June, I9i6.] ALEXANDER : NeW LiMNOPHILINE CRANE-FlIES. 121 



Habitat. — Eastern United States. 



Holotype, J*, Plummers Island, Maryland; June 3, 1914; R. C. 

 Shannon. 



Paratype, J*, Beltsville, Maryland; June 9, 191 5; W. L. McAtee. 



The type is in the collection of the United States National 

 Museum. 



This interesting fly differs from L. w»»rfa Osten 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 : /?2+3 very short, less than the deflection of /?4+5. 



Male. — Length about 7.5 mm. ; wing, y.y 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 ^urface, the 

 usual mesonotal interspaces with prominent long yellow hairs ; postnotum 

 more reddish. Halteres short, stout, dull yellow. Legs with the coxse 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 ; tibiae 

 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. s : Rs elongate, slightly arcuated at the origin ; i?2+3 

 short, a little less than the deflection of R^^r, ; petiole of cell M-^ longer than 

 this cell. The right wing of the allotype is abnormal, the cell /?« nearly 

 sessile; cell ist M., very small to obliterated, the petiole of cell M^ 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, J*, Cabin John, Maryland; May 5, 1899. 



Allotype, 5, topotypic, in coitu with the type. 



