66 DURHAM DIPTERA. 



XII. 



Sub-Family B. — Ramphidin^e. 



1 (2). Proboscis at least twice as long as the head. 



101. Ramphidia, Mg. (698. longirostris, Mg.) 



2 (1). Proboscis shorter than the head. 



3 (4). O. (/.<?., discal cell) present. Antocha, O-Sack (103) 



4 (3). O. absent. 



5 (6). V.4.a. not forked. 



103. Orimarga, O-Sack. (699. virgo, Ztt.) 



6 (5). V.4.a. forked. 



104. Thaumastoptera, Mik. (701. calceata, Mik.) 



Sub-Family C. — Eriopterin^e. 



1 (10). Wings conspicuously hairy at any rate on the veins. 



2 (3). Wings conspicuously hairy on the whole surface. 



Rhypholophus, Kolen. (110) 



3 (2). Wings conspicuously hairy on the veins only. 



4 (5). V.3. branches from V.2.b. X.5. much nearer the 



base than X.4. Hence 0.5 1 much shorter than 

 0.4 1 . Molophilus, Curt. (109) 



5 (4). V.3. branches from V.2 1 . X.5. in line with X.4., 



hence 0.5 1 =0.4 1 . 



6 (7). V.7. bent upwards. 0.6. widest in the middle (IV. 20 



is inaccurate, V.7. should have bent upwards, and 

 ended about over the o). Erioptera, Mg. (Ill) 



7 (6). V.7. straight. 0.6. widest at the end. 



8 (9). X.l.b. much before the end of V.l.a. Wings spotted. 



Acyphona, O-Sack. (108) 



9 (8). X.l.b. at the end of V.l.a. Wings clear. 



107- Chilotrichia, Rnd. (711. imbuta, Mg.) 



10 (1). Wings not hairy on the cells, and very slightly on the 



veins. 



11 (14). 0.2. b. very short, not more than half as long as O.3., 



and shaped like an equilateral triangle. 



12 (13). X.2. present. Empeda, O-Sack. (105) 



13 (12). X.2. absent. Gonomyia, Steph. (106) 



14 (11). 0.2.b. long, and like an isoceles triangle (IV. 19). 



