25 (13). 2 equal ors 26 
Upper ors weaker than lower or lacking 65 
26 (25). 3d antennal segment yellow or brown 27 
3d antennal segment black 29 
27 (26). Wing pale, veins yellowish; squamal fringe yel- 
low ]?. f lavinervis Frost 
Synopsis. Frons and antenna yellowish orange, 
orbit paler yellow; 3d antennal segment virtu- 
ally bare; mesonotum and scutellum matt gray, 
acr irregularly in 4 rows; legs black, apart 
from broadly yellow knees on all femora; abdo- 
men grayish black, tergites all narrowly yellow 
bordered; wing length from 2.5 mm in male to 
3.25 mm in female; male genitalia with aedeagus 
as in figures 1139, 1140 (end of distiphallus 
missing) . 
Host/Early Stages. Unknown. 
Distribution. Texas. 
References. Frost, 1924: 85; Frick, 1959: 428; 
part 2, p. 317. 
Wing hyaline, normal, veins brown; squamal fringe 
dark 28 
28 (27). Large species, wing length 4.35 mm in female; 
frons strongly projecting above eye 
P. n. sp. (Colo.) 
Synopsis. Frons yellow, together with orbit, 
face, and palpus; 3d antennal segment orange 
yellow, narrowly brownish distally, with 
slightly longer, brownish pubescence at upper 
corner; 2 ors, 2 ori, orbital setulae irregu- 
lar, in 2 rows; gena broad, slightly over 0.5 
height of eye, this bare; mesonotum and scutel- 
lum ash gray, acr irregularly in 4 rows; pleura 
gray; legs black, apart from broadly yellow 
knees on all femora; abdomen blackish gray, all 
tergites broadly yellow bordered; squama yel- 
low, margin and fringe blackish; male genitalia 
unknown . 
Host/Early Stages. Unknown. 
Distribution. Colorado. 
Reference. Part 2, p. 323. 
Smaller species, wing length about 2.5 mm; frons 
not projecting above eye ]?. auricornis Frost 
Synopsis. Frons yellowish or brownish; antennal 
segments variable, pale yellow or yellowish 
brown, 3d with conspicuous fringe of white pu- 
bescence; palpus black on outside, yellow below; 
gena yellow, slightly less than 0.5 height of 
eye; mesonotum and scutellum grayish black, acr 
sparse but irregularly in 4 rows in front; 
pleura grayish black; legs black, femora yellow 
at knees; abdomen entirely black in female 
(holotype), tergites yellow bordered in male; 
squama yellow, margin and fringe dark; male 
genitalia with aedeagus as in figures 1141, 
1142. 
184 
