Napomyza manni Spencer, new species 
(Figs. 1067, 1068) 
Head. Frons 1.5 times width of eye, 
broadly projecting above eye in pro- 
file; 2 ors, 2 ori, orbital setulae in 
single row near eye margin and some 
additional hairs at broadest point of 
orbit near lower ori; gena extended at 
rear, just less than 0.5 height of 
eye; 3d antennal segment flat above, 
almost angular at upper corner. 
Mesonotum. 3+1 dc , acr sparse, in 2 
rows . 
Wing. Length in male 2.75 mm, 2d 
costal section only slightly longer 
than 4th, in ratio 7:6. 
Color. As in N. grandella . 
Male genitalia. Aedeagus (fig. 1067) 
with distiphallus elongate, adjoined 
by narrow process enlarged basally; 
sperm pump (fig. 1068) with large 
blade and base strongly sclerotized at 
each end. 
Host/early stages. Unknown. 
Holotype m. , Colorado, Clear Creek 
Co., Loveland Pass, 7. VII. 61 (C. H. 
Mann), in CNC. 
Remarks. The elongate distiphallus 
suggests close relationship with N. 
plume a (fig. 1065), but the two species 
are readily distinguishable by the 
different form of the third antennal 
segment . 
Napomyza marginal is (Frost), new 
combination 
(Figs. 1076, 1077). 
Phytomyza marginalis Frost, 1927: 
219. Holotype female from New York 
in USNM. 
Examination of the female holotype and 
a male paratype with the same data 
shows that this species is close to, 
if not identical with, Napomyza 
nigritula ( Zetterstedt ) from Sweden. 
A more familiar name is N. cineracea 
(Hendel), which was synonymized with 
N. nigritula by Spencer (1976a: 341). 
The species is known under this name 
from much of Europe and was also 
recorded in Canada (Spencer, 1969a: 
235, as Phytomyza ) . 
Although Frost described the frons as 
yellow, it is normally distinctly 
darker, at least ochreous yellow and 
ranging from pale to darker brown. 
Frick (1959: 431) referred to the 
frons as "dark.” 
It is not proposed at this stage 
formally to synonymize N. marginalis 
with N. nigritula , as it is possible 
that a complex of two or more species 
is involved. The only apparent 
difference is in the form of the 
distiphallus, which is virtually 
straight in N. marginalis (figs. 1076, 
1077) but distinctly curving in the 
population from Alberta (see Spencer, 
1969a: fig. 415). An intermediate 
form has been seen from England, Wilts- 
shire, Gastard (KAS), in BMNH. In one 
male of Hendel 1 s type series from 
Hungary ( M Aust." in Hendel' s sense) 
(genitalia slide 5204, in NMW), the 
paramesophalli are shorter and more 
rounded, although the distiphallus 
itself is straight. This specimen is 
not designated as lectotype, pending 
examination of all males in Hendel' s 
type series of nine specimens. 
The species is widespread in 
Scandinavia, central Europe, and 
Britain and has been recorded from 
Iceland (Griffiths, 1968). Specimens 
have been reared from Ranunculus stems 
in Europe, Ontario, and Alberta. No 
biological differences between the 
populations have been detected. 
Further clarification of this complex 
will require more detailed study than 
is possible at present, and an 
additional species that will require 
examination is P. nigrigenis Hering, 
1937, from Germany. 
New records. 
New York, Tompkins Co., Slaterville 
Wild Flower Preserve, 1 m. , 27.V.38 
(PSU). 
308 
