Ophiomyia asymmetrica Spencer, new 
species 
(Figs. 273-275) 
Head (fig. 273). Frons 1.5 times 
width of eye, not projecting above eye 
in profile; 2 ors, 2 ori, orbital 
setulae sparse, reclinate; ocellar 
triangle large, apex extending to 
level of lower ori; gena forming angle 
of 60°, narrow, about 0.125 height 
of eye; vibrissal fasciculus in male 
long, curving beyond antennae; facial 
keel of medium width and height and 
without central furrow. 
Mesonotum. 2 dcr, acr in 8 rows. 
Wing. Length in male 2.0 mm, last 
section of M 3+4 little shorter than 
penultimate, inner crossvein only 
slightly beyond midpoint of discal 
cell. 
Color. Ocellar triangle and orbits 
paler than frons, entirely dull; 
mesonotum and abdomen only moderately 
shining black; squama gray, margin and 
fringe black. 
Male genitalia. Aedeagus highly 
asymmetrical as in figures 274, 275. 
Host/early stages. Unknown. 
Holotype m. , North Carolina, 
Highlands, 3,888 ft, 12. VII. 57 (J. G. 
Chillcott); paratype m. , same data; 
both in CNC • 
Remarks. Although closely resembling 
delecta and C). carolinensis , the 
male genitalia of this new species 
immediately show that it is distinct. 
Ophiomyia banffensis Spencer (new 
to U.S.A.) 
(Figs. 161-163) 
Ophiomyia banffensis Spencer, 1969a: 
83. Holotype male from Alberta in 
CNC. 
This distinctive species has hitherto 
been known only from Alberta and 
Saskatchewan. A single male can now 
be recorded from Colorado, Boulder, 
6,000 feet, 16.V.61 (B. H. Poole), in 
CNC. 
With the costa ending at vein R 4+5 
and the squamal fringe white, 0. 
banffensis superficially resembles 
Hexomyza winnemanae (p. 250), but it 
is distinguishable by the distinct, 
though narrow, facial keel. 
Ophiomyia boulderensis Spencer, new 
species 
(Figs. 207-209) 
Head (fig. 207). Frons broad, twice 
width of eye, conspicuously projecting 
above eye in profile; 3 ors, 2 ori, 
all slender, approx, equal, orbital 
setulae sparse, reclinate; ocellar 
triangle detectable in outline only; 
gena broad, rounded, not projecting 
forward, parafacial unusually broad, 
filling about half distance between 
lower margin of eye and of gena; vi- 
brissa and 2 other bristles strong but 
not fully fused into fasciculus, few 
slender peristomal hairs behind; 3d 
antennal segment small, round, arista 
short, bare; facial keel raised but 
narrow. 
Mesonotum. 2 dc, acr sparse. 
Wing. Length in male 2.5 mm, in female 
up to 3 mm, C extending strongly to 
M 1+2, inner crossvein well beyond 
center of discal cell, last section of 
M 3+4 only slightly shorter than 
penultimate, in ratio 6:7. 
Color. Black, ocellar triangle not 
shining; mesonotum and abdomen only 
moderately shining; squama gray, 
margin and fringe black. 
Male genitalia. Aedeagus as in 
figures 208, 209. 
Host/early stages. Unknown. 
Holotype m. , Colorado, Boulder Co., 
Boulder, 6,900 ft, 17. VI. 61, "mountain 
meadow with Ponderosa Pine" (C. H. 
Mann); paratypes, 2 f . , Boulder, 
4. VI. 61; 1 m. , Boulder, 5,500 ft, 
252 
