NO. 2344. SUPERFAMILY TIPULOIDEA— ALEXANDER AND McATEE. 413 



4. Femora with three brown bands L. immatura (p. 413). 



Femora with two brown bands L. cinctipes (p. 413). 



5. Wings with conspicuous browa clouds and seams L. indigena (p. 413). 



Wings almost clear, only three or four tiny brown dots along the costal mar- 

 gin L. iristiyma (p. 413). 



The immature stages are fimgicolous {L. triocellata), mud in- 

 habitants {L. fallax, and others) , live in decaying vegetable matter 

 (Z. indigena) or in decaying wood. 



LIMNOBIA CINCTIPES Say. 



Great Falls, Virginia, April 20, 1916, October 3, 1915, McAtee: 

 Piummers Island, August 13, 1912, October 10, 1904, E. A. Schwarz 

 and H. S. Barber ; Washington, District of Columbia, Osten Sacken. 



LIMNOBIA FALLAX Johnson. 



Glencarlyn, Virginia, July 11, Nathan Banks. 



* LIMNOBIA IMMATURA Osten Sacken. 



Great Falls, Virginia, October 4, 1916, McAtee; Piummers Island, 

 May 14, 1914, at light, K. C. Shannon ; June 30, 1912, McAtee ; Mary- 

 land near Piummers Island, August 5, 1914, E. C. Shannon ; May- 

 wood, Virginia, October 22, 1915, McAtee. 



* LIMNOBIA INDIGENA Osten Sacken. 



Falls Church, Virginia, May 24, Nathan Banks; June 7, 1914, E. 

 C. Shannon; July 7, 1912, Nathan Banks; Spring Hill, Virginia, 

 September 21, 1911, F. Knab; Forest Glen, Maryland, May 30, 1914, 

 McAtee. 



* LIMNOBIA TRIOCELLATA Osten Sacken. 



Abundant; extreme dates of collection. May 28 and October 29; 

 reared from mushrooms, among Vshich are Clytocijhe species and 

 Boletus felleus. P. I. 



LIMNOBIA TRISTIGMA Osten Sacken. 



Dead Eun, Virginia, June 29, 1915, E. C. Shannon. 



Tribe ANTOCHINI. 



KEY TO GENERA. 



1. Rostrum elongated, at least as long as the head 2. 



Rostrum shorter tlian the head 4. 



2. Rostrum nbout n.-^ lon-j; ;!s the he;ul or a very little longer 



Rhamphidia ( p. 414 ) . 

 Rostrum about as long as the body 3. 



3. Rs with two branches reaching the Aving margin EJcphantomyia (p. 414). 



Rs reaching the wing msirgin unbrriuched Toxorhina (p. 414). 



4. Crossvein r lacking Marlja (p. 415). 



Crossvein r present ^ 



