Polydrosus

No true winged Polydrosus seems to have been described from Tropical America, and but two from the United States (P. americanus, Gyll., the type of Cyphomimus, and P. ochreus, Fall); two species, however, are known from Lower California. The eleven forms now added from within our limits are closely related to some of those inhabiting the Palæarctic region, P. longicornis, indeed, being a near ally of P. pterygomalis, Boh. The basally connate claws is perhaps the best character by which to distinguish Polydrosus from most of the allied genera, and the sharply defined, narrow scrobes separate it from Phyllobius. The antennæ are extremely slender in most of the forms here described; the femora are unarmed; and the scrobes vary in length according to the species, sometimes extending to the lower surface of the rostrum. These insects attack Quercus, Salix, Alnus, Corylus, &c., and many more species will doubtless be found to occur in the New World*. The Central-American forms may be tabulated thus:—* Two or three others are represented in our collection by worn examples only.