AMERICAN DIPTERA. 333 



piceous, clothed with short black hairs; wings dark brown, slightly tawuy along 

 part of the fore border from the base ; wing-ribs and veins piceous. 2.5 mm. 



St. Martin's Falls, Albany River, Hudson's Bay. 



HOL.OCL.ERA Schiner. 



Small, nearly bare species of black coloration. The antennae 

 elongate, with the first joint minute, the third lengthened, lanceo- 

 late or attenuate, with an elongate style. Proboscis slender, hori- 

 zontal. Eyes of the male contiguous. Thorax greatly hunchbacked. 

 Male genitalia prominent, in our species pedunculate and flexed to 

 the right. Legs more or less ciliated with fine hairs ; the hind tibiae 

 and metatarsi thickened. Wings short and broad, with a simple 

 third vein ; discal cell emitting three veins ; anal cell rounded, the 

 anal vein not continued ; anal angle rectangular, very prominent. 



A. genus previously unrecognized on this continent. 



Body opaque gray pruinose ravida Coquillett. 



Body not conspicuously gray pollinosi 2. 



2. Thorax biliueate ; halteres whitish. biliiieata sp. nov. 



Thorax evenly dusted ; halteres black, 3. 



3. Under side of front femora devoid of cilia ; wings infumated ; stigma indistinct. 



syc'ophautor sp. nov. 

 Under side of all the femora ciliate; wings clear hyaline; stigma distinct. 



atrata Coquillett. 



Holocera ravida Coquillett. 

 Microphorus ravidus Coquillett, Proc. Nat. Mus., 1895, p. 409. 



Black, only the halteres whitish. Eyes contiguous, third antennal joint 

 elongate, conical, the apical style slightly longer than the third joint; probosis 

 nearly perpendicular, from two-thirds as long to as long as the height of the head. 

 Thorax, pleurae, scutellum, and abdomen opaque gray polliuose, the bristles black, 

 scutellum bearing four bristles; hypopygium rather large, bent around against 

 the right side of the abdomen. Wings grayish hyaline, slightly smoky along 

 the veins, stigma and veins brown, no vein issues from the anal cell ; this cell is 

 ■ nearly as long as the second basal, the vein at its apex arcuate and not parallel 

 with the hind margin of the wing. 2 mm. 



The female diflfers from this in having the eyes broadly separated 

 and the abdomen very blunt at the apex. 

 Southern California. 



Holoclera afrata Coquillett. 

 Microphorus ntratus, Proc. Wash. Acad. Sci., 1901, p. 412. 



Black, including the hairs ; eyes of male contiguous, the third joint of antenuse 

 orbicular on its basal half, the remainder narrowed into a styliform process, style 

 one and one-half times as long as the third antennal joint, proboscis less than hall' 



TRANS. AM. ENT. SOC, XXVIII. SEPTEMBER, 1902. 



