present; gena slightly more than 0.33 
height of eye; 3d antennal segment 
small, round. 
Mesonotum. Acr irregular, in 2-4 rows. 
Wing. Length in male 2 mm, 2d costal 
section 2. 5-2. 9 times length of 4th. 
Color. Frons uniformly black or 
slightly paler, blackish brown, above; 
orbit blackish gray; gena, face, 
antenna black; legs black but femora 
with yellowish knees; mesonotum black, 
with weak subshine and only faintly 
gray dusted, side of thorax black; 
squama yellowish, margin and fringe 
ochreous brown. 
Male genitalia. Aedeagus (figs. 1275, 
1276) with supporting sclerites of 
dorsal lobe slender, relatively long, 
unpigmented in upper half, only narrow- 
ly diverging; end of ejaculatory duct 
curving dorsally; sperm pump minute 
(fig. 1277). 
Host /early stages. Unknown. 
Holotype m. , North Carolina, Macon 
Co., Highlands, 3,800 ft, 8.V.57; 
paratype m. , same data; (both J. R. 
Vockeroth). Holotype in CNC, paratype 
in KAS . 
Remarks. This is another species in 
the C. luzulae superspecies; 
distinctive characters are the dis- 
tinctly black mesonotum and in the 
male genitalia the form of the 
supporting sclerites of the dorsal 
lobe. 
Chroma t omy ia norwegica (Ryd£n) (new to 
U.S.A.) 
(Figs. 1262, 1263) 
Phytomyza cirsiophaga Hendel var. 
norwegica Ryddn, 1957: 1, from 
Lapland in Tromsoe Museum, Norway. 
Chromatomyia norwegica , Griffiths, 
1980: 18. 
The distribution of this species has 
been known as holarctic, with records 
in Europe from Norway, Sweden, 
Finland, and Germany (Erzgebirge), and 
from North America in Alberta and 
British Columbia. A single male has 
been seen from Colorado, Clear Creek 
County, Mt. Evans, Doolittle Ranch, 
23. VII. 61 (J. G. Chillcott ) , in CNC. 
Although Ryddn associated the species 
with a feeder on Cirsium , it was first 
recognized as a grass feeder by 
Spencer (1976a: 447), who included it 
with Phytomyza milii Kaltenbach. 
Griffiths (1980) accepted C, norwegica 
as one of nine species forming part of 
the C^. milii superspecies. The only 
other species in this group known in 
the United States is C . pseudomilii 
(p. 206). A distinctive character of 
the genitalia of this superspecies is 
the presence of ’’wedge-shaped" 
sclerites between the base of the 
dorsal lobe (supporting sclerites) and 
the sclerites of the ventral lobe 
(fig. 1262). 
A distinctive character of C!. norwegica 
is the partially yellow frons, which 
is, however, black on the lower half. 
The specimen from Colorado is 
generally darker than others recorded 
by Griffiths, but the genitalia agree 
exactly with the illustrations given 
by Griffiths of a male from British 
Columbia and that are repeated here 
(figs. 1262, 1263). 
Chromatomyia poae Griffiths (new to 
U.S.A. ) 
(Figs. 1279, 1280) 
Chromatomyia poae Griffiths, 1980: 
46. Holotype male from Alberta in 
CNC. 
Griffiths (1980: 40) treated the 
well-known species C . fuscula as a 
superspecies, recognizing four 
distinct species, fuscula 
(holarctic), CJ . puccinelliae Spencer 
(1969a: 269, Greenland), C. alopecuri 
Griffiths (1980: 47, Alberta), and £. 
poae Griffiths (1980: 46, Alberta). 
Differences between these species are 
slight even in the male genitalia. 
However, a population in Colorado on 
329 
