Distribution. Colorado (new record); Europe, 
incl. Iceland (Griffiths, 1964). 
References. Spencer, 1976a: 512; part 2, p. 322. 
Palpus and forecoxa black P. subalpina Sehgal 
Synopsis. Frons yellow, not projecting above 
e ye; 2 equal ors, 2 ori; 3d antennal segment 
small, round, black, 1 st and 2 d segments yel- 
lowish; mesonotum and scutellum matt gray, acr 
in 2 rows; legs black, all knees narrowly yel- 
low; squama and fringe yellow; wing length 2.5 
mm in both sexes, 2 d costal section slightly 
less than twice length of 4 th; male genitalia 
with aedeagus as in figures 1158, 1159; in fe- 
male ovipositor sheath greatly extended. 
Host/Early Stages. Unknown. 
Distribution. Colorado (new record); Canada. 
Reference. Part 2, p. 321. 
42 (35). 3d antennal segment large or distinctly 
elongate 43 
3d antennal segment small, round 45 
43 (42). Entire orbit blackish, orbital setulae very 
numerous in area of ori (fig. 1160) 
7 Z* dreisbachi Steyskal 
Synopsis. Frons orange yellow, conspicuously 
projecting above eye; 2 ors, 3 or 4 ori; gena 
broad, 0.5 height of eye; 3d antennal segment 
black, elongate; mesonotum matt gray, acr in 2 
rows; legs black, all knees bright yellow; 
squama and fringe bright yellow; wing length in 
male 3.1 mm; male genitalia with aedeagus as in 
figures 1161, 1162. 
Host/Early Stages. Unknown. 
Distribution. Michigan; new record: Michigan, 
Ingham Co., East Lansing, 1 m. , 30. IV. 52 (C. W. 
Sabrosky, PSU) . 
Reference. Steyskal, 1972b: 5. 
At most upper orbit blackish, orbital setulae 
sparse 44 
44 (43). 2 d costal section short, twice length of 4th 45 
2d costal section 3 times length of 4th 
7 7 Z* ligusticifoliae Spencer 
Synopsis. Head (fig. 1163) with frons yellowish 
orange, both vt on black ground and upper orbit 
darkened to lower ors, palpus black; 1 st and 2 d 
antennal segments yellow, 3d black; mesonotum 
ash gray, acr in 4 rows; legs with coxae and 
femora black but all knees conspicuously yellow; 
abdomen black but anterior tergites laterally 
yellow; squama, including margin and fringe, 
bright yellow; wing with veins pale, yellowish, 
length in female 2.5 nun, 2 d costal section 3 
times length of 4th; male genitalia unknown. 
Host/Early Stages. Clematis ligusticifolia . 
Larva forming brownish blotch mine (fig. 1164), 
pupating externally; puparium yellowish brown, 
all segments with numerous minute papilli on 
188 
