1st and 2d paler; mesonotum blackish gray, acr 
in 4-6 rows; legs with femora black, all knees 
distinctly yellow; squama yellowish white, mar- 
gin and fringe black; wing length 2. 5-2.9 mm, 
2d costal section about 3 times length of 4th; 
male genitalia with aedeagus (figs. 1262, 1263) 
having supporting sclerites slender, diverging 
slightly at distal end, "wedge-shaped" scle- 
rites prominent, sclerites of ventral lobe 
tapering, with ejaculatory duct distinctly 
pigmented; sperm pump minute. 
Host/Early Stages. Arctagrostis latifolia , 
Calamagrostis (Germany), Cinna latifolia 
(British Columbia), Vahlodea atropurpurea 
(Alberta). Leaf mine linear, becoming somewhat 
broader; puparium remaining adjacent to upper 
or lower leaf surface, with anterior spiracles 
projecting ventrally through epidermis. 
Distribution. Colorado (new record); Canada, 
Europe - Lapland and mountains of central 
Europe (Germany). 
References. Griffiths, 1980: 18; part 2, p. 329. 
95 (90). Mesonotum shining black P. phaceliae Spencer 
Synopsis. Frons and all antennal segments deep 
black, orbit shining black; 2 equal ors, 1 ori, 
orbital setulae strong, in single row; side of 
thorax, legs, and abdomen black; squama yellow- 
ish gray, margin black; wing base conspicuously 
yellowish; wing length in female 2.3 mm, 2d 
costal section 2.67 length of 4th; male geni- 
talia unknown. 
Host/Early Stages. Phacelia californica . Larva 
forming linear blotch mine (fig. 1264), pupa- 
tion externally; puparium brown, posterior 
spiracles each on low conical projection, with 
ellipse of about 12-15 bulbs. 
Distribution. Central California. 
Reference. Spencer, 1981: 413. 
Mesonotum more matt black or grayish black 96 
96 (95). Eye conspicuously pilose — Chromatomyia nigra (Meigen) 
Synopsis. Frons variable, from ochreous yellow 
to dark brown, orbit frequently paler or more 
grayish; 2 equal ors, 1 ori; 3d antennal seg- 
ment small, round, black, at most 1st segment 
slightly paler; mesonotum matt grayish black, 
acr in 2 rows; legs black but all knees dis- 
tinctly yellow; squama yellowish gray, margin 
black; wing length in male 1.9-2. 6 mm, in fe- 
male 1.8-2. 8 mm, 2d costal section normally 
from 2 to 2.5 times length of 4th; male geni- 
talia with aedeagus (fig. 1265) having 2 pairs 
of dorsal (supporting) sclerites and additional 
pair of dorsally directed sclerites connected 
to near apex of basal sclerites; ejaculatory 
duct strongly pigmented, with characteristic 
sinuate curvature; sperm pump small, base 
asymmetrical . 
207 
