W. G. DIETZ 
Limnophila brevifurca Osten-Saoken, Prnr. Afad. Nat. Sci. Pliila., 1S50, 
[). 237; Mnn. X. A. Dipt., iv, j). 221. 
Rare. May 15, 1911, the only record. 
Limnophila fratria O.sten-Sacken, Mon. N. A. Dipt., iv, p. 220. 
Hare. June 4, 1917; a sinole male. 
Limnophila subcostata Alexaiulor, Can. Ent., xuii, jn 283, 101 1, f /'//?// f- 
(lorc(t). 
Rare. May 27, 1912; a sinole male. 
Liunnophila toxoneura O.sten-Sacken, Proc. Acad. Nat. Sci. Phila., ISoO, 
]). 230: Mon. X. A. Dipt., iv, p. 213. 
Tfot rare. June and July. 
Liranophila noveboracensis Alexander, Iksyche, xvm, p. 190, pi. 10, fis. 3, 
1011. This species should hax'e been recorded under the suh^eniis 
lininophila. 
Rare. July 22, 1915; July 5, 1917. 
Limnophila quadrata Osten-Sacken, Proe. Acad. Xat. Sci. I’hil.a., 18.59^ 
p. 241; Mon. X. A. Dipt., iv, p. 2;10, pi. ii, h<>;. 9. 
(’ommon. Occurs the whole season; most frequently in Ma}" 
and June. 
Limnophila lenta O.sten-Sacken, Proc. ,\cail. Xat. Sci. Phila., ISoO, p. 211; 
Mon. X. Dipt., IV, p. 231. 
\’ei'y common. June to August, in swampy situations. 
Limnophila congenita spec. nov. 
.Agrees with L. lenta in siz(' and 
follows: 
lenta. 
Antennae light yellowish hrown. 
'riie ninth tergite scarcidy pro- 
jecting in the middle. 
Pleurites elongate, straight, long- 
er, divei’ging. 
Pcuiis guard hilohcd ;i1 base. 
venation. O'Ikw are distinguislu'd as 
cn/a/etiita 
.Vntennac' brown. 
Ninth tergite cmarginatc' on each 
siile, a(‘ut('ly proj(>cting in the mid- 
dle. 
Pleurites comp.act, held iulrail 
apically. 
Ik'uis guard not bilobed. 
Ifolotype . — cf ; Hazleton, I’ennsylvania. July 27, 191.). 
Alldtiipe . — 9; topotypic, .1 line 17, 1911. 
Pdi'dtiipes, I opotyjuc, (‘io;hl males, .1 uiu' 19, 1 1) 1 2 ; oiu', .luiu' 
1912; one, June Id, 1919; two, .lime 22, 1919, and mu', .1 mu' 21, 
1920. 
TRANS. AM. KNT. SOC., XI.VIl. 
