121 Journal New York Entomological Society. [Voi. xxiv, 
Habitat. — Eastern United States. 
Holotype, J*, Plummers Island, Maryland; June 3, 1914; R- C. 
Shannon. 
Paratype, J*, Beltsville, Maryland; June 9, 1915; W. L. McAtee. 
The type is in the collection of the United States National 
Museum. 
This interesting fly differs from L. niimda Ostcn Sacken (see plate 
VIII, fig. 4), which it superficially resembles, in the hyaline wings, 
the legs are not conspicuously hairy, the increased amount of black 
on the fore and middle femora and the prominent genitalia of the 
male. 
Limnophila terebrans new species. 
Black, the thorax with a slight gray bloom ; wings slightly suffused with 
brown : R2+3 very short, less than the deflection of Ri+s- 
Male. — Length about 7.5 mm. ; wing, 7.7 mm. 
Female. — Length, 8 mm.; wing, 8.1 mm. 
Rostrum very short, dark brown, the palpi similar in color, very short. 
Antennae rather short, the first segment elongated, dark brown, remaining 
segments of the organ submoniliform, the apical segments of the flagellum 
not conspicuously elongated, flagellum light brown, the segments with a dense 
pale pubescence. Head broad, the vertex broad and bearing a very low, 
obtuse tubercle. Head dark gray. 
Thorax black with a yellowish gray bloom over the entire surface, the 
usual mesonotal interspaces with prominent long yellow hairs ; postnotum 
more reddish. Halteres short, stout, dull yellow. Legs with the coxae dark 
brown; trochanters brownish yellow; legs of the male longer and more 
slender than those of the female which are club-shaped and more conspicu- 
ously hairy ; femora yellow tipped with dark brown, the fore femora with 
the apical half brown, the hind pair with only the apex darkened ; tibis 
brown ; tarsi dark brown. Wings with a slight brownish tinge, the stigma 
dark brown, cross veins and deflections of veins seamed with brown. Vena- 
tion as in plate i, fig. 5: Rs elongate, slightly arcuated at the origin; /?2+s 
short, a little less than the deflection of R^+^■, petiole of cell Mj longer than 
this cell. The right wing of the allotype is abnormal, the cell R. nearly 
sessile; cell ist M., very small to obliterated, the petiole of cell Mj much 
longer than this cell. 
Abdomen dark brown ; valves of the ovipositor very long and slender, 
the tergal valves slightly upturned at the apex. 
Habitat. — Eastern United States. 
Holotype, (^, Cabin John, Maryland; May 5, 1899. 
Allotype, 5. topotypic, in coitu with the type. 
