above; mesonotum and abdomen shining black; squama 
gray, margin and fringe black; male genitalia with 
aedeagus as in figures 280, 281 (holotype). 
Host/Early Stages. Unknown. 
Distribution. Georgia, New York (new record). 
References. Malloch, 1913a: 316; Frick, 1959: 
370; part 2, p. 260. 
2 ori 0 . carolinae Spencer, n. sp . 
Synopsis. Agreeing closely with 0. vibrissata , 
possibly slightly larger, wing length in male 3 
mm; gena forming angle of approx. 90°; fasci- 
culus in male strong but tapering; facial keel 
narrow, rather low, with furrow throughout; male 
genitalia with aedeagus as in figures 282, 283. 
Host/Early Stages. Unknown. 
Distribution. North Carolina. 
Reference. Part 2, p. 253. 
48 (45). Frons distinctly projecting above eye 49 
— Frons not projecting 51 
49 (48). 2 ori 0. eldorensis Spencer, n. sp. 
Synopsis. Frons twice width of eye; ocellar tri- 
angle ill-defined, matt; gena forming angle of 
80°; vibrissal fasciculus in male short (fig. 
284); wing length in male 2.1 mm, inner crossvein 
at distal 3d of discal cell; male genitalia with 
aedeagus bowl shaped (figs. 285, 286). 
Host/Early Stages. Unknown. 
Distribution. Colorado. 
Reference. Part 2, p. 254. 
3 ori 50 
50 (49). Gena broad, up to 0.5 height of eye 
0. fastella Spencer 
Synopsis. Frons broad, twice width of eye; gena 
forming angle of 80°-90°; fasciculus in male 
short, incompletely fused; ocellar triangle and 
mesonotum strongly shining; wing length in male 
2.1 mm; male genitalia with aedeagus as in figures 
287-289. 
Host/Early Stages. Unknown. 
Distribution. California. 
Reference. Spencer, 1981: 82. 
Gena 0.33 height of eye 0. sexta Spencer 
Synopsis. Frons broad, twice width of eye; gena 
forming angle of 90°; fasciculus in male short, 
with normal curvature (fig. 290); ocellar triangle 
scarcely shining; facial keel moderately raised, 
with distinct central furrow; wing length from 2.3 
mm in male to 2.7 mm in female; male genitalia 
with aedeagus as in figures 291, 292. 
Host /Early Stages. Unknown. 
Distribution. Colorado (new record); Canada. 
References. Spencer, 1969a: 98; part 2, p. 257. 
51 (48). Gena relatively broad, 0.33-0.25 eye height 52 
Gena narrower, 0.20-0.17 eye height 54 
52 (53). Facial keel without furrow 0 . texana (Malloch) 
Synopsis. Frons not projecting above eye, width 
50 
