Holotype male from Massachusetts in 
USNM. 
Melanagromyza salicis, Frick, 1959: 
365. 
Hexomyza salicis , Spencer, 1966a: 39; 
1969a: 80 (under H. albicula ) ; 
1969b: 13. 
There has been doubt about the status 
of this species. Spencer (1966a) 
treated the European species, H. 
cecidogena Hering, 1927, as a junior 
synonym of H. salicis and later 
(1969a) suggested that H. salicis 
might be synonymous with H. 
simplicoides (Hendel) rather than with 
H. cecidogena . 
The holotype of H. salicis has been 
examined and probably represents a 
distinct species. Differences in the 
aedeagus between this group of gall 
causers on Salix are slight, but 
larval and puparial characters are 
distinctive. The early stages of H. 
salicis are not known, and further 
clarification of this species must 
wait until reared material becomes 
available. 
The aedeagus of the holotype of H. 
cecidogena was illustrated by Spencer 
(1966a: figs. 60, 61) and the 
posterior spiracles of the puparium by 
Spencer (1969b: fig. 14). The 
aedeagus of H. salicis is shown in 
figures 152, 153. 
Hexomyza winnemanae (Malloch), new 
combination 
(Figs. 143-145) 
Agromyza winnemanae Malloch, 1913a: 
314. Holotype female from Maryland 
in USNM. 
Melanagromyza winnemanae , Frick, 
1952a: 380; 1959: 367. 
Hexomyza albicula Spencer, 1969a: 79. 
Holotype male from Ontario in CNC. 
NEW SYNONYM. 
H. albicula , a distinctive species 
with unusually pale wings, the costa 
ending at vein R 4+5, and the squamal 
fringe pale, was described before the 
true identity of H. winnemanae was 
known. The female holotype has now 
been examined and we are satisfied 
that it is identical with H. albicula , 
a gall causer on Salix . 
Shewell (1953: 465) correctly wrote of 
H. winnemanae : "This is a problematic 
species" and suggested that it might 
belong in Ophiomyia . However, its 
correct status is now clarified and it 
is formally transferred to Hexomyza , 
with H. albicula as a junior synonym. 
GENUS OPHIOMYIA BRASCHNIKOV 
Fourteen new species are described, 7 
new synonyms are established, and 5 
new combinations are proposed. In 
addition, five species are recorded as 
new to the United States. 
Ophiomyia abutilivora Spencer, new 
species 
(Figs. 196-199) 
Head (fig. 196). Frons little wider 
than eye, not projecting above eye in 
profile; 2 ors, 2 ori, orbital setulae 
sparse, reclinate; ocellar triangle 
broad, large, apex extending to level 
of lower ors; gena not projecting 
forward, deepest in center, 0.14 
height of eye; antennal bases narrowly 
separated; facial keel variable, some- 
times distinctly raised; 3d antennal 
segment small, round. 
Mesonotum. 2 dc, acr sparse, in 6-8 
rows . 
Wing. Length from 2 mm in male to 2.3 
mm in female, C extending strongly to 
M 1+2, last section of M 3+4 0.67 
penultimate, inner crossvein well 
beyond center of discal cell. 
Color. Black, with greenish trace; 
ocellar triangle brilliantly shining; 
both mesonotum and abdomen strongly 
shining; squama gray, margin and 
fringe black. 
Male genitalia. Aedeagus as in 
figures 197, 198; hypandrium with 
conspicuously extended apodeme; sperm 
250 
