HOUGH : PIPUNCULIDAE OF THE UNITED STATES. 
79 
Opaque, black; halteres and antennae black; third antennal joint 
short and obtuse. Dorsum of thorax opaque with brownish gray 
pollen. Base of each abdominal segment black and opaque; the 
remainder of the first segment densely white pollinose; remainder 
of the other segments with grayish pollen which becomes whiter, 
thinner, and less opaque toward the sides. Sixth segment of mod¬ 
erate size, black. Legs black; apices of femora and bases of tibiae 
yellow or reddish yellow. Wings gray, toward base more purely 
hyaline; stigma brown; veins black; small cross vein near the 
junction of the basal and middle thirds of the discal cell; third 
segment of costa shorter than the fourth. 
JP. subopacus Lw. In the Loew collection a single female. 
Brownish black. Halteres yellow. Antennae black; third joint 
prolonged into a long white process. Dorsum of thorax lightly 
sprinkled with brownish gray pollen. Abdomen brown black 
almost shining; first segment except the cephalic margin, other 
segments toward the sides and caudolateral angles whitish polli¬ 
nose. Sixth segment of male small and without cleft. Femora 
black, thickly gray pollinose, except mesal surface of posterior 
femora, which is shining black. Apex of femur sometimes yellow¬ 
ish. Tibiae vary from yellowish with a black ring to black (some¬ 
what gray pollinose) with yellowish base. The tarsi are black or 
brown with more or less yellow on the first one or two joints. 
Wings grayish hyaline; stigma brown; veins black; small cross 
vein at about the junction of the basal and middle thirds of the 
discal cell; third segment of costa about equal to the fourth. 
JP. nigripes Lw. In the Loew collection there is a single male 
without a head. Brownish black. Antennae black ; third joint 
short acuminate. Dorsum of thorax and scutellum brown polli¬ 
nose, subopaque. Abdomen wholly opaque. First segment, except 
at base, white pollinose. Second, third, and fourth segments vel¬ 
vety black, each with a caudal, transverse, dark gray pollinose 
fascia. Fifth segment brown pollinose, subshining, whitish polli¬ 
nose on the sides. Sixth segment black, rather shiny, thinly gray 
pollinose; its cleft considerably to the right of the median line. 
Legs black. Femora grayish pollinose to a varying extent except 
the mesal surface of the posterior femora, which is shining black; 
the extreme tips of the femora are yellow. Flexor surface of 
anterior and middle femora with rows of tiny black spines. Tibiae 
yellow at base to a varying extent. First one or two joints of the 
