426 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 58. 



Rs longer; vein R2 not oblique and cell Ri not conspicuously widened at 

 its outer end ; veins seamed with brown 24, 



24. Larger species, wing of the male over 9 mm.; male with the pleural ap- 



pendage of the hypopygium pectinate 25. 



Smaller species, wing of the male under 8.5 mm. ; male with the pleural 



appendage of the hypopygium not pectinate, rather sharply pointed 



L. terebrans (p. 428). 



25. Larger species, wing of the male about 13 mm. ; costal and subcostal cells 



of the wings rich yellow ; stigma dark brown ; bases of femora bright 



yellow ; anterior apical appendage of male hypopygium bifurcate 



L. rvfihasis (p. 427). 



Smaller, wing of the male about 11.5 mm. ; wings uniform light yellowish 



gray ; stigma rather indistinct, grayish ; bases of femora brownish yellow ; 



anterior apical appendage of male hypopygium simple. (Regional) 



L. simplex Alexander. 



26. Cell R2 of the winds broadly sessile L. emmelina (p. 426). 



Cell R2 of the wings petiolate 27. 



27. Rs short, about equal to vein R2 L. lenta (p. 427). 



Rs long, equal to about twice the length of vein R2 L. quadrata (p. 427). 



The immature stages of most of the local species are spent in 

 moist earth. A very few species live beneath the bark of trees. 



LIMNOPHILA ADUSTA Osten Sacken. 



Dead Run, Virginia, June 29, 1915, R. C. Shannon; October 28, 

 1919, McAtee; Veitch, Virginia, June 9, 1912, F. Knab. 



LIMNOPHILA ALLENI Johnson. 



Great Falls, Virginia, May 23, 1918; Mount Vernon, Virginia, 

 July 13, 1917, McAtee. 



• LIMNOPHILA APRILINA Osten Sacken. 



Great Falls, Virginia, August 11, 1915; Virginia near Plummers 

 Island, September 5, 1915, Dead Run, Virginia, May 10, 1916, 

 McAtee; Glencarlyn, Virginia, June 4, 11, 1911, F. Knab. 



* LIMNOPHILA AREOLATA Osten Saeken. 



Several records from Maj^ 2 to 24. V. P. I. 



* LIMNOPHILA BREVIFURCA Osten Sacken. 



Great Falls, Virginia, April 20, 1913 ; C. P. Heinrich, April 20, 

 1916, McAtee. 



* LIMNOPHILA EMMELINA Alexander. 



Great Falls, Virginia, April 20, 1913, F. Knab; Maryland near 

 Plummers Island, May 2, 1915, R. C. Shannon ; May 10, 1916, McAtee. 



• LIMNOPHILA FUSCOVARIA Osten Sacken. 



Frequent along streams; extreme dates of collection, May 16 to 

 September 2 ; comes to light. V. P. I. 



