36 MYCETOPHILID^E. 



fourth twice as long, slender, flexible. Antennae filiform, compressed, 

 sixteen-jointed, about half the length of the body, or rather shorter. 

 Thorax short. Wings moderately broad ; subcostal vein slightly curved 

 forward towards its tip, ending at very little beyond half the length, 

 often united with the costal, connected by a transverse veinlet near its 

 tip with the radial ; radial straight, ending at about seven-tenths of 

 the length ; cubital springing from the radial at before the middle of 

 the wing, near which it forms a hardly obtuse angle at its junction with 

 the prsebrachial transverse, and is thence straight to the end, which is 

 at the tip of the wing ; subapical forked at beyond the middle of the 

 wing ; fore fork ending at some little distance behind the tip of the 

 wing ; subanal forked at about one-third of the length of the wing, its 

 forks straight ; anal ceasing at a short distance from the posterior mar- 

 gin ; humeral veinlet very near the base ; areolets twelve the hume- 

 ral, the subcostal, the radial, the prasbrachial, the pobrachial, two cvM- 

 tal, the subapical, two externo-medial, the anal, and the axillary ; radial 

 and cubital veins each divided by a transverse veinlet ; posterior mar- 

 gin forming a slight acute angle at full thrice the length of the humeral 

 areolet from the base. Halteres rather short. Abdomen more than 

 twice the length of the thorax, somewhat straitened towards the base. 

 Legs long, slender ; coxse and femora slightly hairy ; tibiae slightly se- 

 tose; spurs of moderate length. Male. Antennae about half the length 

 of the body. Abdomen nearly cylindrical. Fern. Antenna) much less 

 than half the length of the body. Abdomen elongate-fusiform. 



The Sciophilce frequent herbage and leaves of trees in shady 

 woods, and in general appearance much resemble the Mycetophila. 

 The two cubital areolets in their wings at once distinguish them 

 from all the other genera of this Family, and the variations of 

 the form of the first cubital areolet will serve to arrange them in 

 the following groups : 



a. Subcostal vein of moderate length. 



b. First cubital areolet thrice longer than broad. Species 1. 

 b b. First cubital areolet nearly thrice longer than broad. Species 2. 

 b b b. First cubital areolet more than twice longer than broad. Spe- 

 cies 9, 12, 22. 

 b b b b. First cubital areolet twice longer than broad. Species 5-7, 



10, 18, 25. 



b b b b b. First cubital areolet nearly twice longer than broad. Spe- 

 cies 3, 8, 21. 



b b b b b b. First cubital areolet much longer than broad. Species 

 4, 13-15. 



b b b b b b b. First cubital areolet a little longer than broad. Species 



11, 16, 26. 



b b b b b b b b. First cubital areolet not longer than broad. Species 



17, 19, 20. 

 a a. Subcostal vein very short. Species 23, 24. 



