SUBFAMILY CRYPTORHYNCHINAE KEY 'I'O 'fHE GUAM GENERA 1. Scutellum visible; metepisternum distinct throughout its length.................... 2 Scutellum hidden; metepisternum partially or entirely hidden, never distinctly visible and broadly exposed throughout its length................................ 6 2(1). Pectoral canal without any side walls, ending in the metasternum, mesosternal receptacle open or nearly so and densely squamose................ Deretiosus. Pectoral canal ending in the mesosternum or prosternum, the mesosternal (or prosternal) receptacle usually distinctly cavernous and with distinct elevated side walls............................................................................................................ 3 3(2). Femora armed with a small or large tooth below................................................ 4 Femoraedentate........................... 4(3). Pectoral canal ending in the prosternum, densely squamose throughout; prosternal receptacle with the high side walls contiguous to the coxae; eyes closely approximated below...................................................................... Camptorhinus. Pectoral canal ending in the mesosternum, not squamose between the coxae; eyes very widely separated below.......................................................................... Oreda. 5(3). Metasternum between the mid and hind coxae about twice as long as the breadth of a mesocoxa; femora not grooved for the reception of the tibiae; dorsum with fascicles and spongy scaling; body subparallelsided..................................................................................................................Menectetorus. Metasternum between the mid and hind coxae not as long as the breadth of a mesocoxa; femora shallowly grooved for the reception of the tibiae; dorsal scaling smooth, not at all fasciculate or spongy; body subrhomboidal TODO 6(1). Femora minutely or distinctly toothed (examine fore pair carefully); pectoral canal in part or entirely squamose......................................................... 7 Femora edentate; pectoral canal bare.......................................................................... 8 7(6). Form subquadrate; pectoral canal squamose throughout; mesocoxae separated by the breadth of a coxa; metasternum shorter between mid and hind coxae than the breadth of the base of the femora.......................... Anaballus. Form elongate; pectoral canal squamose only in front of the coxae; mesocoxae separated by only about half the breadth of a coxa; metasternum longer between the mid and hind coxae than the base of the femora.... Euscepes. 8(6). Pectoral canal terminating between the fore and mid coxae, always before? the mesocoxae.......................................................................................................... Acalles. Pectoral canal terminating between the mesocoxae, distinctly behind their foremargins............................... 9(8). Dorsum conspicuously multituberculate.............................................................. Daealus. Dorsum not tuberculate; minute species, Guam species less than 2 mm. long ....................................................................................................Microcryptorhynchus.

Published as part of Zimmerman, Elwood C., 1942, Curculionidae of Guam, pp. 73-146 in Insects of Guam I, Honolulu, Hawaii :Bernice P. Bishop Museum on page 101, DOI: 10.5281/zenodo.5159964