FIGURES 258–263. Female postabdomens. 258–259 in Key to Adults of North American Genera of the Subfamily Cecidomyiinae (Diptera: Cecidomyiidae)

FIGURES 258–263. Female postabdomens. 258–259, Ribesia sarae Gagné, 6th segment to cerci (dorsal and ventral, respectively) and detail of fused cerci (lateral). 260, Craneiobia corni (Giraud), fused cerci and hypoproct (dorsal). 261, Strobilotia carpophaga (Tripp), 7th segment to cerci (dorsolatral). 262, Cupressatia siskiyou (Felt), 6th segment to cerci (dorsal, vestiture of fused cerci not shown). 263, Helianthecis capitum Gagné, 6th segment to end (vestiture not shown) with detail of cerci and hypoproct (dorsolateral).