellow, hind femora with the 

 apex dark, and fringed beneath with long hairs, tibial cilia fifteen or sixteen in 

 number, being particularly small and crowded in the upper quarter of the shaft ; 

 hypopygium large and grey, inner parts rarely exposed, but occasionally a yellow 

 sub-anal body is visible, and a pair of black ventral processes, the left hand one 

 being broader tiian the right, anal organ clear yellow. ..li — 2 mm. flara. Fall. 



35 (34) First costal division longer than second, and as long as second and third 



together ; fringe only moderately short. 



