\ ol. xxix] ENTOMOLOGICAL NEWS. 223 



Trioza Forster. 



T. aylmeriae Patch. — Alt. Vernon, Virginia. February 28, L. O. 

 Jackson; and March 21, 1915, ^cAtee. 



T, diospyri Ashmead. — Abundant on persimmon (Diopyros x'tr- 

 giniana) ; March 26 to August 14. 



T. obtusa Patch. — Washington, D. C, April 6 and 27, 1885; Mary- 

 land, February 22, 1884, A. Koebele ; Dead Run, Virginia, in 

 flowers of Amelanchier, April 23, 1916, L. O. Jackson. Cabinet 

 name, T. amelanchieris Riley. 



T. salicis Mally. — Common on willow from June to August, 

 though nymphs have been collected as late as October ; found on 

 pine foliage from November to April. 



T. tripunctata Fitch. — Probably the most abundant species of 

 Psyllid in this region. Plants of the genus Ritbiis are said to be 

 the true hosts, but it would seem hardly enough specimens are seen 

 upon Ruhus (May-July) to account for the great abundance of 

 the species on pine (October-June). 



Neotriozella Crawford. 

 N. immaculata Crawford. — \\'ashington, D. C, October, 1883, E. 

 A. Schwarz ; Mt. Rainier, Maryland, November 14, 1915, L. O. 

 Jackson; Eastern Branch, near Bennings, D. C, on Pinus vir- 

 giniana, December 30, 1915, McAtee. 



Hemitrioza Crawford. 



H. sonchi Crawford. — Washington, D. C, June 13, 19, 22, 26; 

 Virginia, October 9, 1881, E. A. Schwarz; Four-mile Run, Vir- 

 ginia, June 29, 1913, A. Wetmore. All of this material except last 

 lot, was used in connection with the original description of the 

 species (and genus). 



Pachypsylla Riley. 



P. celtidis-gemma Riley. — Common on hackberry, May 8 to June 7. 



P. celtidis-mamma Riley. — Not very common; found on hackberry 

 May 13 to August 15, and on red cedar (Juni[>crus z'irgitiiaiia) 

 and other conifers from October to February. Specimens labelled 

 P. c.-miunta seem, to be only small individuals of this species. 



P. venusta Osten Sacken. — Department of .A.griculture grounds, 

 Washington, D. C, September, 1892. Miss M. Sullivan. Originally 

 described from Washington, D. C. 



Psyllopsis Loew. 

 P. fraxinicola Forster. — Washington, D. C, May 18 to August 10, 

 Hubbard and Schwarz. 



Psylla Geofifroy. 

 P. annulata Fitch.— Beltsville. Maryland, May 28. 1910; August 14, 

 1914, McAtee. 



