Ophiomyia similata (Malloch), new 
combination 
(Figs. 171-173) 
Agromyza similata Malloch, 1918b: 178. 
Holotype male from Illinois in INHS. 
Melanagromyza similata, Frick, 1952a: 
379; 1959: 366. 
Melanagromyza orientalis Spencer, 
1969a: 73. Holotype male from 
Ontario in CNC. NEW SYNONYM. 
This species was described from a 
single male. Frick (1959) noted that 
C ends at vein R 4+5, although this 
was not referred to in the original 
description. We believe the reason 
why Malloch failed to mention this 
character is that C could be taken as 
continuing weakly to M 1+2. 
It is clear from the male genitalia 
that £. orientalis is identical with 
similata , and this new synonymy is 
formally established here. The 
termination of C at R 4+5 was not 
noticed when describing 0. orientalis , 
but reexamination of male and female 
paratypes by KAS confirms that there 
can be doubt as to the exact extent of 
the costa, and it appears to be more 
strongly defined to M 1+2 in the 
female. The species has therefore 
been included in both couplets 5 and 
15 to allow for both interpretations. 
Two new illustrations of the aedeagus 
given in figures 171, 172, as those 
included with the description of M. 
orientalis (Spencer, 1969a: figs. 104, 
105), are not entirely in side and 
ventral views and may appear 
misleading. The form of the aedeagus 
strongly suggests that this species 
correctly belongs in Ophiomyia , 
somewhat resembling that of 0. 
abutilivora , which is now known as a 
stem miner on Abut il on , and the 
species is now formally transferred to 
Ophiomyia . 
The second record of this uncommon 
species in the United States has now 
been confirmed from New York, Ithaca, 
1 male, 1 female (no head), in copula- 
tion, 28.V.62 (L. V. Knutson), CUI. 
0. similata closely resembles (). 
fastosa (p. 255), and the male 
genitalia show the two to be closely 
related. However, in (). fastosa , C 
extends very strongly to M 1+2, there 
are three ori, and the species is 
larger. It has possibly speciated at 
its present high elevation in Colorado. 
Ophiomyia subpraecisa Spencer, new 
species 
(Figs. 230, 231) 
Head. Frons broad, twice width of 
eye, not projecting above eye in 
profile; 2 ors, 2 ori, orbital setulae 
sparse, reclinate; ocellar triangle 
with apex extending to lower ors; gena 
broad, 0.33 height of eye; vibrissal 
corner forming angle of 45°, fasci- 
culus in male short; facial keel 
broad, conspicuously raised, with low 
furrow on upper half. 
Mesonotum. Normally 2 dc (rarely a 
small 3d present), acr in some 8 rows. 
Wing. Length from 2.1 mm in male to 
2.3 mm in female, C extending strongly 
to M 1+2, last section of M 3+4 about 
0.67 penultimate, inner crossvein well 
beyond midpoint of discal cell. 
Color. Black, ocellar triangle weakly 
shining; mesonotum and abdomen more 
distinctly shining; squama gray, 
margin and fringe black. 
Male genitalia. Aedeagus as in 
figures 230, 231, distiphallic complex 
round behind, narrowing centrally, and 
then again widening. 
Host/early stages. Unknown. 
Distribution. Colorado, Mt. Evans 
area . 
Holoptype m. , Colorado, Lake Co., Inde- 
pendence Pass, 12, 100, ft, tundra, 
7. VIII. 61 (C. H. Mann); paratypes 27 
m. , 2 f., same data; 9m., 11 f., 
31. VII. and 7. VIII. 61 (J. G. Chillcott 
and B. H. Poole); Gunnison-Chaf fee Co. 
dividing line, Cottonwood Pass, 2 m. , 
1 f., 31. VII and 7. VIII. 61 (J. G. 
258 
