Taxonomic notes on Nordlandiella diaz and Ganaspidium weld (Hymenoptera: Figitidae: Eucoilinae)

Nordlandiella semirufa (Kieffer), n. comb., is described and figured. This represents the second species of Nordlandiella Diaz, and extends the distribution of this genus into Mexico, Arizona, Hawaii, Texas, Nicaragua, Belize, and Chile. Nordlandiella semirufa is reported here as a parasitoid of Melanagromyza sp. (Diptera: Agromyzidae), feeding in flower heads of Bidens spp. (Asteraceae) in Hawaii. The genus Ganaspidium Weld is reviewed; Ganaspidium utilis Beardsley is a new synonym of Ganaspidium nigrimanus (Kieffer), n. comb. Nordlanderia merickeli Miller and Nordlanderia navajoe Miller are recognized as nomina dubia. All known species of Ganaspidium and Nordlandiella are parasitoids of Agromyzidae (Diptera).