40 (39). 
41 (34). 
42 (41). 
43 (42). 
fasciculus in male short, broad at base, finely 
tapering (fig. 259); facial keel conspicuously 
raised, almost spherical at base of antennae; male 
genitalia with aedeagus as in figures 260, 261. 
Host/Early Stages. Unknown. 
Distribution. North Carolina. 
Reference. Part 2, p. 253. 
Last section of M 3+4 shorter than penultimate 40 
Vibrissal fasciculus in male short (fig. 262) 
0 . vockerothi Spencer, n. sp. 
Synopsis. Wing length in male 1.9 mm, last 
section of M 3+4 little shorter than penultimate; 
frons narrow, approx, equal to width of eye; gena 
broad, 0.33 height of eye; facial keel broad, 
moderately raised, without central furrow; male 
genitalia with aedeagus asymmetrical (figs. 263, 
264). 
Host/Early Stages. Unknown. 
Distribution. North Carolina. 
Reference. Part 2, p. 261. 
Vibrissal fasciculus in male longer 
0. texana (Malloch) 
(Vibrissal angle normally less acute, forming 
angle of 80°, couplet 52) 
Facial keel with distinct central furrow 
0 . lacertosa Spencer 
Synopsis. Wing length 2.4 mm, last section of 
M 3+4 little shorter than penultimate; gena 0.17 
height of eye, parafacial broad, more than half 
width of gena; vibrissal fasciculus in male short, 
regularly curving (fig. 265); facial keel of 
medium width, conspicuously raised above base of 
antennae; ocellar triangle moderately, mesonotum 
distinctly shining black; male genitalia with 
aedeagus as in figures 266, 267. 
Host/Early Stages. Unknown. 
Distribution. Florida; Canada. 
Reference. Spencer and Stegmaier, 1973: 59. 
Facial keel without furrow 42 
Facial keel broad 0. subdef inita Spencer, nom. nov. 
Synopsis. Wing length in male 2.1 mm, last section 
of M 3+4 shorter than penultimate, in ratio 17:21; 
gena narrow, 0.17 height of eye; fasciculus in 
male tapering, scarcely curving; ocellar triangle, 
mesonotum, and abdomen moderately shining black; 
male genitalia with aedeagus as in figures 268, 
269. 
Host/Early Stages. Unknown. 
Distribution. California. 
Reference. Spencer, 1981: 78 (as 0. definita 
preocc. Spencer, 1971a: 148 - England). 
Facial keel narrow 43 
Male genitalia with aedeagus as in figures 294, 
295, distiphallus complex with distinctive cylin- 
drical projection at rear 0 . texana (Malloch) 
(Vibrissal angle normally less acute, forming angle 
of approx. 80°, couplet 52) 
48 
