lOO MAINE AGRICULTURAL EXPERIMENT STATION. I9IO. 



ing the apex of the wing from the tip of R^ to the tip of Cu^, 

 apex without hyahne spot; subcosta ends in costa opposite apex 

 of small cell R^ ; subcostal crossvein a little before the middle 

 of this cell, the latter but little longer than broad; costa notice- 

 ably produced beyond R^+g ; petiole of the media about half as 

 long as Ml ; the cubitus forks under the base of the R-M cross- 

 vein. Halteres yellow. Ithaca, N. Y. 



A female specimen from Montreal differs in having the top 

 of the head pale brownish, no fine brown lines on the mesono- 

 tum, and the brown of the second and fourth segments of the 

 abdomen more extended, produced into a fine line to the pos- 

 terior margin ; fore metatarsus and tibia subequal. 



2. Necempheria didyma Loew. 

 1869. didyma Loew, Berl. Ent. Zeitschr. XIII. 136 (Bmpheria) . 

 1866. bimacnlata Loew, Berl. Ent. Zeitschr. X. 6 (Sciophila). 

 Female. Length 5.5 mm. Yellowish. Flagellum of the an- 

 tennae fuscous black, palpi black. The first segment of the ab- 

 domen fuscous black excepting the sides and posterior margin, 

 the intermediate segments yellow each with 2 transverse black 

 spots on the posterior margin. Legs yellow, tarsi blackish to- 

 v/ard their tips. Wings with cinereous tinge, toward the costa 

 more yellowish ; the costa produced slightly beyond R4+5 ; sub- 

 costal crossvein at or distad of the middle of cell R^, this cell 

 of medium size and much shorter than the petiole of the media; 

 the first section of the radial sector and the R-M crossvein cov- 

 ered by a cinereous fuscous spot, apex of the wing and apex of 

 the posterior angle widely cinereous fuscous. Halteres yellow. 

 Recorded from Canada. 



3. Necempheria nepticida Loew. 

 1869. nepticula Loew, Berl. Ent. Zeitschr. XIII. 137. {Bm- 

 pheria). 



Male and female. Length 2.5 mm. Pale yellow, palpi black, 

 vertex and sometimes the mesonotum dusky yellow ; the first, 

 third and fifth abdominal segments black, the anterior half of 

 the second blackish, the sides of the first segment in mature 

 or the whole of the segment in immature specimens yellow. 

 Wings (fig. 95) subhyaline, lightly cinerescent ; costa produced 

 far beyond R4+5, subcosta is paler and more slender than the 

 other veins, becomes obsolete at the apex; subcostal vein is 



