Notes on the Taro Leafhopper (Megamelus proserpina Kirk.) (Delphacidae).
Megamelus proserpina, Kirk., which was thought to have been eradicated in 1930, has reappeared in Hawaii and is doing considerable damage to taro [Colocasia]. As the infested area is apparently very restricted, eradication will again be attempted. Notes on the life-history are given from observations made in the Philippine Islands in 1931. The eggs are deposited principally in cavities hollowed in the stems. Each cavity usually contained two eggs. The egg and nymphal stages lasted 8-9 and 13 days, respectively. All the adults were short-winged, like those in Hawaii. The egg-tubes in the female were fully developed 3 days after the adult stage was reached. Males and females occurred in equal numbers; pairing is believed to take place at night. This Delphacid was not found on any plant other than taro. It was heavily parasitized by Paranagrus perforator, Gir., Ootetrastichus sp. and a Dryinid. When first observed in Hawaii, it was attacked by a Dryinid and the Capsid, Cyrtorhinus.