!>(» BIOLOGICAL si'i;\KV OF 



Lac( hi i k \ Van Duzee 



L. vittipennis Van 1).:' S. W. Harbor, Aug. 20. Robinson 

 Mt. beating, Aug. 24. All females. Males needed for specific 

 determination. 



Stobaeb \ StSl 



S. tbicabinata (Say). Salisbury Cove, July 25. 



Liburniella Crawford 



L. obnata (tttal). Eden, July 15. Widely distributed. 



Delphacodes Fieber 



D. pellfcida (Fab.). Station F395. 

 D. puella (Van D.). Salisbury Cove, July 25. 

 D. campestris (Van D.). Bar Harbor, May 20. 

 D. sp. Great Heath, Oct. 5 (Br.). 



PSYLLIDAE 



Occur on the stems of plants and may be usually found by 

 the noticeable flocculent wax secretion or by examining de- 

 formed parts and galls. 



Livia Latreille 



L. vernalis Fitch. Seal Cove, Sept. 8. 



L. maculipennis (Fitch). S. \V. Harbor, Aug-. 20. The 

 nymphs develop in a gall formed on rush (J uncus). 



Aphalara Forster 



A. \ kaziei Patch. "Mt. Desert," July 30 (McAtee). 



Trioza Forster 



T. TKiprxciAiA (Fitch). Common at the foot of Western Mt., 

 July to Sept. The nymphs are gregarious on the under side 

 of the terminal leaves of the blackberry, causing them to 

 curl and form rosette-like bunches. 



T. obtusa Patch. Mt. Desert (Br.), June 12. 



