epandrium (fig, 1007) with conspicuous comb of 
spines, surstylus with single spine at base and 
several hairs along margin. 
Host /Early Stages. Unknown. 
Distribution. Washington; new record: Idaho, 
Blaine Co., Galena, 7,600 ft, 15. VII. 61 (J. G. 
Chillcott , CNC) . 
References. Melander, 1913: 264; Spencer, 1969a: 
195. 
18 (11). Scutellum grayish black 19 
Scutellum at least faintly yellow centrally 20 
19 (18). Discal cell small, last section of vein M 3+4 twice 
length of penultimate P. clara (Melander) 
Synopsis. Frons bright yellow in front, somewhat 
darker at rear; upper orbit blackish, 2 ors, 1 
ori, orbital setulae sparse, reclinate; 3d anten- 
nal segment normally bright yellow, sometimes more 
brownish; mesonotum uniformly matt grayish black, 
3+1 dc, acr sparse, in 2-4 rows; legs and pleura 
yellow; wing length 2 mm, last section of M 3+4 
twice length of penultimate; male genitalia with 
aedeagus having 2 long, curving tubules, slightly 
dilated at end (fig. 1008); epandrium (fig. 1009) 
with row of strong bristles along inner margin, 
surstylus with comb of about 8 strong spines. 
Host/Early Stages. Pteridium aquilinum . Larva 
forming narrow upper surface mine, pupating 
externally; puparium brown, posterior spiracles 
each with 3 bulbs. 
Distribution. Widespread, known from California, 
Maryland, Michigan, Tennessee, Washington; new 
records: Arizona, Cochise to Chiricahua Mts., 
6.500 ft, near Portal, leaf mines on bracken; 
Coconino Co., Mount Humphrey, near Flagstaff, 
8,800 ft; New Mexico, Catron Co., Gila Wilderness, 
7.500 ft; all Aug. -Sept. 1979 (J. H. Lawton). 
References. Spencer, 1969a: 200 (as Pteridomyza 
hilarella ) ; 1981: 319. 
— Discal cell larger, last section of M 3+4 only 1.5 
times length of penultimate 
P. pulchella Spencer, n. sp. 
Synopsis. Closely resembling P. clara , externally 
apparently distinguishable by larger discal cell; 
head as in figure 1010; male genitalia with aedea- 
gus as in figure 1011, with distal tubules rela- 
tively short, recurved and dilated at end; epan- 
drium and surstylus as in figure 1012. 
Host/Early Stages. Unconfirmed, probably Pteridium 
aquilinum . 
Distribution. New York. 
Reference. Part 2, p. 304. 
20 (18). Palpus yellow P. leechi Spencer 
Synopsis. Frons, hindmargin of eye, gena, face, 
and palpus yellow; 3d antennal segment large, 
black, 1st and 2d yellow; 2 ors, 1 ori, orbital 
setulae sparse, upright, or even lacking; mesono- 
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