Teg AN ACCOUNT OF BRITISH FLIES. 
to state that “the total habitus of the Zygoneure being more like 
that of the former (Cecidomyide) than of the latter (AZycetophilide), 
and the tibial spurs being so very short,that in some species they can 
only be discovered by the closest scrutiny, I think I may be justified 
if I add them to the Cecidomyide, though in many respects they 
agree with the genus Scéara, which has its place amongst the Myceto- 
philide.”* But in other characters it approaches very closely to 
Sciara, and so it is placed amongst the Mycetophilide. No doubt it 
is a transitional form between the two families, and I see no reason 
why it should be placed one side of the line more than another ; but 
as it is so placed by Brauer, and as this work follows his classifica- 
tion, it is placed in the present family. 
“SS 
FIG. 22.—Wing of Zygoneura. 
The. characters of the genus are as follows: Ocelli present, three 
in number. Labium bilobed. Palpi 3-jointed, curved downwards. 
Antenne 16-jointed: in ¢ verticillate and pedicelled joints; in ? 
pubescent, joints sessile. Thorax elliptical. Branches of fourth 
longitudinal vein very arcuate at the base. Halteres long. Tibial 
spurs small or absent. One species is recorded in England, and is 
somewhat scarce. 
Z. stiarina, Mg. 
Black, shining thotax. First part of the fourth longitudinal vein 
Pad 
pale; rest of veins black. Halteres testaceous. Palpi yellow. - 
Antenne in ¢ as long as body; in 9 shorter than body. Legs 
yellow ; tarsi dark. Found in summer and autumn in underwoods. 
At the next genus we enter the second section, viz., the AZyceto- 
philine. 
GeEnus.—Cordyla, Mg. = Pachypalpus, Macq., Zett. 
The characters of this genus are as follows: Body narrow. Ocelli 
two, small, contiguous to the eyes. Palpi thick at base, short. An- 
tenne incrassated, short and thick. Number of joints vary in sexes 
and species, and also in form. Wingsrather short. Abdomen some- 
what compressed and slender. Legs short; tibiz armed with longish 
spurs. The veins of the wings resemble AZycetophila. The larve 
also are said to resemble those of JZycetophila, one C. crassipalpa, 
Macq,., has been figured and described (larva and pupa) by Dufour.t 
* Dip. N. America, pt. i., p. 7. 
t+ Ann. des Sc, Nat., 2e series V., xii. and xiii. (pp. 5-60 and 148-163). 
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