320 TIPULID^E. 



cure situation. All however were not committed to the same 

 burrow, for she every now and then shifted her station, but not 

 more than an inch from where she bored last." 

 Synopsis of the British species : 



a. Fork of the first externo-medial vein with a petiole between it and 

 the discal areolet. 



b. Wings of one colour, excepting the rather darker fore border and 

 the stigma, and some distinct brown longitudinal marks, or with 

 only three small brown spots, two on the hind border and one on 

 the subanal vein. T. notatts, Schumm. Species 1. 

 b b. Wings much variegated, with three large brown spots on the 

 fore border, three paler brown spots on the hind border, and a 

 small brown spot on the anal vein. T. maculate, Schumm. 

 Species 2. 



b b b. Wings more or less variegated with grey and white, of almost 

 one colour in some species. T. marmorata, Schumm. 

 c. Sides of the thorax with some conspicuous blackish-brown 



streaks. Species 3. 

 c c. Sides of the thorax without brown streaks. 



d. Thorax with four brown stripes, which have not darker bor- 

 ders. Species 4-7. 

 d d. Thorax with four (rarely three) brownish-grey or grey 



stripes, with darker brown borders. Species 8, 9. 

 d d d. Thorax with three generally brown bordered stripes, of 

 which the middle one is intersected by a dark brown stripe. 

 Species 10. 



b b b. Wings more or less variegated. Fore border darker than the 

 wings elsewhere. Subanal vein towards its tip, the veinlet be- 

 tween it and the third externo-medial, wholly clouded with 

 brown ; the pobrachial areolet of one colour, without paler spots 

 at the tip, the apical space of one colour, or with white bands. 

 T. costato-nervosce, Schumm. 



c. Abdomen with darker lateral stripes. Species 11, 12. 

 c c. Abdomen with a darker dorsal stripe. Species 13. 

 b b b b. Wings of one colour, limpid, with a dark brownish-yellow, 

 brown or blackish fore border. Apical part of one colour, only 

 the areolets in front of the discal areolet at the base more or 

 less, or almost wholly, limpid. T. costates, Schumm. Species 

 14-18. 



b b b b b. Wings almost of one colour, with the costa not distinctly 

 darker ; the inner costal areolet partly whitish. T. imicolores, 

 Schumm. 



c. Abdomen without stripes. Species 19-22. 

 c c. Abdomen with a darker dorsal stripe. Species 23, 24. 

 h b b b b b. Wings of one colour, occasionally darker in the apical 

 part, with a white band which proceeds from the costa at the 



