THE CANADIAN ENTOMOLOOIST 133 



yellow ; wings greyish yellow, the cross veins and deflections conspicuously seam- 

 ed with greyish brown ; male hypopygium with the outer pleural appendage 

 simple. 



Male. — Length about 6.5 mm. ; wing 8 mm. 



Female. — Length 7.8 mm. ; wing 8.4 mm. 



Described from alcoholic material. 



Rostrum and palpi dark brown. Antennae of the male long, if bent 

 backward extending about to the base of the abdomen ; scapal segments pale 

 yellowish brown, the flagellum dark brown. Head dark brown, the genae 

 paler. 



Thorax dark brown, with no stripes evident in alcoholic material. Halt- 

 eres pale, the knobs a little darker. Legs with the coxae and trochanters light 

 yellow ; femora yellow, broadly tipped with dark brown ; tibiae brownish yellow ; 

 tarsi pale brown. Wings with a faint greyish yellow tinge, the wing-base and 

 the costal and subcostal cells more yellowish ; stigma oval, dark brown ; con- 

 spicuous greyish brown seams at the origin of Rr; at Sc, along the cord and 

 outer end of cell 1st M2 and along the supernumerary crossveins ; veins dark 

 brown. Venation : Sc2 some distance from the tip of Sci, this distance slightly 

 variable ; Ri bent caudad at R which is inserted on R2 a little more than its own 

 length beyond the fork and on Ri about its length from the tip; R spurred at 

 origin, in alignment with R2+ 3; basal deflection of R-i I ^ and R in oblique align- 

 ment; petiole of cell Mi much shorter than this cell; basal deflection of Cui 

 slightly before midlength of cell 1st M2. 



Abdomen dark brown. Male hypopygium with the pleurites stout ; two 

 pleural appendages, the outer appendage simple, narrow at the base, gradually 

 widened to the squarely truncated apex, the outer margin and apex provided 

 with numerous small appressed spines ; inner pleural appendage a little longer 

 than the outer, gradually narrowed to the bluntly rounded apex, the surface 

 provided with setae. 

 Habitat. — Idaho. 



Holotype, J^, Moscow Mt., July 25, 1920 (R. C. Shannon). 

 Allotopotype, $. 

 Paratopotypes. 1 cf, 1 5< the latter teneral. 



This species and the next are of very considerable interest as being the 

 first American representatives of the group typified by L. (/.) trimaculata 

 (Zett.) of northern Europe. The genitalia are of a structure that differs in 

 several respects from that of the type of the subgenus Idioptera, however, and 

 it may be that all these species are not true members of Idioptera. It is with 

 great pleasure that this interesting fly is dedicated to Mr. Shannon as an ap- 

 preciation of his kind help in collecting Tipulidae in various parts ot the United 

 States. 



Limiiopliila (Idioptera) bifida, new species. 



General coloration (in alcohol) brownish black; coxae and trochanters 

 obscure yellow; wings dusky grey, the stigma slightly darker; no distinct darker 

 markings on the wing; male hypopygium with the outer pleural appendage pro- 

 foundly bifid. 



Male. — Length about 5 mm. ; wing 6 mm. 



Female. — Length about 6.5 mm. ; wing 6.7 mm. 



