No. 34.] HEMIPTERA OF CONNECTICUT! PSYLLIDAE. 247 



P. celtidis-gemma Riley. (PL vi, 5.) 



Proc. Biol. Soc. Wash., ii, 74, 1884 



Common on hackberry. 



East Wallingford, 6 July, 1904; New Haven, 25 June, 1905 (W. E. B.) ; 

 Branford, 5 June, 1908 (B. H. W.). 



P. venusta (Osten Sacken). Psylla venusta Osten Sacken. 

 Pachypsylla tridentata Patch. 



Stet. Ent. Zeit, xxii, 422, 1861. 



On hackberry. 



Galls, Branford, 5 June, 1908 (B. H. W.). 

 P. celtidis-mamma Riley. (PL vi, 4.) 



Proc. Biol. Soc. Wash., ii, 73, 1884. 



For detailed description see Stough (1910) and for discussion 

 see also Crawford (1914). Common on hackberry. 



Oxford, 21 May, 1904; Westville, 18 June, 1904, 7 Sept., 1905 (W. E. B.) ; 

 galls, New Haven, 5 June, 1903 (W. E. B.). 



P. celtidis-vesiculum Crawford. 



U. S. Nat. Mus., Bull. 85, 112, 1913. 



On hackberry. 



Galls, Westville, 7 Sept., 1905 (W. E. B.). 



Spanioneura Foerster. 

 S« fonscolombii Foerster. (Fig. 23.) 

 On boxwood (Buxus). 

 Pomfret, 29 May, 191 5. For further account see Britton (1916). 



Fig. 23. Wing of Spanioneura fonscolombii Foerster. Greatly enlarged. 

 Drawing by Dr. Edith M. Patch. 



Psylla Geoffroy. 



Key to Species. 



1. Antenna less than two and one-half times as long as width of head 2 

 Antenna at least two and one-half times as long as width of head 7 



2. Cauda of female with dorsal plate curving downward at tip 3 



Cauda of female with dorsal plate not curving downward at tip . . 4 



3„ Genital segment of female less than half as long as rest of abdomen 



pyricola 



