12. Plinachtus acicularis (Fabricius) .

Alydus acicularis Fabricius, Syst. Rhyng., 251, 1803.

Two specimens were kindly forwarded from the U. S. National Museum by H. G. Barber who made the identification. Collected on Guam, Oct. 17, 1938, R. G. Oakley (1247) on Gymnosporia thompsonii . These specimens agree perfectly with Distant's description and figures of specimens from India. The genus has not been recorded from Oceania except for P. bellus Stal in Fiji. Species are before me from Mangareva and from the Austral and Society Islands. These lack the acute spines on the humeri as does bellus, in contrast to the acutely spined Oriental acicularis of Guam.