Agromyza deserta

Euhexomyza albicula

Melanagromyza virginiensis

Ophiomyia abutilivora

Ophiomyia tiliae

ex twig swelling gall *Celtis occidentalis*

ex gall on *Salix* sp.
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*Euhexomyza albicula* (Spencer) stat. reinst., comb. nov. was included as a junior synonym of *[Hexomyza] winnemanae* by Spencer and Steyskal (1986b), but following examination of the types of both species, both are recognised here as distinct, and the former is resurrected from synonymy. Aside from having white wings and a similar body size, the two species are strikingly dissimilar.

Glencarlyn, [Virginia], 21.viii.1929, emg., “8-9.29”, *Rudbeckia* gall, J.C. Bridwell (1♂, USNM),...
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While the host species is not mentioned on any of the specimen labels, the male collected by Plakidas was reared from *Rudbeckia laciniata* (Plakidas 1982). It is interesting that this *Melanagromyza* atypically induces a gall, as apparent from both Plakidas’ specimen and the reared specimen from Virginia.

Glencarlyn, [Virginia], 21.viii.1929, emg., “8-9.29”, *Rudbeckia* gall, J.C. Bridwell (1♂, USNM),...
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While the host species is not mentioned on any of the specimen labels, the male collected by Plakidas was reared from *Rudbeckia laciniata* (Plakidas 1982). It is interesting that this *Melanagromyza* atypically induces a gall, as apparent from both Plakidas’ specimen and the reared specimen from Virginia.
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[note: In Plakidas' paper (1982), these flies are identified as *Melanagromyza matricarioides*, were reared from larvae found in "plant tissue adjacent to the gall cells" (vs. from the gall cells themselves), and were assumed to not be the gall-maker. *Asphondylia helianthiglobulus* was assumed to be the gall inducer based on gall morphology and host identity. Lonsdale (2021) re-examined one specimen from this 1982 collection and identified it as *M. virginiensis*. I disagree with Lonsdale that this and the Bridwell record are evidence that the agromyzid is itself inducing a gall; it seems likelier to me that it is an inquiline or merely develops from adjacent tissue.]

Hosts. Malvaceae – *Abutilon theophrasti*, *A. permolle*.
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ex. stem gall *Abutilion theophrasti*

Hosts. Malvaceae – *Abutilon theophrasti*, *A. permolle*.
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ex. stem gall *Abutilon theophrasti*
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[note: some rearing records listed here say "stem gall", but in Charley Eiseman's handbook of leafminers (2nd Ed., 2021), he shows images of this species reaching the pupa stage without inducing a gall, instead merely raising a tiny welt at the site of its puparium within its stem mine.]

Host. Malvaceae – *Tilia americana*, *Tilia* sp.
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[within records listed:] Host *Tilia americana*, feeding gall at base of petiole

Manual of North American Agromyzidae (Diptera, Schizophora), with revision of the fauna of the “Delmarva” states