Chillcott and B. H. Poole); Mt. Evans, 
Doolittle Ranch, 9,800 ft, 2 f . , 
29. VII and 3. VIII. 61 (C. H. Mann and 
B. H. Poole); Mt. Evans, Timberline, 
11,700 ft, 1 m., 1 f., 22 and 29. VII. 61 
(S. M. Clark and W. R. M. Mason); Mt . 
Evans, Rocky Slope, 13,600 ft, 1 f., 
4. VIII. 61 (J. G. Chillcott); Mt . 
Evans, Echo Lake, 10,600 ft, 2m., 1 
f., 20. VII. 61 (B. H. Poole); Loveland 
Pass, summit, 12,000 ft, 2 f . , 
12. VII. 61 (C. H. Mann and B. H. 
Poole). Holotype and paratypes in 
CNC, other paratypes in KAS. 
Remarks. This species closely 
resembles 0 . praecisa and the male 
genitalia confirm their direct 
relationship. (). subpraecisa is 
generally smaller, the frons is not 
projecting, the gena is narrower, and 
the vibrissal fasciculus is shorter; 
in the aedeagus the cylindrical 
projection at the rear of the 
distiphallic complex present in £. 
praecisa is lacking (see figs. 222, 
223). 
£. subpraecisa has probably speciated 
relatively recently in isolation in 
the Rockies in the Mt. Evans area. 
Ophiomyia texana (Mai loch) 
(Figs. 293-295) 
Agromyza texana Malloch, 1913a: 319. 
Holotype male from Texas in USNM. 
Ophiomyia texana , Shewell, 1953: 465; 
Frick, 1957b: 201; 1959: 371. 
Ophiomyia shiloensis Spencer, 1969a: 
98. Holotype male from Manitoba in 
CNC. NEW SYNONYM. 
Ophiomyia arguta Spencer, in Spencer 
and Stegmaier, 1973: 169. Holotype 
male from Eleuthera Is., Bahamas, in 
AMNH. NEW SYNONYM. 
Ophiomyia modesta Spencer, 1981: 94. 
Holotype male from California in CAS. 
NEW SYNONYM. 
This is a small species, with a wing 
length ranging from 1.75 mm in the 
male to 2.3 mm in the female. 
It has only now been possible to 
examine the male holotype (the head is 
detached and in poor condition and 
difficult to orientate for accurate 
illustration, as stated by Frick (1959: 
452)). In consequence, Frick's figure 
(1959: fig. 53) is somewhat inaccurate 
in showing the vibrissal fasciculus to 
be broad and blunt at the end, whereas 
a distinctive feature is that it 
tapers very finely. A new illustration 
of the head is shown in figure 293. 
Both (). shiloensis from northern 
Canada and j}. modesta from southern 
California were described before 0. 
texana had been examined, but the male 
genitalia, with the distinctive 
cylindrical projection at the rear of 
the distiphallic complex, show conclu- 
sively these species are synonyms of 
£* texan a . 0. arguta from the Bahamas 
(see Spencer and Stegmaier, 1973: 
figs. 417-419) is also now recognized 
as a synonym of 0. texana . 
This is a striking example of the 
extensive north-south range of a 
number of species, which had not 
previously been suspected. 
Ophiomyia texella Spencer, new 
species 
(Fig. 180) 
Head (fig. 180). Frons narrow, equal 
to width of eye, not projecting above 
eye; 2 ors, 2 ori, all slender and 
equal, orbital setulae minute, sparse, 
reclinate; eye unusually elongate; 
gena narrow, extending forward below 
antennae, with single slender hair at 
end in female; facial keel narrow but 
high. 
Mesonotum. 2 dc , acr sparse, in 6 
rows . 
Wing. Length in female 1.4 mm, C 
extending to M 1+2, last section of 
M 3+4 1.5 times length of penultimate. 
Color. Black, ocellar triangle and 
orbits weakly shining; mesonotum and 
abdomen strongly shining; squama, 
including margin and fringe, white. 
Male genitalia. Unknown. 
259 
