First Record of Gonatocerus triguttatus (Hymenoptera: Mymaridae) from Eggs of Homalodisca coagulata (Homoptera: Cicadellidae) with Notes on the Distribution of the Host

A survey of egg parasitoids of the glassy-winged sharpshooter, Homalodisca coagulata (Say), was conducted in Tamaulipas, Mexico and Texas, USA in April 1999. The mymarid Gonatocerus triguttatus Girault was reared from egg masses of this leafhopper on citrus and peach in northern Tamaulipas. This discovery is the first known host record of G. triguttatus; its other, probable, host associations are indicated. This wasp, whose geographical distribution also includes the eastern Rio Grande basin in Texas and the states of Baja California Sur and Nuevo Leon, Mexico, is identified as a potential biological control agent for introduction into California against H. coagulata.