MAY PLIES AND MIDGES OF NEW YORK 147 



has the same habits, resting at the surface of the water with 

 the slender funnel-shaped prothoracic air tubes penetrating the 

 surface film and quickly descends when disturbed. The anal 

 paddles resemble those of O u 1 e x , but are more hairy." 



This species was also bred in a laboratory jar at Ithaca N. Y., 

 the larva having been collected from one of the ponds in the 

 vicinity. The empty larval iskin of the single specimen was lost. 



Pupa. Fuscous green. Respiratory trumpet (pl-19, fig.7) 

 somewhat elongate, its free end open, the surface rugose. There 

 are no blunt setae near the base. Body nearly devoid of setae, 

 excepting the margin of the last two segments, which have four 

 or five lateral filaments each. The caudal fin consists of two 

 pointed lobes with ciliate margins (pi .19, fig.6). 



Imago. Male and female. Yellowish brown, the scutellum, 

 abdomen, halteres and legs pale yellowish, the abdomen chang- 

 ing into yellowish brown toward the apex and with a similarly 

 colored band on the preceding segments except the first, a brown- 

 ish band before apex of each femur and near the base of each 

 femur and near base of each tibia; antennal plumosity of male 

 brown mixed with whitish and changing into white at the apex; 

 ruesonotum opaque, grayish pruinose, the three vittae indistinct, 

 yellowish brown; abdominal segments 2 to 6 bearing near the 

 base a dorsal cluster of rather long brown hairs; front tibiae 

 only pubescent, their tarsi bearing a few rather long hairs, middle 

 and hind tibiae densely covered with such hairs; wings densely 

 haired, hyaline, a median band and the apical third brownish and 

 marked with several hyaline spots; median band very irregular, 

 greatly contracted at the middle and expanded at each end, the 

 median crossvein about at its middle and clouded with darker 

 brown, the hyaline spots principally situated near the hind mar- 

 gin of the wing; brown at apex of wing contains about eight 

 hyaline spots and dots; cubitus forks slightly before the cross- 

 vein ; length 3 to 4 mm. Washington D. C. ; New York ; Massa- 

 chusetts; South Dakota; Pennsylvania, and Michigan. 



In an immature specimen the parts of the body described 

 above as yellowish are more or less green. Wing venation as 

 figured on pi. 27, fig.9. The fore metatarsus is but little over one- 

 half as long as its tibia. 



11. Ablabesmyia johnsoni Coquillett 

 1901 T a n y p u s Coq. Proc. U. S. Nat Mus. 23 :609 



Male. Yellow, the scutellum, halteres, and tarsi white; apical 

 joint of the latter, a band before apex of each femur and near 

 base of each tibia brown, abdomen whitish, each segment with 



