No. 34«] HEMIPTERA OF CONNECTICUT: PSYLLIDAE. 249 



P. buxi (Linnaeus). 



Syst. Nat, Edn. 10, i, 454, 1758. 



Nymphal stages passed on boxwood (Buxus). 



Pomfret, 29 May, 1915. For further account see Britton (1916). 

 P. striata Patch. (Fig. 24.) 



Me. Agr. Expt. Sta., Bull. 187, 191 1. 



Nymphal stages passed on birch (Betula). 



New Haven, 10 June, 1910 (B. H. W.) ; Colebrook, 21 July, 1905 

 (H. L. V.). 



P. annulata Fitch. 



Homop. N. Y. St. Cab., 64, 1851. 



Nymphal stages passed on maple. Similar to P. negundinis but 

 readily distinguished by ringed antenna and the fact that it seems 

 to be restricted to maple. Nymphs abundant on maple (Acer 

 saccharum). 



Middletown, 17-31, May, 191 1. Nymphs usually but not always on 

 ventral side of leaf which they resemble closely in color. Adults collected 

 May 30-31 and by middle of June were found alighting on other vegetation 

 (W. C. W.). 



P. negundinis Mally. 



Proc. la. Acad. Sci., ii, 155, 1894. 



Nymphal stages passed on box elder (Negundo). 

 P. cerasi Patch. 



Me. Agr. Expt. Sta., Bull. 202, 1912. 



Nymphal stages passed on bird cherry (Prunus pennsylvanica) 

 occurring in flocculent masses on ventral surface of leaf. Adults 

 pale early in the season but richly colored in fall. Eggs are laid 

 in September between leaf bud and twig. 

 P. galeaformis Patch. 



Me. Agr. Expt. Sta., Bull. 187, 191 1. 



Nymphal stages passed on alder (Alnus). The genital seg- 

 ments of both sexes readily distinguish the adults from floccosa. 



Middletown, 13 June, 191 1, on Alnus incana (W. C. W.). 

 P. carpinicola Crawford. Psylla carpini Fitch. 



U. S. Nat. Mus., Bull. 85, 151, 19H- 



Resembles striata but with longer genal cones and wings less 

 flavous. 

 P. floccosa Patch. 



Can. Ent, xli, 301, 1909. 



Nymphal stages passed on leaf and new growth twig of alder 

 (Alnus). Wax filaments of nymphs very soft and plumelike in 

 appearance. 



Hamden, 17 June, 1904; Putnam, 12 July, 1905 (H. L. V.) ; Windsor, 

 19 June, 1905 (W. E. B.) ; Middletown, 13 June, 191 1 (W. C. W.). 



