inconspicuously paler; squama gray, fringe 
black; wing length 1.5-1. 9 mm; male genitalia 
with aedeagus (fig. 1332) having distiphallus 
directed dorsally, paired tubules strongly 
pigmented at base, membranous apically, strong- 
ly divergent (fig. 1333); ejaculatory duct 
rising dorsally from near distal end of basal 
sclerites to base of distiphallus; sperm pump 
minute . 
Host/Early Stages. Clematis spp. , including C. 
ligusticifolia and £. verticillaris . Larva 
forming upper surface linear mine which greatly 
widens (fig. 1334) and can appear as blotch in 
small leaves; puparium brownish, posterior 
spiracles each with heavily sclerotized branch 
having about 15-20 irregular bulbs. 
Distribution. California, District of Columbia, 
Idaho, Indiana, Louisiana, Washington; new 
record: Georgia, Rabun Co., Pine Mountain, 
1,400 ft, 1 m. , 4.V.57 (J. R. Vockeroth, CNC) ; 
Canada. 
References. Frick, 1959: 430; Spencer, 1969a: 
251; 1981: 395. 
Acr in 2 rows or lacking 126 
126 (125). Frons yellowish dorsally; acr lacking 
P. aquilegivora Spencer 
(If frons considered as predominantly pale, see 
couplet 70.) 
Frons darker, brownish gray; acr in 2 rows 
P. thalictrivora Spencer 
Synopsis. Closely resembling P. aquilegivora , 
differing in darker frons, more shining meso- 
notum, presence of acr, and longer 2d costal 
section, which is 2.5 times length of 4th; male 
genitalia with aedeagus (fig. 1335) having 
distiphallus long, slender, sinuate. 
Host/Early Stages. Thalictrum spp. (in Alberta, 
jT. venulosum ) . Larva forming upper surface 
linear mine, appearing blotchlike in small 
leaves; puparium orange brown. 
Distribution. (?) Northern Florida; Canada. 
References. Spencer, 1969a: 279; Spencer and 
Stegmaier, 1973: 122 (tentative identification 
from single caught female). 
127 (117). 2d costal section long, 3-4 times length of 4th 
12g 
2d costal section shorter, less than 3 times 
length of 4th 131 
128 (127). Small species, wing length 1.75-2 mm 
P. saniculae Spencer 
Synopsis. Frons twice width of eye, blackish, 
paler only beside ocellar triangle; orbit paler, 
sometimes yellowish; 2 ors, upper substantially 
shorter than lower, 2 ori; antenna black, 3d 
segment small, round; legs with femora black, 
having only foreknee distinctly yellow, tibiae 
218 
