Long-nosed Pond Fly

For terms see Morphology of Diptera.

Size Length around 11 mm. Head There is a central black stripe on the yellow to orange face. The gena are shining black and the distance from the eye to the bottom of the face is more than 3/4th the height of the eye. The antennae are brownish red with an elongated flagellum and a thinly plumose arista. The frons is black above the antennae and above that the black vertex has yellow pile. The eyes are bare, with the male [holoptic]and the female dichoptic. The occiput pile and pollen both yellow. Thorax The dorsum of thorax is shining black and, thinly pilose. On the inner side of each postpronotoum there is a spot of silvery pollen covered with yellow pile. The scutellum is black and covered with erect yellow pile. Pleurae black with areas of pale yellow pile.

Wings Wings are reddish brownish in front. The base of vein (R2+3) and the middle cross-veins, (r-m and bm-cu) are narrowly clouded with brown. Vein (R4+5) is not curved into the first posterior cell.

Legs The femora are black with yellow to orange apical tips. The tibia are yellow. Basitrarsi yellow, with the remaining tarsomeres black. Coxae are black. Abdomen The abdomen has a shining black ground color with yellow pile the longest on the anterior sides. Segments 2 and 3 in the male and 2, 3 and 4 in the female have yellow finger shaped bands. …