Agromyza masculina Sehgal (new to 
U.S.A.) 
(Figs. 449-451) 
This species has been known from two 
specimens from Alberta, one from 
Blairmore in the Rockies at 6,000 feet 
and the other from Okotoks, about 80 
km farther east and at a lower 
elevation. 
A single male from Utah, Cache County, 
Green Canyon, 9. VII. 69, Malaise trap, 
(W. J. Hanson), in USU, is referable 
to A. masculina . This species belongs 
to the A. potent illae group and 
appears to be most closely related to 
A. vockerothi (figs. 441-443). 
Agromyza nigrella (Rondani) 
(Figs. 380-384) 
Domomyza nigrella Rondani, 1875: 174. 
Agromyza nigrella , Spencer, 1966c: 288; 
1976a: 128; 1981: 117. 
Agromyza abbreviata Malloch, 1913a: 
285. Holotype male from New Mexico 
in USNM. 
Agromyza barberi Frick, 1952a: 372. 
New name for A. abbreviata Malloch 
(not Falldn, 1823a). NEW SYNONYM. 
Malloch (1913a) gave the wing length 
of A. abbreviata as 3.5 mm. This has 
led to confusion, as with this size 
the species could only be compared 
with A. kincaidi Malloch (1913a), 
which is in fact larger, although the 
wing length is given as 3 mm. 
Examination of the holotype of A. 
abbreviata shows the wing length to be 
2.6 mm. It agrees in all characters 
with A. nigrella , which was recently 
recorded in California (Spencer, 1981: 
117), and the male genitalia are also 
identical. A. abbreviata was renamed 
A. barberi Frick, as the name is 
preoccupied, and this species there- 
fore is synonymized with A. nigrella 
here. 
Agromyza pagana Spencer, new species 
(Figs. 414-416) 
Head. Frons 1.5 times width of eye, 
not projecting above eye in profile; 2 
reclinate ors, 2 inclined ori, orbital 
setulae short, reclinate; ocellar 
triangle scarcely extended beyond 
foremost ocellus; gena narrow in 
center, extended at rear, 0.25 height 
of eye; 3d antennal segment longer 
than broad, rounded below, slightly 
angular at upper corner (fig. 414). 
Mesonotum. Probably 3 differentiated 
dc but 3d missing, acr in some 8 rows. 
Wing. Length in male 2.4 mm, C 
extending to M 1+2, last section of 
M 3+4 0.67 penultimate, inner 
crossvein at center of discal cell. 
Color. Frons sooty black, ocellar 
triangle and orbits weakly shining; 3d 
antennal segment predominantly black, 
narrowly brownish on inner side, 1st 
and 2d segments also brownish; 
mesonotum shining black; legs with 
femora black, tibiae and tarsi 
brownish yellow; abdomen shining 
black; squama and fringe whitish 
yellow. 
Male genitalia. Aedeagus with distal 
tubules narrow but distinctively 
constricted near apex and then 
widening before narrowing again to 
junction with basal sclerites (figs. 
415, 416); surstylus with some 15 
short, stout bristles continuing to 
inner lower corner. 
Host/early stages. Unconfirmed but 
certainly Poaceae. 
Holotype m. , Kansas, Douglas Co., 
Natural History Reserve, Lawrence, 
28. IV. 56 (J. G. Chillcott ) , in CNC. 
Remarks. The shape of the third 
antennal segment is the most obvious 
distinguishing character of this 
species, which otherwise somewhat 
resembles A. parvicornis . The male 
genitalia are distinctive. 
Agromyza parca Spencer, new species 
(Figs. 424, 425) 
Head. Frons projecting above eye, 1.5 
265 
