A number of new species. either entirely new or known only from Mexico or Central America, have been brought back by me from the lower Rio Grande. The description of these new species, together with a list of the species known to occur in that region, will be published by me in the Bulletin of the Museum of the Brooklyn Inst. of Arts and Sciences. The two following species are here described in advance, in order that they may be included in the revision of the Ptinidæ on which Prof. Fall is at work.