— Not so 44 
44 (43). Frons broad, twice width of eye 0. delecta Spencer 
Synopsis. Wing length in male 2.1 mm, last section 
of M 3+4 slightly shorter than penultimate, in 
ratio 9:11; ocellar triangle short, broad, not 
reaching level of lower ors; head (fig. 270) with 
gena narrow, 0.17 height of eye; fasciculus in 
male slender, only slightly curving; facial keel 
narrow but distinctly raised above base of anten- 
nae, unfurrowed; ocellar triangle, mesonotum, and 
abdomen moderately shining black; male genitalia 
with aedeagus as in figures 271, 272. 
Ho st /Early Stages. Unknown. 
Distribution. California. 
Reference. Spencer, 1981: 79. 
— Frons at most 1.5 times width of eye 
0 . asymmetrica Spencer, n. sp. 
Synopsis. Wing length in male 2 mm; head (fig. 
273) with gena 0.125 height of eye; ocellar tri- 
angle large, apex extending to level of lower ors, 
dull, paler than frons; facial keel of medium 
width and height; male genitalia with aedeagus 
characteristically asymmetrical in ventral view 
(figs. 274, 275). 
Host/Early Stages. Unknown. 
Distribution. North Carolina. 
Reference. Part; 2, p. 252. 
45 (24). Large species, wing length in male at least 2.5 mm- 46 
— Smaller species, wing length in male less than 2.5 
mm 48 
46 (45). Exceptionally large species, wing length in male 
2. 8- 3.0 mm 47 
Smaller species, wing length in male 2.5 mm 
0. f ida Spencer 
Synopsis. Frons strongly projecting above eye, 
broad, 2-2.5 times width of eye; 3 or 4 ori; ocel- 
lar triangle ill-defined, scarcely detectable be- 
yond apex of ocellar plate; gena broad, 0.33 
height of eye; fasciculus in male short, sometimes 
incompletely fused (fig. 276); facial keel of 
medium width, distinctly furrowed, only slightly 
raised; male genitalia with aedeagus as in figures 
277, 278. 
Host/Early Stages. Unknown (possibly Urtica on 
which holotype was caught). 
Distribution. California. 
Reference. Spencer, 1981: 83. 
47 (46). 3 ori 0 . vibrissata (Mai loch ) 
Synopsis. Wing length 2. 8-3.0 mm; frons broad, 
twice width of eye, at most very slightly pro- 
jecting above eye; normally 5 orbital bristles, 
(not 6 as stated in original description); ocellar 
triangle scarcely shining, not extending below 
level of upper ors; gena broad, 0.33 height of eye; 
fasciculus in male broad, tapering (fig. 279); 
facial keel high but narrow, with distinct furrow 
49 
