Kaltenbach is publishing a work entitled Die Pflanzen-Feindeaus der Classe der Insecten, two parts of which have appeared and carry the investigation through the willows. He enumerates all the German insects known to feed upon particular plants ; annotated lists of more than three hundred species of insects are sometimes ascribed to a single tree.

In many respects the Catocalas are among the most interesting of the moths. The contrast of color between their fore and hind wings renders them objects of great beauty, and hence these fair forms of the woods are eagerly sought after by collectors. My spare time this season was spent in collecting Catocalas. In this part of the country they may be found from the first of June till the first of November.Amasia and ultronia are seen first; I took a fine amasia on the 29th of May, and an ultronia on the 10th of June, cara and several other species may be found as late as the first of November.

There has been some coufusion lately in regard to the limits and synonymy of these two common species, partially due to Dr. Harris' unsatisfactory reference to them in his “Report on the Insects of Massachusetts.” 1841. and to the inaccessibility of Prof. Peck's original descripticn of A. vernata.

In the numerous notes on these species and references to them in recent publications, they are in nearly allcases confounded together or wrongly determined; and I have not found them correctly named in a single collection which I have examined.

The Swallow-tai1 Butterflies which occur on the Islands of Anticosti and Newfoundland, and on the north coast of the Gulf of St. Lawrence are at present a subject of dispute, both as to species and position among the Papilionidæ. Having some knowledge of their localities and geographical range, I venture to state my opinion on the matter.