localities at high elevations in 
Colorado . 
With the frons yellow, two equal ors, 
and the second costal section short, 
P_, suhalpina resembles a number of 
other species, particularly P_. manni, 
n. sp., but the male genitalia (figs. 
1158, 1159) are distinctive. It is 
interesting to note that the female 
has the ovipositor greatly elongated, 
a character found in P_. varipes 
Macquart, which feeds in seed heads of 
Rhinanthus spp. and which is known 
from Europe, including Iceland, and 
Nova Scotia (see Spencer, 1969a: 
282) . It can be assumed with certainty 
that P. subalpina feeds in the same 
way, but there is no indication from 
present data as to the host. 
New records. 
Colorado, Clear Creek Co., Mt. Evans, 
Echo Lake, 10,600 ft, 1 m. , 
13. VII. 61, 2 f., 25. VII and 
24. VIII. 61; Mt. Evans, Timberline, 
11,700 ft, 1 m. , 29. VII. 61; Summit 
Flats, 12,800 ft, 1 m. , 24. VII. 61; 
(all C. H. Mann); Loveland Pass, 
12,000 ft, Summit, 1 f., 7. VIII. 61 
(B. H. Poole); Boulder Co., Corona 
Pass, 10,600 ft, marshy meadow at 
Tiraberline, 1 m. , 6. VII. 61 (J. G. 
Chillcott); Jefferson Co., Mt. 
Vernon, near Golden, 7,200 ft, 1 m. , 
31. VII. 61 (C. H. Mann); Lake Co., 
Independence Pass, 12,100 ft, 
tundra, 1 f., 31. VII. 61 (J. G. 
Chillcott), 1 f., 7. VIII. 61 (C. H. 
Mann); all in CNC. 
Phytomyza tenella Meigen (new to 
U.S.A.) 
(Figs. 1156, 1157) 
Phytomyza tenella Meigen, 1830: 195. 
Ho lo type male from Germany in NMW. 
A single male of this species can now 
be recorded from Colorado, Clear Creek 
County, Mt. Evans, Echo Lake, 10,600 
feet, 24. VIII. 61 (C. H. Mann), in 
CNC. I?, tenella is known from 
northern Canada (misidentif ied as 
af finis Fallen, Spencer, 1969a: 225) 
and is widespread in Europe, including 
Ireland (Griffiths, 1964: 411). 
This species belongs to a closely 
related group of feeders in seed heads 
and stems of several genera of 
Scrophulariaceae. Apart from P. 
tenella ( Pedicularis , Euphrasia ) , 
species known in Canada include P. . 
pedicularicaulis Spencer and P. 
pedicularidis Spencer ( Pedicularis ) 
and in Europe P . rostrata Hering 
( Euphrasia , Melampyrum , Odontites , and 
Rhinanthus ) (see Spencer, 1969a, 
1976a). A distinctive character of 
the aedeagus (fig. 1156) is the large 
flaplike ventral sclerite at the end 
of the right basal sclerite. P. 
tenella is obviously closely related 
to P. orindensis and P . subtenella , 
but in these two species this ventral 
lobe is lacking. 
Phytomyza wahlgreni Ryddn (new to 
North America) 
(Figs. 1199, 1200) 
Phytomyza wahlgreni Ryd£n, 1944: 49. 
Ho lo type female from N. Sweden in 
ZIL. 
Phytomyza taraxacocecis Hering, 1949: 
29. Holotype male from Germany in 
ZMHU (synonymy established by 
Spencer, 1976a: 527). 
This species is widespread in Europe, 
the larva feeding in the midrib of 
Taraxacum spp. Five specimens can now 
be recorded from Colorado. The 
aedeagus in side view (fig. 1199) 
agrees exactly with illustrations 
given by Griffiths (1964: fig. 18) and 
Spencer (1976a: fig. 921). The 
divided distiphallus of the Colorado 
specimens is as shown by Spencer 
(1976a: fig. 922) (male from Sweden), 
rather than as shown by Griffiths 
(1964: fig. 18b). Additional study of 
European material will be necessary to 
establish whether this difference is 
of specific significance. 
£. wahlgreni belongs to the difficult 
JP. " robustella " group, in which a 
number of species, virtually insepa- 
rable on external characters, are host 
specific on differing genera of 
Asteraceae and have distinctive 
differences in the male genitalia. It 
322 
