THE CANADIAN ENTOMOLOGIST 



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brownish. Legs with the coxa? and trochanters pale; femora and 

 tibiae light brown; tarsi towards the tips dark brown. Wings 

 with a grayish yellow suffusion; stigma pale brown, indistinct; 

 veins dark brown. Venation about as in cognatella: Sc ending 

 just before the origin of the sector; cell Ri very large; cross-vein 

 r-m very long; cell 1st M2 open by the atrophy of the' outer de- 

 flection of Ms; basal deflection of Cm at the fork of M. 



Abdomen dark brown, the tergal segments with the apical 

 third yellow so the abdomen appears broadly annulated; hypo- 

 pygium yellowish. Hypopygium of the cognatella type but dif- 

 fering notably in the details of structure: outer pleural lobe with 

 long bristles on the outer half along the margin and a single stout 

 bristle on the outer face near the base; pleural appendages as 

 follows: outer appendage (3) (Fig. 1) very long and slender, with 

 numerous hairs along the margin; pleural appendages 3 (Fig. 2) 

 bifid as in cognatella, but shorter and more powerfully constructed, 

 the dorsal arm blackened and strongly chitinized at its tip, the 

 two arms about equal; appendage d (Fig. 3) is rather stout with 

 about three tubercles before the apex each with a long bristle; 

 at the tip with a long, curved bristle. Penis-guard (Fig. 4) as 

 seen from the side shaped as in figure. Gonapophyses (Fig. 5') 

 with an acute spine near the base. 



6 



Fig. 7. — l-.i, Gonomyia kansensis, n. sp., hypopygial details; 



ventral liook of hypopygium. 



6, Molophilus ursus, n. sp. , 



