148 NEW YORK STATR MUSEUM 



an ii-regalai* brown mark, coniposod jirincipally of two median 

 vittae and a posterior arcuate fascia, most distinct on the median 

 segments, on the apical ones expanded so as to cover nearly the 

 entire dorsum; hairs of antennae mixed pale yellow and brown, 

 their apices chiefly whitish, mesonotum opacpie, whitish prninose; 

 in certain lights three dark yellow vittae are visible; front tarsi 

 clothed with very short hairs, the first joint two-thirds as long 

 as the tibia ; wings whitish hyaline, almost wholly covered with 

 yellow hairs, humeral crossvein bordered with brown, a broad 

 pale brownish fascia crosses tlie wing just before the small cross- 

 vein, and a second slightly broader one at apex of Rj, cubitus fork- 

 ing a short distance before the small crossvein; length 3.5 mm. 



Female. Differs from the male as follows: Abdomen with 

 dark yellow mottlings, destitute of brown markings, hairs of 

 antennae whitish, vittae of mesonotum more distinct; length 3 

 mm. Riverton X. J. 



12. Ablabesmyia ornata Meigen 

 1838 Tanypns Meig. Syst. Beselir. 14,7:31 

 1864 T a n y p 11 s Schiner. Fauna Austr. 2 :G20 

 1877 T a n y p u s V. d Wulp. Dipt. Neoii. p.:^04 



Male. I'ale yellow; the antenna and its hairs of the male 

 ]iale brown. Thorax with three deeper yellow stripes; the two 

 lateral ones bounded anteriorly by a fine brown or black line, 

 which is continued over the pleura to the base of the wing; meta- 

 notum brownish. Abdomen Avith slightly darkened incisures; the 

 last segments of the male brownish yellow ; claspers yellowish, 

 quite stout. Legs whitish ; near the a|)ex of the femur a brownish 

 ring; the tijis of the tibiae slightly browned; fore metatarsus a 

 little shorter than the tibia; fore tarsi of the male slightly ciliate. 

 Halteres white. Wings hairy, pale yellow, with two cross bands 

 and a dark spot at the anterior margin a short distance from the 

 tip; the crossveins blackisli bord(Med ; the venation as usual. 

 Length 5.5 mm. 



Var. a. foiKilc. Differs from llie above in having the abdomen 

 with mottled dark brown iri-egular fascia on each segment. The 

 ft)re metatarsus about three-fourths as long as its tibia. 



\'(ir. 1). fciiKilc. Differs from the typical form in having three 

 distinct, opaque, ferruginous thoracic strijies, humeri white, an- 

 terior margin of the dorsum narrowly blackened; no blackish 

 j)leural spots; metanotunn and sides of scutelluni ferruginous or 

 brownish. AibdoiwMi brown, segments with paler j)osterior mar- 

 gins. The brown clouds on the wings so coale.sce that the wings 

 may 1h^ described as having two Avide, irr(\gulai' cross bands, one 

 before the middle and one between the middle and the tip; cross- 

 veins almost black. Several specimens, Tthaca. N. Y. 



