distiphallus is entirely membranous 
and unpigmented (not shown in fig. 
1216). This is illustrated by 
Griffiths (1976b: fig. 25) though 
probably somewhat formalized. 
Phytomyza evansi Spencer, new species 
(Figs. 1351, 1352) 
Head. Frons twice width of eye, 
narrowly projecting above eye, orbit 
strongly differentiated; 2 ors, upper 
shorter (lacking in 1 of 8 specimens), 
2 ors, upper equal to lower ors, lower 
greatly reduced; gena broad, somewhat 
more than 0.33 height of eye, 
parafacial prominent; 3d antennal 
segment rounded, slightly longer than 
broad. 
Mesonotum. 3+1 dc , acr sparse, in 2 
rows. 
Wing. Length from 2 mm in male to 2.3 
mm in female, 2d costal section short, 
1.5-1. 7 times length of 4th. 
Color. Frons blackish below, more 
brownish above and beside ocellar 
plate; orbit blackish gray, narrowly 
yellow along inner margin; gena dark 
brown, face, palpus, and antenna 
black; mesonotum and scutellum matt 
blackish gray, side of thorax entirely 
dark; legs black but forefemur narrowly 
yellowish, on other legs less so; 
squama gray, margin and fringe black. 
Male genitalia. Aedeagus (figs. 1351, 
1352) with row of long spinules along 
left basal sclerite; distiphallus 
membranous basal ly, more pigmented 
from midpoint, 2 tubules recurved 
basally but finally directed dorsally; 
ventral lobe swung forward, strongly 
sclerotized; sperm pump large, with 
broad, pale blade. 
Host/early stages. Unknown. 
Holotype m. , Colorado, Clear Creek 
Co., Mt. Evans, 14,000 ft, 25. VII. 61 
(B. H. Poole); paratypes 4m., 2 f . , 
same data (B. H. Poole and J. G. 
Chillcott); Mt. Evans, Summit Lake 
Flats, 12,800 ft, 1 m. , 24. VII. 61 (C. 
H. Mann). Holotype and paratypes in 
CNC, 2 paratypes in KAS. 
Remarks. The male genitalia indicate 
that this species belongs to the P. 
albiceps group (see Griffiths, 1976b), 
which includes leaf miners on Apiaceae 
and Asteraceae having the frons either 
yellow or dark. A distinctive char- 
acter is the arrangement of spinules 
beside the basal sclerites. Although 
closely resembling P. aralivora , the 
two species are not closely related. 
Phytomyza flavens Spencer, new species 
(Figs. 1192, 1193) 
Head. Frons broad, almost 3 times 
width of eye, distinctly projecting 
above eye in profile; 2 equal ors, 2 
strong ori, orbital setulae strong, 
irregularly in 2 rows; gena extended 
at rear, slightly more than 0.5 height 
of eye, parafacial forming broad ring 
below eye; 3d antennal segment small, 
round, with distinct, though short 
pubescence. 
Mesonotum. 3+1 dc, acr irregularly in 
4 rows . 
Wing. Length in male 3.25 mm, 2d 
costal section twice length of 4th. 
Color. Frons, gena, face, 1st and 2d 
antennal segments, and entire hind- 
margin of eye bright yellow; 3d anten- 
nal segment and palpus black; mesonotum 
and scutellum matt gray, side of thorax 
similar, with only upper margin of 
mesopleuron narrowly yellow; legs 
black, knees bright yellow; abdomen 
largely matt blackish gray but all 
tergites conspicuously yellow 
bordered; squama yellowish gray, 
margin and fringe black. 
Male genitalia. Aedeagus (figs. 1192, 
1193) with distiphallus divided, lying 
at right angles to basal sclerites; 
sperm pump large, blade triangular, 
weakly pigmented along upper margin. 
Host/early stages. Unknown. 
Holotype m. , Colorado, Boulder Co., 
316 
