Host /early stages. Unknown. 
Holotype f., Texas, Kerr Co., 
Kerrville, 21. IV. 59 (J. F. McAlpine), 
in CNC. 
Remarks. This unusual species is 
distinctive in its projecting gena, 
elongate proboscis, and long last 
section of vein M 3+4. 
Ophiomyia tiliae (Couden) , new 
combination 
(Figs. 189-192) 
Agromyza tiliae Couden, 1908: 33. 
Lectotype female, designated by 
Frick, 1957b: 200, in USNM. 
Melanagromyza tiliae, Frick, 1952a: 
380; 1959: 367. 
Hexomyza tiliae , Spencer, 1973a: 299; 
1981: 33. 
In view of the characteristic galls 
formed by this species on twigs of 
Tilia americana , it was placed in the 
gall-forming genus Hexomyza by Spencer 
(1973a). 
Examination of the male genitalia of 
one of the type series shows that the 
aedeagus (figs. 189, 190) is of the 
characteristic form of Ophiomyia 
abutilivora , a stem miner on Abutilon 
(p. 250). In view of this clear 
association, 0. tiliae must be 
transferred to Ophiomyia . The 
epandrium (fig. 191) is unusually 
square on the lower corner, with a row 
of stout bristles and some longer 
hairs, and the cercus is particularly 
broad (fig. 191). 
It is now apparent that formation of 
galls is not a valid character for 
generic delimitation, as had been 
believed. The galls, of course, 
merely represent a reaction by the 
plant to the larval feeding, and 
different plants react differently to 
feeding by larvae even in the same 
genus. However, even in (). 
abutilivora , the stem mine is not 
shallow and flat immediately below the 
epidermis, as in most Ophiomyia 
species, but it is in the form of a 
raised "welt." This almost certainly 
represents a reaction of the plant to 
the presence of the larva and can be 
accepted as a minor type of gall. 
Similar galls are formed by Ophiomyia 
f ici Spencer and Hill, 1976, in the 
leaves of Ficus microcarpa in Hong 
Kong (Spencer and Hill, 1976: fig. 3). 
Ophiomyia vibrissata Malloch 
(Figs. 279-281) 
Agromyza vibrissata Malloch, 1913a: 
316. Holotype male from Georgia in 
USNM. 
Hendel (1920: 130) synonymized 
vibrissata with 0. major Strobl from 
Europe. Frick (1952a: 382; 1959: 370) 
followed this synonymy. However, after 
comparison of a male paratype of C). 
vibrissata (now NMW) with the male 
lectotype of C). major , this synonymy 
was rejected by Spencer (1964a: 794). 
Examination of the holotype of 0. 
vibrissata (aedeagus: figs. 280, 281) 
confirms that this is a distinct 
species despite the superficial 
similarity of external characters with 
those of 0. major . 
The only record of this species has 
been from Georgia. A male and female 
have now been identified from New 
York, Long Island, Farmingdale, 
5. VI. 35 and 6. VI. 36 (Blanton and 
Borders), in CUI. Although the 
species is obviously uncommon, it 
probably will be present at suitable 
localities between Georgia and New 
York. 
Ophiomyia virginiensis Spencer, 
new species 
(Figs. 242, 243) 
Head. Frons little wider than eye, 
not projecting above eye in profile; 2 
ors, 2 equal and slightly weaker ori, 
orbital setulae sparse, reclinate; 
ocellar triangle with apex extending 
to level of lower ors; gena extending 
forward, forming angle of approx. 
45°, in center below eye narrow, 
0.14 height of eye; vibrissal 
260 
