DURHAM DIPTERA. 4 1 



III. 



76 (77). V,5.a. and V.5.b, converging at their ends. 



32. Mycothera, Winn. 



77 (76). V.5.a. and V.5.b. diverging at their ends. 



78 (79). V,4. forking before the end of 0.4 1 ; X.4. longer than 



V.3 1 . 30. Exechia, Winn. 



79 (78). V.4. forking beyond the end of 0.4 1 ; .X.4. shorter 



than V.3 1 . 36. Phronia, Winn. 



80 (39). Only two ocelli present (VI. i). 



81 (82). V.I .a. incomplete; forks of V.4. and V.5. about the 



same length. 27. Mycetophila, Mg. 



82 (81). V.I .a. bending down into V.l.b. in front; forks of V.4. 



and V.5. of unequal length. 

 83(84). V.I .a 2 forming an equal-pronged fork with X.I .a.; 



V.4.b. often not reaching the margin. 



25. Cordyla, Mg. 

 84 (83). V.I. a 2 longer than X.l.a. ; V.4.b. always reaching the 



margin. 26. Dynatosoma, Winn. 



List of the few Local Species in the Museum. 



Note. — In the notes of local species $ stands for male, ? for female. 

 In the Museum collection the males are placed in the left hand row, the 

 females in the right hand one. 



27. Mycetophila, Mg. 



180. Mycetophila punctata, Mg. 

 Common. 



195. Mycetophila cingulum, Mg. 



Bishop Auckland, 2 ? , October-November, 1901. 



43. Glaphyroptera, Winn. 

 256. Glaphyroptera fascipennis, Mg. 



Bishop Auckland, 1 ? , September, 1900. 



52. Lasiosoma, Winn. 

 289. Lasiosoma hirtum, Mg. 



Bishop Auckland, 2 $, May, 1900. 



