142 Psyche [December 



The wingless form was present in considerable numbers on the 

 surface of a spring halfway up the mountain. The common occur- 

 rence of several species of this genus in such isolated situations 

 indicates the importance in the economy of the race of the fully 

 winged phase, which, though very rare, must appear with sufficient 

 frequency to provide for a favorable rate of dispersal. 



Haystack Mountain,'^ Vermont, September 5, 1919. 



Pentatomidse. 

 Euschistns tristigmus (Say). 

 Podisiis modestus (Dallas). 



Neididse. 

 Neides muticus (Say). New to the Vermont list. 



Lygseidse. 

 Ligyrocoris contractus (Say). 



Reduviidse. 

 Sinea diadema (Fabricius) . 



Nabidse. 

 Nabis roseipennis Reuter. New to the Vermont list. 

 Nabis rufuscidus Reuter. 



Miridse. 

 Collaria meilleurii Provancher. 

 Phytocoris lasiomerns Reuter. 



Phytocoris eximius Reuter. Summit. New to the Vermont list. 

 Lygus vanduzeei Knight. Summit. 

 Lygus pabulinus (Lmne) . Summit. 

 Lygus fagi Knight. Halfway. 

 Lygus belfragei Reuter. Halfway. 



Woodford, Vermont, September 5, 1919. 



Tingidse. 

 Corythucha heidemanni Drake. New to the Vermont list. 



Specimens taken on alder closely agreeing with an example of 

 the species collected by Drake in the type locality. Drake has 

 reported birch as a food plant. 



* From near the base unless otherwise stated. 



