This species is a linear miner on 
Solidago , recorded hosts being jS. 
canadensis and S>. gigantea , and it has 
been known only from Alberta. 
It forms part of a closely related 
group described from Alberta, 
including also ]?. solidaginovora 
Spencer, 1969a (host Aster modestus , 
rather than Solidago sp., according to 
Griffiths, 1976b: 246); P. phalangites 
Griffiths, 1976b ( Aster spp.); P. 
solidaginophaga Sehgal, 1971 ( Solidago 
lepida ) ; ]?. asterophaga Spencer, 1969a 
( Aster conspicuus ) ; and H ciliolati 
Spencer, 1969a ( Aster ciliolatus and 
other Aster spp.). 
Griffiths (1976b) reviewed species 
mining Asteraceae and illustrated the 
genitalia of the species mentioned 
here. A male and female reared from 
Solidago f lexicaulis , 20. IX. 76, in 
Wisconsin, Dane County, Madison, are 
tentatively identified as ]?. 
astotinensis . The aedeagus (figs. 
1238, 1239) is not identical with that 
figured by Griffiths (1976b: fig. 13), 
with more spinules along the right 
basal sclerite and the angle of the 
divided distiphallus somewhat differ- 
ent. However, it seems undesirable to 
add yet another name to this complex 
without additional material, particu- 
larly from intermediate areas between 
Alberta and Wisconsin. 
Phytomyza auricomis Frost 
(Figs. 1141, 1142) 
Phytomyza auricornis Frost , 1927 : 
217. Holotype female from New York 
in USNM. 
The unique holotype has been the only 
specimen known of this distinctive 
species. A male, also from New York 
(CUI) , has been identified and the 
aedeagus is illustrated in figures 
1141, 1142. The form of the genitalia 
indicates that the species is related 
to feeders on Ranunculaceae (P. 
albomargo Hering, ]?. calthophila 
Hering, P. subrostrata Frey, and 
others) (see Spencer, 1976a: figs. 
388, 650, 692,), and it is reasonable 
to assume that the host is in this 
family. 
Phytomyza boulderella Spencer, new 
species 
(Figs. 1229, 1230) 
Head. Frons twice width of eye, not 
projecting above eye in profile; 
orbital bristles irregular in only 
available specimen, 2 ors on one side, 
upper broken, but appearing weaker 
than lower, 1 only on other side, 2 
ori on one side, 1 only on other, 
orbital setulae sparse; gena about 
O. 33 height of eye; 3d antennal 
segment rounded, rather large. 
Mesonotum. Acr sparse, in 2 rows. 
Wing. Length in male 2.1 mm, 2d 
costal section short, about 1.5 times 
length of 4th. 
Color. Frons orange yellow, entire 
orbit pale gray, hindmargin of eye 
black; 3d antennal segment black, 1st 
and 2d somewhat paler, slightly 
yellowish; mesonotum and scute Hum 
matt gray, side of thorax dark, apart 
from narrow yellow upper margin of 
mesopleuron; legs black but all knees 
bright yellow; squama, including margin 
and fringe, yellow. 
Male genitalia. Aedeagus as in 
figures 1229, 1230; sperm pump with 
large, asymmetrical blade. 
Host/early stages. Unknown. 
Holotype m. , Colorado, Boulder Co., 4 
miles NW of Boulder, Ponderosa pine, 
6,900 ft, 8. VI. 61 (C. H. Mann), in CNC. 
Remarks. This species is distinctive 
in having the upper ors shorter than 
the lower and the squamal fringe 
yellow. It can be compared only with 
P. f lexuosa , n. sp., with which it is 
not related, but there are clear 
differences between the two species. 
Phytomyza ceanothi Spencer, new species 
(Figs. 1146, 1147) 
Head. Frons twice width of eye, not 
projecting above eye in profile; 2 
equal ors, 1 strong ori, orbital 
311 
