OF WASHINGTON. 195 this species was simply an ordinary cosmopolite and showed that a number of other mites which he especially mentioned are also practically cosmopolitan. Mr. Howard called attention to the fact that this clover mite is peculiarly adapted to a commercial distribution. It may and probably has been carried commercially on nursery stock all over the world, while from the habits of the adults in crawling great distances in search of hibernating quar ters it may be carried on anything coming from the household, or even upon the bodies of animals. Mr. Marlatt said that the occurrence of this insect upon cultivated trees and in households had only recently been recognized, and that its wide distribution was probably of very early occurrence. Mr. Schwarz stated that the occurrence of this Bryobia on very high mountains is very re markable. Mr. Hubbard and himself have found it during the month of June in the Wasatch Mountains of Utah, at an eleva tion of from 10,000 to 1 1 ,000 feet. The eggs occurred in such quantities under stones between the snow fields that they could be scraped up by quarts. The next paper, which was presented by Mr. Schwarz, was entitled : NOTE ON THE CEDRELA PSYLLIDS (GENUS FREYSUILA ALEMAN). By E. A. SCHWARZ. Many years ago, the late Dr. Eugene Duges, of Guanajuato, Mex., sent to the lamented Dr. C. V. Riley some badly pre served specimens of a remarkable Psyllid, with the statement that this insect was greatly injurious to Cedrela trees.* They were then considered as belonging to an undescribed genus and species. What appears to be the same species was sent some years later by Dr. A. Ernst, from Caracas, Venezuela, and by Mr. F. W. Urich, from the island of Trinidad, W. I., the species being in either case marked as being injurious to Cedrela trees. Finally, in 1896, Dr. Alfred Duges, of Guanajuato, Mex., forwarded ad ditional specimens to Dr. L. O. Howard, with the statement that this Psyllid had been described by Dr. J. Aleman, under the name of Frey-Suila dugesii. * Cedrela belongs to the family Sterculiaceae. The wood of C. odorata (and perhaps also of other species of the same genus) has of late years ac quired considerable economic importance, and it is stated that it is never attacked by any insect, not even the termites,
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