22 [June, 



TIPULA. 

 Most reluctantly do I attempt any table of this genus at present ; 

 in fact, when I began this paper, I had made up my mind not to give 

 one, but I have come to the conclusion that, in the present state of 

 knowledge in England, an imperfect table is better than no table at 

 all, especially as I hope a few Lepidopterists may be induced to take 

 up these large insects, which cannot be nearly so difficult to manipulate 

 as the Pterophoridce. 



1 (40) Wings marniorated, spotted or streaked (always with something more 



than a pale longitudinal streak under the costa, or a pale spot or 

 diagonal band just before the stigma) , rarely the only distinct evidence 

 of the mottling is an indistinct pale spot near the middle of the lower 

 basal cell. 



2 (3) Three large brown spots against the costa, almost united on the margin, 



and occupying the whole length of the wing (very large species)... 



gigantea, Schrk. 



3 (2) The costa not occupied with three large conspicuous brown spots. 



4 (5) A dark blotch in the middle, between the postical and anal veins ; the 



wings indistinctly clouded, grey in $ , brownish-yellow in $ ... 



5 (4) No dark blotch between the postical and anal veins. 



6 (35) Disc of the wing marniorated, spotted or clouded, not streaked. 



7 (12) Thorax with three brown stripes, which sometimes have a darker margin, 



and of which the middle one is often divided by a dark line. 



8 (9) Thoracic stripes so broad that they occupy almost all the thorax, their 



margins not darker (the pale markings on the wing really make a 

 medial streak from base to tip) vittata, Mg. 



9 (8) J horacic stripes moderately broad, and with dark margins, the middle 



stripe divided by a darker line. 

 Wings distinctly marmorated in brownish and white ... truncorum, Mg. 



Wings almost wholly pale brown, only faintly with pale spots .. 



pabulina, Mg. 



Wings with four brown or brownish stripes, which are frequently mar- 

 gined with darker lines. 



The stripes on the thorax very little darker than the ground-colour, but 

 with brown margins ; {vide also T. rufina, Mg., distinguished by the 

 dark streak on the pleurae). 



14 (15) The inner brown margins of the two middle thoracic stripes so near 



together that they almost make a single thick line ; antenna! joints of 

 the male deeply incised excisa, Schum. 



15 (14) The two middle thoracic stripes at any rate divided in the middle ; an- 



tennal joints of the male not deeply incised.. 

 The thoracic stripes approximated in front and behind .... scripta,-Mg. 



The thoracic stripes not approximated behind ., nubeculosa, Mg, 



The stripes on the thorax darker than the ground colour, and without 



darker margins, the two middle ones narrowed behind and approximated. 



Wing tip distinctly darkened, so that there is a conspicuous light band 



between it and the stigma. 

 The pale sub-apical band includes nearly all the fourth posterior cell ; g 



antcnnaj not longer than the thorax ,, horlensis, Mg. 



