Trionymus rostellum Lobdell in Hawaii (Homoptera: Pseudococcidae)

Trionymus rostellum Lobdell in Hawaii (Homoptera: Pseudococcidae)
John W. Beardsley

The common grass-infesting species of Trionymus found in the Hawaiian Islands has gone for many years under the name of T. insularis Ehrhorn. Recently, a second species, T. rostellum Lobdell, was found to be widespread on Oahu. The presence of T. rostellum in the Territory was first discovered when it was found infesting a grass, Zoisia sp., in the quarantine greenhouse of the Territorial Board of Agriculture and Forestry in Honolulu during March, 1955. Specimens from this source were identified by Dr. Harold Morrison, and it was at first thought that the mealybugs might have been present on the grass when it arrived in Honolulu from Maryland. However, it now appears probable that the infestation originated here.

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