240 THE CANADIAN ENTOMOLOGIST. 



Tipula yusou, sp. n. 



Head and thorax blackish; postnotum blackish; abdomen 

 yellow with three dorsal brown longitudinal lines and one median 

 stripe; wings pale greyish brown variegated with hyaline. 



Male: length 15 mm.; wing 19.2 mm.; antennae 4-5 mm. 



Female: length 23 mm.; wing 21 mm. 



Male: Palpi and frontal prolongation of the head dark brown, 

 the latter very long; antennae, segment 1 very long; scapal seg- 

 ments yellow, segment 3 yellow basally darkening into brown at 

 the tip, remaining segments dark brown, the enlarged base even 

 darker, front, vertex and occiput dark brown. 



Pronotum dull yellowish brown. Mesonotal praescutum light 

 brown with three darker brown stripes of which the median one is 

 elongate cuneiform, its narrowed point ending just before the 

 suture; scutal lobes dark brown; scutellum dull yellow with an 

 indistinct, narrow darker line; postnotum dark brown. Pleura 

 dark brown. Halteres pale, the stem browner before the knob. 

 Legs, coxae brown on the outer face, the tips yellow; trochanters 

 yellow ; femora yellow, becoming brown at the tip ; tibiae and tarsi 

 brown. Wings, basal half pale yellowish, apical half more brown, 

 cells C and Sc yellowish; stigmal blotch darker brown, irregular; 

 hyaline blotches as follows: a large blotch across the wing before 

 the cord ; a narrower one beyond the cord; a large blotch in the 

 caudal portions of cells 1st A and 2nd A; cell M pale in the middle. 

 Venation, see plate XVI, figure 1. 



Abdominal tergites 1-7 dull yellow with a narrow dark brown 

 median stripe; segments 3-7 with a shorter and narrower stripe 

 near the lateral margin of each scierite; segments 8—9 dark brown; 

 sternites dull yellow, also with a distinct, narrow median vitta. 

 Male hypopygium (Lateral aspect, see plate XIX, figure 1) : 9th 

 tergite from above, with the caudal margin deeply and broadly 

 rounded, the edge with abundant chitinized teeth, the lateral 

 angles notched ; 8th sternite, viewed from the side triangular, the 

 caudal end with a dense bunch of orange coloured hairs; 9th ster- 

 nite rather large, oval, bearing on its pleural region a group of 

 appendages as follows: the more dorsal a large, fleshy, sigmoid 

 lobe, very densely clothed with long delicate hairs, ventrad and 

 entad of this a large bifid appendage whose caudal branch ends in 



