282 NEW YORK STATE MUSEUM 



Genus camptocladius 



Van der Wtilp, 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 



h Palpi 4 jointed Trichocladius Kieffer 



hh Palpi 3 jointed Diplocladius Kieffer, '08 



aa Eyes bare 



h Pulvilli large, empodium long and filiform Psectrocladius Kieffer 



hh Pulvilli wanting ' 

 c Empodium filiform 



d Palpi 4 jointed Dactylocladius Kieffer 



dd Palpi 3 jointed Trissocladius Kieffer, '08 



cc Empodimn not distinct Orthocladius 



Trichocladius lacteipennis n. sp. 

 Female. Head 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. W^ings hyaline, ting^^d with milky white, 

 broad, anal angle prominent, veins pale, anterior veins as far as the 

 cross vein more yellowish; costa extends beyond R4+5 one third of 

 the way to the tip of the media ; cubitus forks distad of the cross 

 vein. Halteres yellow. Length 4 mm. Pennsylvania. 



