282 NEW YORK STATE MUSEUM 
Genus CAMPTOCLADIUS 
Van der Wulp, 1874 
Camptocladius aterimus Meigen 
A male specimen of this species was bred from the earth taken 
from the base of some decaying mushrooms, October, 1907. 
Genus ORTHOCLADIUS 
Van-der Wulp, 1874 
subgenera . 
a Eyes hairy 
by Pal pr aisj Ott te disaster Trichocladius Kieffer 
bb Palpi 3 jointed Se ASRS. aa hag Para seen een eg Diplocladius Kieffer, ’08 
aa Eyes bare 
b Pulvilli large, empodium long and filiform....... Psectrocladius Kieffer 
bb Pulvilli wanting 
¢ Empodium filiform 
d.sPalpimgsjointed emus yee eee eee Dactylocladius Kieffer 
dd. JPalpie se iointed: sees we ea eae ere eee Trissocladius Kieffer, ’o8 
CE MyaTHOGHS AM TOW GHACE 5. ccscccccccorccsccccccesovccened Orthocladius 
-Trichocladius lacteipennis n. sp. 
Female. lead yellow, vertical triangle and rostrum blackish, 
eyes hairy, hairs visible with an amplification of 20 diameters, dis- 
tance between the eyes greater than twice the diameter of either 
eye when viewed directly from in front; antennae dusky yellow, 
basal joint and apex somewhat darker. Palpi not visible in either 
specimen. Collar yellow, prominent, incised at the dorso-anterior 
margin; mesonotum yellow, with three dark brown stripes, the 
laterals very slender, the median broader and widened out club- 
shaped along the anterior margin; scutellum, pleura and sternum 
yellow slightly infuscated, metanotum brownish to blackish, pleura 
with a black spot in front of the halteres. Abdomen reddish brown, 
more brownish on dorsum especially on the basal segments. Legs 
pale yellow, extreme tips of the tibiae and the tarsal joints wholly, 
more or less infuscated; foremetatarsus about .6 as long as the 
tibia; claws prominent, pulvilli conspicuous, nearly as long as the 
claws, empodium pectinate. Wings hyaline, tinged with milky white, 
broad, anal angle prominent, veins pale, anterior veins as far as the 
cross vein more yellowish; costa extends beyond R,,, one third of 
the way to the tip of the media; cubitus forks distad of the cross 
vein. Halteres yellow. Length 4mm. Pennsylvania. 
