DURHAM DIPTERA. 37 



III. 



1 (8). Coxae moderately long. 



Sub-Family Sciarin./e. 



2 (3). Wings and halteres wanting. 23. Epidapus, Hat. 



3 (2). Wings and halteres distinctly present. 



4 (5). Wings small, shorter than the body. 



22. Bradysia, Winn. 



5 (4). Wings longer than the body. 



6 (7). Antennas with round, long stalked, and thickly verti- 



cillate flagellar joints. 24. Zygoneura, Mg. 



7 (6). Antennae with roundish or longish flagellar joints, 



which are not stalked, and only slightly hairy 

 (II. 3). 20. Sciara, Mg. 



8 (1). Coxae very much lengthened. 



9 (26). V.4. branching from V.5. far beyond the base of the 



wing, near the middle. 



10 (11). V.3. not forked. 



Sub-Family Diadocidin^e. 



63. Diadocidia, Ruthe'. 



11 (10). V.3. forked in front, the upper branch sometimes 



looking like a X-vein. 



12 (17). V.3.a. very long. 



Sub-Family Mycetobin^e. 



13 (14). V.3. forking just at X.4. 60. Mycetobia, Mg. 



14 (13). V.3. forking a little beyond X.4. 



15 (16). The fork of V.3. longer than the fork of V.4. 



61. Ditomyia, Winn. 



16 (15). The fork of V.3. shorter than the fork of V.4. 



62. Plesiastina, Winn. 



17 (12). V.3.a. short (IV. 6), and sometimes so much at right 



angles with V.3. as to appear as a X.3. 



18 (19). X.4. distinctly apparent. 



Sub-Family Bolitophilin^e. 



59. Bolitophila, Mg. 



19 (18). X.4. apparently absent, as V.4. coalesces for some 



distance with V.3., so that the end of V.4. looks 

 like a forked branch of V.3, (IV. 6). 



