Two species of Anthonominae were procured on Guam. Each is new and belongs to a different genus. The genera, one of which is new, may be distinguished by the following synoptic table:

1 Scrobes straight and lateral throughout, not at all oblique near the antennae prosternum entire and not canaliculate before the coxae................................ Usingerius.

2. Scrobes passing rapidly and obliquely downward to the venter of the rostrum, ventral in the posterior half; prosternum broadly canaliculate before the coxae........ TODO