Cerodontha (Butomomyza)

Eiseman, Charles S. & Lonsdale, Owen, 2018, New state and host records for Agromyzidae (Diptera) in the United States, with the description of thirty new species, Zootaxa 4479 (1), pp. 1-156 : 40-41

Cerodontha (Butomomyza) sp. 1

( Fig. 23 )

Material examined. MASSACHUSETTS: Franklin Co., Northfield , 276 Old Wendell Rd. , 10.viii.2016, em. 22.viii.2016, C.S. Eiseman, ex Scirpus cyperinus , #CSE2931, CNC659963 (1♀) .

Host. Cyperaceae : Scirpus cyperinus (L.) Kunth.

Leaf mine. A yellowish, elongate blotch, typically occupying the space from the leaf margin to the midrib; frass in a few large, black lumps.

Puparium. ( Fig. 23 ) Whitish to yellowish, broader in the anterior half and tending to taper posteriorly; strongly segmented; most segments with a black, elliptical patch on the ventral surface, these patches usually uniting to form a continuous ventral band with lobed margins. The puparium is firmly glued within the mine, usually roughly perpendicular to the leaf venation; typically two or more puparia lie side by side.

Distribution. MA; we have also collected leaf mines in VT.

Comments. The host, mines, and puparia all seem to match Cerodontha scirpivora Spencer , described from Ontario ( Spencer 1969), but our single female keys to C. angulata . That species, however, forms a narrower, whitish mine, and its puparium is quite different, being compact and smooth (not deeply segmented), typically reddish-brown or darker, without black ventral markings, and either formed externally or loose within the mine, rather than firmly glued in place. Cerodontha (Butomomyza) sp. 1 is heavily parasitized in our experience; our three collections thus far have yielded 22 wasps ( Braconidae and Eulophidae ) and a single fly.

Figures

FIGURE 22–29. Figure 22: Cerodontha (Butomomyza) angulata (Loew), empty puparium. Figure 23: Cerodontha (Butomomyza) sp. 1., empty puparia (left one parasitized by a braconid wasp). Figure 24: C. (Dizygomyza) edithae spec. nov., adult male. Figures 25–26: C. (D.) feldmani spec. nov.; 25: adult male; 26: empty puparium. Figure 27: C. (D.) morosa (Meigen), empty puparium. Figure 28: C. (Poemyza) incisa (Meigen), puparium. Figure 29: C. (P.) inconspicua (Malloch), puparia.