MAY PLIES AND MIDGES OP NEW YORK 137 



dd The fascia lies proximad or over the crossvcin 



c The abdominal segments of the male each have brown posterior 



margins ; head brown, 3 mm 3. f u t i 1 i s 



ec The abdominal segments of the male have brownish fasciae or 

 spots near (interior margin of cadi; the female has a brown- 

 ish abdomen with paler posterior margins to the segments 

 f Three to five mm. in length ; pale yellowish ; abdominal fas- 

 ciae of the male pale brown ; dorsal stripes reddish or 



brown 4. c a r n e a 



ff Two and one half mm. or less in length; thorax brownish; 



dividing lines cinerous 4a. var. a. c a r n e a 



) Legs distinctly bicolored 

 c Wings spotted but not banded 



d Species with brown or black thorax and abdomen, pi. 37, fig.17 



(Greenland) - 5. p u 1 c h r i p e n n i s 



(W Pale (reddish or yellowish) species 



e Tibia with three rings; femur with one at the tip (=annu- 



latus Say) G. monilis 



ee Tibia not with three rings 



f Femur with two brownish rings near the apex ; wing with 

 about eleven brown spots (California and New Mexico) 



7. v e n u s t a 

 ff Femur with one ring 



g Abdomen of male pale yellow, black and brown fasciate ; 

 wing with apex from slightly before tip of R 1? grayish 

 brown and containing several whitish hyaline drops ; 



length 5 mm. (Washington) 8. g u 1 1 u 1 a r i s 



gg Abdomen brownish fasciate ; wing with apical half with 

 many mostly isolated brown spots ; length 3 to 4 nun. 



( New Mexico ) 9. b a r b e r i 



cc Wing with one or more cross bands 



d Femora and sometimes tibiae also with brown bands 



e Wing with median band and apical third of wing brownish, 

 marked w 7 ith several hyaline spots ; each femur with sub- 

 apical ring, tibia with basal ring ; length 3 to 4 mm. 



10. d y a r i 

 cr Apex of wing with band or spot, but no hyaline spots in it 



f Wings yellow, humeral crossvein brown clouded, brown fascia 



across wing and at apex of vein It,, each femur with 



apical and tibia with basal band ; tarsi white, apical joint 



brown ; length 3 to 3.5 mm. (New Jersey) . .11. j o h n s o n i 



ff A pale brown cloud near the tip of the wing also ; length 3 to 



5 mm 12. o r n a t a 



</<l Femora and tibiae not banded, or with only apices of femora and 



either bases or apices of tibiae slightly darkened 

 e Wing with one faint: brown band. Yellow species with three 

 thoracic stripes, metanotum, spots on pleura and sternum, 

 brownish black; apices of femora and bases of tibiae brown- 

 ish ; length 3 mm. ; female (Alaska) 13. a 1 g e n s 



