Host/Early Stages. Unknown. 
Distribution. California (see part 2); new 
records: Colorado, North Carolina; widespread in 
Canada. 
References. Spencer, 1969a: 215; 1981: 357; part 
2, p. 309. 
— 2d costal section shorter, equal to 4th 
N. montanoides Spencer 
Synopsis. Agreeing closely with N. nugax but 2d 
costal section shorter, wing length 3 mm; male 
genitalia with aedeagus (figs. 1074, 1075) having 
distiphallus not widening basally. 
Host/Early Stages. Unknown, possibly Helenium 
hoopesii (from which specimens were aspirated). 
Distribution. California. 
Reference. Spencer, 1981: 356. 
10 (1). Squamal fringe at least partially yellow 
N. marginalis (Frost) 
Synopsis. Frons ochreous yellow or more normally 
pale brown, distinctly projecting above eye, 
increasingly so toward base of antenna; orbit more 
grayish; 2 equal ors; gena 0.33 height of eye, 
parafacial prominent; all antennal segments black, 
3d elongate; mesonotum ash gray, acr in 2 rows; 
legs black, knees inconspicuously yellowish; wing 
length 2. 2-2.7 mm, 2d costal section twice length 
of 4th; squama gray, margin dark, fringe yellow- 
ish; male genitalia with aedeagus as in figures 
1076, 1077. 
Host/Early Stages. Ranunculus spp. Larva internal 
stem feeder; puparium brownish, elongate (reared 
in Ontario, no puparia preserved). 
Distribution. New York, Pennsylvania (new record); 
Canada. 
References. Frick, 1959: 431 (as Phytomyza ) ; part 
2, p. 308. 
Squamal fringe uniformly dark 11 
11 (10). Frons yellow N. blairmorensis (Sehgal) 
Synopsis. Frons yellow, broad, about 2.5 times 
width of eye, greatly projecting above eye; 2 ors, 
2 ori; gena angular at rear, about 0.5 height of 
eye; 3d antennal segment elongate, black, 2d 
brownish, 1st yellow; mesonotum ash gray, acr in 2 
rows; lejgs with forecoxa yellowish, femora black 
with alllj knees bright yellow; squama yellowish 
gray, mairgin and fringe dark; wing length from 2.3 
mm in male to 2.9 mm in female, 2d costal section 
less than 1.5 times length of 4th; male genitalia 
with aedeagus having distiphallus long, narrow, 
only slightly dilated at apex (fig. 1078). 
Host/Early Stages. Ranunculus (assumed from male 
genitalia) . 
Distribution. California; Canada. 
References. Sehgal, 1971: 358 (as Phytomyza ) ; 
Spencer, 1981: 351. 
Frons brpwnish black N. evanescens (Hendel) 
171 
