134- THE CANADIAN ENTOMOLOGIST 



Described from alcoholic material. 



Head, rostrum and palpi brownish black. x\ntennae biownish black, the 

 distal segments a little paler, if bent backward extending to (?) or beyond (c^) 

 the wing-root ; flagellar segments in the J' rather elongate. 



Mesonotum and pleura dark brown, the dorso-pleural membranes paler. 

 Halteres elongate, pale, the knobs slightly darker. Legs with the coxae and 

 trochanters obscure yellow ; remainder of the legs light brown, the tips of the 

 femora and tibiae slightly darker. Wings with a strong dusky grey tinge; wing- 

 base slightly yellowish; stigma oval, darker grey; exceedingly faint markings 

 at the origin of R and along the cord; veins dark brown. Venation: S long, 

 S ' tx'.ciiiling to about four-fifths the long R_., S^,^ removed a short distance 

 from the tip of S >; R^ long, strongly arcuated at origin, in alignment with 

 R.. + 3; Ri. + 8 rather long, about twice the deflection of R^^^i:; very faint; 

 beins R^ and R< divergent; cell R^ at the margin wider than either cells 2nd 

 Ri or R.f; petiole of cell Mi about as long a.s the cell; basal deflection of Cu' at 

 about one-third the length of cell 1st M^^; -upernunierary crossvein in cell M a 

 short distance beyond the origin of R, . 



Abdomen dark brownish black. Male hypopygium with the ninth tergitt 

 bifid, the lobes narrowly rounded at their tips and provided witli blackene* 

 spines; pleurites short and stout, the apex of each produced mto a flattened 

 lobe; outer pleural appendage very broad, profoundly bifid, the dorsal blade 

 flattened, with the inner margin provided with four or five appressed acute 

 teeth ; the ventral blade is narrower, a little shorter, at the tip with a few acute 

 erect spinules ; inner pleural appendage flattened, very short and high, rapidly 

 narrowed to the blunt apex, provided with numerous setae. Ovipositor long 

 and slender, the tergal valves upcurved, horn-color. 



Habitat. — Idaho. 



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



Allofopotype, ?. 



Ilhaphidolabis (Hhaphidolaliis) Kllb!^e^silis, new species. 



General coloration (in alcohol) brownish yellow, the praescutum with a 

 conspicuous dark brown stripe ; antennae with twelve segments ; wings sub- 

 hyaline; stigma faintly darkened; cell R' sessile or subsessile ; abdomen dark 

 brown. 



Male. — Length about 5.2 mm.; wing 6.7 mm. 



Female. — Length about 6.5 mm. ; wing 7.4 mm. 



Described from alcoholic material. 



Rostrum and palpi brown. Antennae with twelve segments, dark brown, 

 the last segment one-half longer than the penultimate. Head dark brown. 



Pronotum obscure brownish yellow, broadly dark brown medially. Mes- 

 onotum brownish yellow, the praescutum with a conspicuous median dark brown 

 stripe that is narrowed behind, ending before the suture ; lateral stripes very 

 indistinct. Pleura brownish yellow. Halteres pale, the stem darker. Legs 

 with the coxae and trochanters brownish yellow ; remainder of the legs brown, 

 the tarsal segments darker. Wings subhyaline, iridescent, the stigmal area faint- 

 ly brownish ; veins dark brown. Venation : R moderately elongated, strongly 

 arcuated ; cell R3 sessile to very short petiolate ; outer deflection of Rs less than 

 its own length 4rom the tip of Ri; cell 1st M2 open; cell Mi present, the branches 



