HOUGH : PIPUNCULIDAE OF THE UNITED STATES. 
85 
between third and fourth and between fourth and fifth segments 
yellow; fifth segment wholly shining black, much longer and wider 
than fourth segment, beset with a few delicate, scattered, white 
hairs; sixth segment wholly black, somewhat grayish pollinose, 
quite as large as the fifth segment, not symmetrical, being larger on 
the left side, no visible cleft or depression on its apex. Wing 
grayish hyaline; veins black, yellow towards the base; small cross 
vein at basal fourth or fifth of discal cell; fourth costal segment 
much longer than the third. One male ; Horse Neck Beach, Mass., 
Aug. 6 ...... flavomaculata sp. nov. 
12. Brown black, pollinose. Abdomen with segments one and 
five densely gray pollinose. Femora black, gray pollinose. Tibiae 
brownish yellow. Tarsi yellow except last joint black. Length 
3.5 mm. 
Eyes in contact. Face and the small, smooth frontal triangle 
silvery white. Antennae black, third joint silvery with a rather 
short sharp point. Dorsum of thorax and scutellum brown polli¬ 
nose tending to gray pollinose at the sides and near the scutellum. 
Humeri yellow. Pleurae gray pollinose. Metanotum densely gray 
pollinose. First abdominal segment black on cephalic half, densely 
gray pollinose on caudal half; segments two, three, and four are 
blackish brown, very lightly gray pollinose on the dorsum, the 
pollen becoming gradually much thicker towards and on the sides; 
fifth segment very densely gray pollinose; on it there is visible in 
some lights a suggestion of a median, cephalo-caudal brown stripe; 
sixth segment shining black, only very slightly pollinose save at 
sides and on venter, about as large as the fifth segment, very 
slightly asymmetrical; no rima or depression can be seen ; segments 
two, three, and four are of equal length, five is distinctly longer. 
Femora black, their extreme apices yellow, wholly gray pollinose 
except the mesal surface of the posterior, which is shining black. 
Tibiae appear to vary somewhat in color, according to the strength 
and incidence of the light, between a yellow and a brown; the 
anterior tibiae usually look brown except the extreme base which 
is yellow; the other tibiae look yellowish brown. Tarsi: anterior 
brown with yellow base; the others yellow with black tips. Wings 
grayish hyaline; veins black; small cross vein a little apicad the 
junction of the basal and middle thirds of the discal cell; third 
costal segment one half as long as the fourth. Halteres blackish 
brown, the middle of the peduncles yellowish albofasciata sp. nov. 
