Pennsylvania, Luzerne Co., Hazelton, 1 
m. , 10.V.10 (Dr. Dietz coll., PSU) . 
Napomyza nugax Spencer 
(Figs. 1071-1073) 
Napomyza nugax Spencer, 1969a: 215. 
Holotype male from Ontario in CNC. 
This species is widespread in Canada, 
and two specimens can now be recorded 
from Colorado and North Carolina. The 
aedeagus of the male from North 
Carolina agrees exactly with that of 
the holotype (fig. 1071), although the 
specimen itself is unusually large, 
with a wing length of 3.3 mm. 
The status of a male from California, 
Alpine County, Hope Valley, 8. VIII. 48, 
Lot 91 - 24 (KEF), in CAS, has been in 
doubt. At the time of the description 
of N. nugax it was labeled as a 
paratype but was not included as such 
in the description. This may have 
been inadvertent but was possibly 
deliberate, as the aedeagus (fig. 
1072), though resembling that of N. 
nugax , appears to be not identical 
with it. It seems undesirable to 
treat this single specimen as 
representing a distinct species, and 
it is tentatively referred to N. nugax 
pending further clarification when 
additional material becomes 
available. 
New records. 
Colorado, Boulder Co., Nederland, 
8,500 ft, 1 m., 18. VI. 61 (B. H. 
Poole) , in CNC. 
North Carolina, Yancey Co., Mt. 
Mitchell, 6,500-6,684 ft, 1 m. , 
5. VI. 62 (J. R. Vockeroth), in CNC. 
Napomyza suda Spencer (new to U.S.A. ) 
Napomyza suda Spencer, 1969a: 217. 
Holotype male from Ontario in CNC. 
This is an exceptionally large, distinc- 
tive species, with a wing length of 
4-5 mm. The notopleuron, the upper 
half of the mesopleuron, and the 
squamal margin and fringe are yellow. 
It is distinguishable from N. pallens 
by the scutellum being entirely black. 
New records. 
Michigan, Allegan and Midland Cos. 
South Dakota, Brookings Co., 
Brookings, 1 f., 17.V.12 (H. 
Severing), in PSU. 
GENUS PHYTOMYZA FALLEN 
Sixteen new species are described, 1 
new synonym is established, and 11 
species are recorded as new to the 
United States and 1 as new to North 
America. A lectotype is designated of 
P. f lavinervis , and two species are 
diagnosed as probably new but are not 
formally described in the absence of 
males. The first male is recorded of 
P. auricornis , and illustrations are 
given of the genitalia. P. nigri - 
pennis Falldn, recorded by Frick 
(1959), is deleted from the United 
States list, representing a misidenti- 
fication of I>. saskatoonensis Spencer. 
Phytomyza aldrichi Spencer, new species 
(Figs. 1100, 1101) 
Head. Frons twice width of eye, not 
projecting above eye in profile; 1 
strong ors, directed slightly outward, 
2 equal, reclinate ori, orbital setulae 
sparse; gena about 0.33 height of eye; 
3d antennal segment slightly longer 
than broad. 
Mesonotum. 3+1 strong dc, acr in 4 
rows . 
Wing. Length in male 2 mm, 2d costal 
section 2.2 times length of 4th. 
Color. Frons yellow, orbit slightly 
paler; vti on yellow, hindmargin of 
eye black, vte at border of black and 
yellow; gena and face yellow; palpus, 
2d and 3d antennal segments black, 1st 
yellow; mesonotum matt grayish black, 
scutellum largely similar but faintly 
yellow between basal scutellars; legs 
largely black but coxae on foreleg and 
midleg yellow, all knees distinctly 
yellow; squama yellowish, margin and 
fringe dark, brownish. 
309 
