Genus OXYDEMA Wollaston

0xydema Wollaston, Ent. Soc. London, Trans., 487-488, 1873.

Pseudo/us Sharp, Roy. Dublin Soc., Trans. II, 3: 190, 1885. Synonym by Zimmerman, B. P. Bishop Mus., 0cc. Papers 15 (25): 286, 1940.

This genus includes seven species which, with the exception of the widespread 0. fusifonne, are all confined to the Pacific from Sumatra eastward. Champion (Linn. Soc. London, Trans. II, 16: 484, 1914) says that 0. elongatuni Pascoe (Mus. civ. nat. stor. Genova, Ann. II, 2: 321, 1885) may be a synonym of 0. fusifonne Wollaston .

KEY 'l'0 'l'HE SPECIES m· OxYDEMA oF GuAM

1. Elytral striae deeply, coarsely, and conspicuously grooved from base to apex throughout; intervals with small but comparatively coarse and conspicuous punctures, transversely sculptured and not appearing smooth............................... TODO TODO TODO TODO

2. Elytralstriaenotorbutshallowlyimpressedbetweenthepuncturesonthedisk, never conspicuously and deeply grooved throughout; intervals with microscopic punctures only and appearing smooth and polished................................... TODO TODO TODO TODO