DURHAM DIPTERA. 85 



XIII. 135. 



23 (28). Wing tip distinctly darkened, so that there is a con- 



spicuous light band between it and the stigma. 



24 (25). The pale band beyond the stigma includes nearly all 



of 0.4.b.b. 



811. Tipula horiensis, Mg. 

 Raby, 1 $, 2 ?, 29-5-01 ; Bishop Auckland, 1 $, 

 1-6-OT. 



25 (24). The pale band beyond the stigma only includes just 



the base of 0.4. b.b. 



26 (27). Pleurae with a sharp-edged dark longitudinal stripe. 



(807. rufina, Mg.) 



27 (26). Pleural stripe absent. 



808. Tipula longicornis, Schum. 

 Bishop Auckland, 1 $, 27-6-02; Harperley, 2 $, 2 $, 

 28-6-02. 



28 (23). Wing tip only slightly darkened, pale band not very 



conspicuous. (Note. — This is not a very good 

 character, as sometimes in the following the pale 

 band is fairly conspicuous). 



29 (32). V.2.a. cut short and not joined to the costa. 



30 (31). First antennal joint dark, at least at the base. 



814. Tipula varipennis, Mg. 

 Barnard Castle, 2 $, June, 1900; Wearhead, 2 $ f 

 5-6-01. Some of the two foregoing have V.2.a. 

 cut short, and in some it reaches the costa. I 

 -cannot believe that this small variation indicates 

 a different species. 



31 (30). First antennal joint all yellow. (813. hortulana, Mg.) 

 82 (29). V.2.a. complete and ending in the costa. 



33 (34). V.4.a.a. and V.4.a.b. not approximated at their ends, 



wings very slightly marmorated. 



(803. obsoleta, Mg.) 



34 (33). V.4.a.a. and V.4.a.b. a little approximated at their 



ends. 



