FUXGUS GXATS OF NORTH AMERICA. 185 



23. Mycomya reciirva n. sp. 



Female. Length 5 mm. Pale yellow ; face, cheeks, palpi 

 and 5 or 6 basal joints of antennae rufous yellow, apical joints 

 of antennae fuscous; front and occiput dull brownish black, 

 dusted with white. Thorax pale yellow, subopaque, appearing 

 as if dusted with white: dorsum with a few sparse, rather long 

 black hairs and 4 distinct reddish brown stripes. The inner 

 pair is approxim.ated. very narrow, beginning on the anterior 

 edge of the dorsum, tapering posteriorly and terminating a 

 short distance in front of the insertion of the scutellum ; lateral 

 bands broader, beginning a short distance from the anterior 

 edq-e of the dorsum and terminating acutely in the posterior 

 eci.^e. Scutellum with pale fuscous disk, bearing 2 moderately 

 long setae. Pleura somewhat fuscous posteriorly. IMetanotum 

 sordid with fuscous. Ground color of abdomen inclining to 

 .-^ulphur yellow ; basal 2-3 of the tergum of each segment pale 

 fuscous : a black band runs down the median dorsal line inter- 

 rupted at the pale edges of the segment. Venter and genitalia 

 uniform pale yellow. Legs pale yellow, lacking the whitish 

 dust of the thorax; posterior coxae each Avith an elongate fus- 

 cous spot ; all the femora at their point of insertion very nar- 

 rowdy but distinctly edged- with black ; hind tibiae with a row of 

 about 7 almost equidistant spines on their outer faces. Fore 

 metatarsus less than 1-12 longer than the tibia; setae of the hind 

 tibia nearly twice as long as the diameter of this member. Wing 

 grayish hyaline, lutescent along the costal margin; subcosta ends 

 in the costa before the distal end of cell R^ which is about twice 

 as long as wide : subcostal crossvein is at the middle of this 

 cell; R4+-, ends at the tip of the wing; the petiole of the media 

 is 0.7 as long as Mo ; the cubitus forks slightly proximad of the 

 R-M crossvein ; the wing is 5 mm. long, which is 2.3 times as 

 long as the fore metatarsus. Wisconsin (W. M. Wheeler, 

 col.). 



Another female specimen from this locality differs in having 

 3 more or less confluent spots on each tergite, forming a wide 

 basal fascia with tridentate margin. 



Var. chloratica n. var. Wheeler ]\IS. Subcostal crossvein 

 is situated proximad of the middle of the cell R^ ; subcosta ends 

 in the costa beyond the middle of the cell R^ which is not twice 

 as long as wide. Milwaukee Co., Wisconsin (W. M. Wheeler, 

 col). 



