Calycomyza eupatorivora Spencer

(Fig. 106)

Material examined. FLORIDA: Miami–Dade Co., Homestead, Avocado Drive., 31.iii.2013, em. ~ 27.iv.2013, C.S. Eiseman, ex Chromolaena odorata, #CSE352, CNC 392678 (1♂).

Host. Asteraceae: Chromolaena odorata (L.) R.M. King & H. Rob.

Leaf mine. (Fig. 106) Initially linear, gradually expanding into a whitish, upper surface blotch, which in some cases becomes somewhat blistered. As the track widens, a brown central frass deposit becomes evident, widening along with the mine. As many as four mines were observed in a single leaf, sometimes coalescing. In all the examples observed, the mines began near the base of the leaf and so had ample room to expand into a trumpet shape, without doubling back to the extent that the linear portion was obliterated.

Puparium. Brown; formed outside the mine.

Distribution. USA: FL; Jamaica (Spencer & Stegmaier 1973).

Comments. This species was first recorded in the USA by Diaz et al. (2015), and it was the only agromyzid they encountered on Chromolaena odorata during their three-year study of arthropods on this host in Florida. Two other Calycomyza species known to occur in the USA are recorded from Chromolaena odorata, but both of these records are questionable. Spencer & Steyskal (1986) list Calycomyza jucunda (Wulp) under “ Eupatorium odoratum L.” despite stating elsewhere that its host is unknown and that the Asteraceae-feeder previously identified as C. jucunda is actually C. platyptera (Thomson) . We have found nothing else in the literature to suggest that C. platyptera has been reared from Chromolaena, but its mines would be distinguishable by having the puparium formed inside. Spencer (1990) stated that the known hosts of Calycomyza artemisiae (Kaltenbach) in the USA include “ Eupatorium odoratum,” but again we have found no evidence for this in prior literature, and the known distribution of C. artemisiae does not overlap with that of Chromolaena odorata .