thorax largely yellow, mesopleuron blackish 
along front and lower margin; legs black but 
all knees yellow; male genitalia unknown. 
Host /Early Stages. Unknown. 
Distribution. California (mountains). 
Reference. Spencer, 1981: 422. 
Smaller species, wing length at most 3.25 mm in 
female 4 
4 (3). 2 ors equal 5 
Upper ors shorter than lower or absent 7 
5 (4). Mesonotum banded, yellow and gray (fig. 1092) 6 
Mesonotum uniformly grayish black 
Chroma tomyi a compta Spencer, n. sp. 
Synopsis. Head yellow, apart from black 3d 
antennal segment, this with distinct fringe of 
whitish pubescence; mesonotum matt gray, scute 1- 
lum largely yellow; side of thorax and femora 
bright yellow, abdomen largely yellow; wing 
length 2.6-3.25 mm; male genitalia with aedea- 
gus (fig. 1089) having conspicuously strong 
sclerites of dorsal lobe, ejaculatory duct 
extended , s inuous . 
Host/Early Stages. Unknown. 
Distribution. North Carolina, Virginia, Ten- 
nessee . 
Reference. Part 2, p. 324. 
6 (5). Frons projecting above eye (see Frick, 1959: 
fig. 168); mesonotum without acr; wing with 2d 
costal section short, equal to or at most 1.5 
times length of 4th P. trivittata Frost 
Synopsis. Head yellow, 3d antennal segment 
black, 1st and 2d bright yellow; mesonotum di- 
vided into bands (see Frick, 1959: fig. 170), 
dark area gray, yellow adjoining scutellum; 
pleura largely yellow, mesopleuron faintly 
grayish along margins; legs yellow, tibiae and 
tarsi only slightly darker; wing length from 
about 2 mm in male to 2.9 mm in female; male 
genitalia with aedeagus as in figures 1090, 
1091. 
Host/Early Stages. Cordylanthus nevinii 
( Scrophulariaceae) . Larva probably feeding 
in flower heads, early stages unknown. 
Distribution. California, Nevada; new record: 
Colorado, Larimer Co., Estes Park, 7,500 ft, 
1 f., 20. VII. 65 (C. H. Mann, CNC) . 
References. Frick, 1959: 436; Spencer, 1981: 
430. 
Frons not projecting above eye; acr in 2-3 rows; 
2d costal section 2.5 times length of 4th 
P. clematiphaga Spencer 
Synopsis. Head yellow, 3d antennal segment 
black, 1st and 2d bright yellow; dark area of 
mesonotum ash gray, broadly yellow adjoining 
scutellum (fig. 1092); side of thorax largely 
yellow, mesopleuron gray along front and lower 
176 
