brown, orbit grayish; lunule blackish gray; 
gena, face, 1st and 2d antennal segments black 
or ochreous, 3d antennal segment black; pro- 
boscis elongate (fig. 1251); mesonotum and 
scutellum matt blackish gray, side of thorax 
black; legs entirely black; squama yellowish 
gray, margin and fringe black; wing length 
from 3.1 mm in male to 3.25 mm in female 
(holotype), 2d costal section 3 times length of 
4th; male genitalia with aedeagus as in figure 
1252. 
Host/Early Stages. Unknown. 
Distribution. New York; new records: Indiana, 
Tippecanoe Co., Lafayette, 1 m. , 1 f., 24.V.17 
(J. M. Aldrich, USNM) ; Virginia, Smyth Co., Mt . 
Rogers, 1 f., 1.VI.62 (J. R. Vockeroth, CNC) . 
Reference. Frick, 1959: 426. 
Abdomen predominantly black or gray 86 
86 (85). Tarsi distinctly yellow 87 
Tarsi darker 88 
87 (86). Mesonotum black, moderately shining 
Chromatomyia tiarellae Griffiths 
Synopsis. Frons largely brown but somewhat yel- 
lowish above ocellar plate; 3d antennal segment 
round, black; mesonotum with acr in 5-6 rows; 
side of thorax dark; legs with femora black, 
knees yellow, tibiae and tarsi conspicuously 
yellow; squama whitish gray, margin and fringe 
black; wing length 2. 1-2.5 mm, 2d costal sec- 
tion long, 3-3.5 times length of 4th; male 
genitalia with aedeagus as in figures 1253, 
1254. 
Host/Early Stages. Heuchera micrantha and 
Tell ima grandiflora (Calif.), Tiarella trifoli - 
ata and Tolmiea menziesii (Alaska). Larva 
forming whitish linear mine up to 25 cm long 
(fig. 1255); puparium brown or white, within 
leaf at end of mine on lower surface, posterior 
spiracles each with about 20 bulbs. 
Distribution. California; Alaska, Canada. 
References. Griffiths, 1972a: 74; Spencer, 
1981: 454. 
Mesonotum more grayish black P. agromyzina Meigen 
Synopsis. Frons dark or ochreous brown, not 
projecting above eye, 2 equal ors, 1 or 2 ori; 
gena brown, narrow, 0.2 height of eye; 3d an- 
tennal segment small, round, black or slightly 
paler, brownish; acr in 4 rows; side of thorax 
dark; femora black, with all knees yellow, 
tibiae and tarsi distinctly yellowish, particu- 
larly on foreleg; squama yellowish gray, margin 
and fringe black; wing length 2-2.25 mm, 2d 
costal section 3-4 times length of 4th; male 
genitalia with aedeagus as in figure 1256. 
Host/Early Stages. Cornus californica and other 
Cornus spp. Larva forming long, narrow mine 
204 
