ent, 0.5 height of eye; mesonotum matt gray, 
acr in 2-3 rows; side of thorax and leg largely 
yellow; abdomen black, with all tergites nar- 
rowly yellow bordered; squama and margin yel- 
low, fringe blackish; wing length 3.25 mm in 
female, 2d costal section short, just over 
twice length of 4th; male genitalia unknown. 
Host /Early Stages. Unknown. 
Distribution. Central California. 
Reference. Spencer, 1981: 389. 
- Hindmargin of eye largely yellow, at most nar- 
rowly black near vertical bristles 16 
16 (15). Mesonotum black, weakly shining; 1 ors 
P. f lavicornis Fallen 
Synopsis. Head (fig. 1112) largely yellow, 3d 
antennal segment yellowish brown; eye small, 
slanting, gena broad, only slightly narrower 
than height of eye; acr sparse, in 2 rows; side 
of thorax largely bright yellow, legs yellow; 
wing length 2.25-2.7 mm; male genitalia with 
aedeagus (figs. 1113, 1114) having basal scle- 
rites widely diverging, distiphallus largely 
unpigmented . 
Host/Early Stages. Urtica spp. Larva feeding 
in pith of stem and pupating internally; pu- 
parium slender, yellowish. 
Distribution. Indiana, Michigan; new records: 
Oregon, Columbia Co., Vernonia, 5 f . , 23. IV. 38, 
sweeping herbs under brush (K. Gray and J. 
Schuh); Crook Co., Ochocho Ranger Station, 
1 m. , 1 f . , 3.V.39 (Schuh and Gray); Canada, 
Europe . 
References. Spencer, 1969a: 240; 1976c: 417. 
Note. The specimens from Oregon were mis identi- 
fied by Frick (1959: 435) as P. ruf ipes Mg. 
— Mesonotum matt gray 17 
17 (16). Gena broad, almost equal to height of eye; abdo- 
men matt gray _P. genalis Melander 
Synopsis. Head yellow, frons strongly project- 
ing above eye; 2 reclinate ors, 2 longer in- 
clined ori; 3d antennal segment distinctly 
longer than broad; gena exceptionally broad, 
almost equal to height of eye, this unusually 
small; mesonotum and scutellum uniformly matt 
gray, acr sparse, in 2 rows; side of thorax 
largely yellow, mesopleuron with small, faint 
grayish markings on lower and front margins; 
legs with coxae and femora entirely yellow, 
tibiae and tarsi yellowish brown; squama yellow, 
margin and fringe slightly darker; wing length 
in male 3 mm, 2d costal section 2.5 times 
length of 4th; male genitalia with aedeagus as 
in figures 1115, 1116. 
Host/Early Stages. Unknown. 
Distribution. Illinois. 
References. Frick, 1959: 428; part 2, p. 317. 
180 
