32 [February, 



a — Eadius confluent with, or imked by, a cross-vein to the cubitus beyond the 

 anterior basal cell 5. 



3 — (2) The postical and axillar nervures converge and meet the anal nervure either 



exactly at the inferior apical angle of the posterior basal cell, or quite 

 close thereto, so as to constitute a tripartite arrangement of nervures. 

 Wing obtusely ovate, with the apex at, or just below, the end of the 

 cubitus 4. 



a — The postical and anal nervures unite, apart from the axillar nervure, beyond 

 the posterior basal cell, usually as far beyond it as the width of the cell's 

 apex (but in P. mutua quite close to the cell) ; and the axillar nervure 

 either ends abruptly, or is linked by a cross-vein to the inferior apical 

 angle of the cell. Wing ovate, or ovate-lanceolate, with the apex usually 

 between the cubitus and the prsebrachial nervure, seldom at the end of 

 the cubitus. Antennae nearly as in Fericoma, Section I. See step 4a, 

 below Fericoma, Section II. 



i — The postical nervure ends in or at the cross-vein closing the posterior basal 

 cell; the axillar nervure either ends abruptly, or is obsoletely linked by 

 a fold or cross-vein to the inferior apical angle of that cell. Wing ovate- 

 lanceolate, seldom ovate Fericoma, Section III. 



4 — (3) Wing in $ pouched just beyond the anterior basal cell ; radius forked near 



the cell ; pobrachial forked still nearer to the cell, or at one-fourth of the 

 wing's length from the base of the costa. In $ the forks are sub-opposite 

 each other, at about one-third of the wing's length. Antennae shoi't, in 

 $ reaching to the wing's insertion, in $ shorter ; 1st joint short, sub- 

 terete ; 2nd stouter, ovoid ; the succeeding joints at first nodose, with 

 fusiform nodules at short intervals, but towards the tip moniliform, with 

 oval nodules also at short intervals ; flagellum hirsute, with spreading 

 hair. A single species, U. Juliginosa, Meigen. Wing, 3 to 3 5 mm. 



long .. Ulomyia. 



a — Wing not pouched in $ ; radial fork sub-opposite to the pobrachial fork, at 

 about one-half the wing's length. Antennae short, in £ not reaching to 

 the base of the wing ; 1st joint short, obovoid-oblong ; 2nd stouter, 

 globular ; flagellum nearly as ' in Ulomyia, but with shorter joints, 

 moniliform, with oval nodules at very short intervals, and hirsutai with 



verticils of spreading hair Fericoma, Section I. 



5 — (2a) Wing broad, obtusely ovate, rounded at the end of the cubitus; anal- 

 axillar region dilated in $ ; basal cells short, both the same length ; 

 radius confluent with the cubitus about as far from the end of the anterior 

 basal cell as the cell's apical width, and forked very shortly beyond the 

 fork of the pobrachial nervure. Antennae in $ 15-jointed ; 1st joint 

 moderately stout, oval ; the other fourteen joints moniliform, mostly with 

 oval nodules at rather wide intervals, and with cupuliform verticils of 

 hair. A single species. No. 31, F.fusca, Macquart (Syn. $ P. calceata, 

 Meigen; $ F. auriculata,G\xvt.). Wings brownish-black, with darker 

 markings at the end of the region of bristling hair, viz., a blotch on the 

 radial branches, and the cubitus extending from the fork to about opposite 



