Calycomyza enceliae Spencer

(Figs. 8, 9, 38)

Material examined. ARIZONA: Pima Co., Coronado National Forest, Redington Rd., 4.iii.2017, em. 24.iii.2017, C.S. Eiseman, ex Encelia farinosa, #CSE3291, CNC940432–940434 (1³ 2♀) .

Hosts. Asteraceae: Encelia californica Nutt. (adults common on this host but no mines found (Spencer 1981; Spencer & Steyskal 1986)), E. farinosa A. Gray ex Torr., Helianthus annuus L. (Gates et al. 2002).

Leaf mine. (Fig. 38) The mines from which we reared this species on Encelia farinosa were pale green without evident frass; vacated mines became brownish with a narrow whitish margin. They were initially linear, gradually widening to a blotch that later partly or mostly obliterated the linear portion. The larva exited through a crescentshaped slit in the upper epidermis. Gates et al. (2002) classified the mine on E. farinosa as “upper surface serpentine/blotch,” in agreement with our observations, but characterized the mine on Helianthus annuus as “upper surface serpentine.”

Puparium. (Fig. 9) Brown; formed outside the mine.

Distribution. USA: * AZ, CA.