NOTES ON NORTH AMERICAN PSYLLID.E. BY C. V. RILEY (Read May 25, 1883.) Having been engaged lately in putting together the material for a study of the Psyllidse of North America, I would, in this brief paper, offer a preliminary statement of some of the results, and append a few descriptions of the more remarkable forms for pub lication in the proceedings. Knowledge of the European Psyllidae has greatly advanced, both as to morphology and biography, since the time of Linnaeus and Latreille, mainly through the labors of Hartig, Forster, Flor, and more especially, in recent years, through the important publi cations of Dr. Franz Low, of Vienna. The Psyllid fauna of the United States has, however, received little attention from American entomologists ; yet it is rich in species which are of great interest. What has hitherto been done in the classification of the North American Psyllidae may be gathered from the following list of the species actually described. A similar list was published in the " Canadian Entomologist " by Mr. Wm. H. Ashmead, (1881,) but it was somewhat incomplete, and contained some inaccuracies. j. Diraphia vernalis Fitch. 2. Diraphia femoralis Fitch. 3. Diraphia calamonim Fitch. 4. Diraphia maculipennis Fitch. 5. Aphalara arctica Walker. 6. Psylla ilecis Ashmead. 7. Psylla rlwis Glover. 8. Psylla quadrilineata Fitch. 9. Psylla carpini Fitch. 67
BioStor
