02 
STUDIES IN AMERICAN EPHYDRIDAE (dIPTERA) 
N. difflcUis Wiedemann 
1830. Ausser. Zwiefl. Ins., ii, 591, (South America). 
This may prove to be synonymous with erythrocera. The 
entire yellow color, with two series of abdominal spots, suggests 
that species. 
N. exotica Wiedemann 
1830. Ausser. Zwiefl. Ins., ii, 590, (Montevideo). 
The yellow color, especially of the antennae and palpi, which 
are assumed to be this color, and the four series of abdominal 
spots, suggests punctifera. 
N. producta Walker 
1849. List Br. Mus., iv, 1099, (Hudson Bay). 
This species, according to Mr. E. E. Austen, is the same as 
Ephydra octonotata Walker, which belongs to the genus Parydra, 
judging from Austen’s notes. 
N. pulchrifrons Williston 
1897. Ivans. Univ. Quart., vi, 5, (Brazil). 
Synonym of frontalis. 
N. quadrisetosa Thomson 
1868. Eugen. Resa, Dipt., 594, (California). 
This may prove to be the same as my occidentalis. The de- 
scription will cover several of the forms I have from the west 
coast region. 
N. repleta Walker 
1849. List of Br. Mus., iv, 1099, (Martin’s Falls). 
Mr. Austen reports that this species belongs to the Helomyzidae. 
N. solita Walker 
1856. Dipt. Saund., i, 406, (Llnited States). 
Evidently a Notiphilid sens, strict., belonging to the quad- 
riseriated abdomen group between riparia and hella. Mr. Aus- 
ten, comparing the type with some erythrocera I sent him, says 
it is similar. Erythrocera, however, is rarely found in the United 
States. From Austen’s suggestions I am inclined to consider it 
conspecific with our riparia. 
N. striata Williston 
1897. Ivans. L^niv. Quart., vi, 5, (Brazil). 
See note on the synonymy of virgata. 
