DURHAM DIPTERA. 39 



III. 



36 (37). V.I .a. incomplete, or if complete ending in the costa 



beyond the little cell, 0.3 1 . 49. Polylepta, Winn. 



37 (36). V.I .a. always complete and ending in the costa 



always above or before the little cell, 0.3 1 . 



48. Empalia, Winn. 



38 (27). V.3. not forked (IV. 5). 



Sub-Family Mycetophilin^e. 



39 (80). Three ocelli present. 



40 (61). Costa reaching beyond the end of V.3. 



41 (44). V.5. not forked. 



42 (43). V.4. not forked, X.4. long, and in a line with V.3., as 



if its base. 39. Azana, Wlk. 



43 (42). V.4. forked, X.4. only a little longer, or as long as 



V.3 1 . 49. Acnemia, Winn. 



44 (41). V.5. forked. 



45 (56). Base of the fork of V.5. before or under the base of 



the fork of V.4. 



46 (53). V.l.a. and V.l.b, united by a X-vein. 



47 (48). The ocelli about equally large ; V.I .a. broken off at 



X.l.b. (Syntemna, Winn.) 



48(47). Ocelli of unequal size; V.l.a. not broken off, but 

 ending in the costa. 



49 (50). X.4. of the same length as V.3 1 . 



45. Anaclinia, Winn. 



50 (49). X.4. twice as long, or at least distinctly longer than 



V.3 1 . 



51 (52). Costa reaching far or very far beyond the end of V.3. 



46. Boletina, Staeg. 



52 (51). Costa reaching very little beyond the end of V.3. 



47. Leptomorphus, Curt. 



53 (46). No X-vein between V.l.a. and V.l.b. 



54 (55). Tip of 0.4 1 reaching beyond the middle of the wing ; 



the base of V.4.a. and of V.5.a. invisible. 



44. Leia, Mg. 



55 (54). 0.4 1 moderately long and always ending before the 



middle of the wing, the base of V.4.a. and of 

 V.5.a. distinct. 34. Docosia, Winn. 



