THE MOUNT DESERT REGION 53 



Sympetrum Newman 



S. costiferum (Hagen). Bar Harbor, Aug. 18. Not as com- 

 mon as the above. 



S. danae (Sulzer). Great Duck Island, 1941 (Ahrens). 



S. internum Montgomery (DECisuH Hagen). A common 

 mid-summer form on ponds with good vegetation. Found on 

 the wet meadows. 



S. OBTRUSUM Hag. Narrows ; Witch Hole Pond, Aug. 13-18. 

 Feather Bed alt. 1000, Sept. 14. 



S. semicinctum (Say). New Mill Meadow, Aug. 20; Witch 

 Hole, Aug. 15-Sept. 5. 



S. vicinum (Hagen). Bar Harbor, Aug. 10. Sec. 28, Oct. 17. 

 A beautiful autumnal species. 



Leucorrhinia Brittinger 



L. frigida Hagen. Echo Lake; Witch Hole Pond, June 13- 



July 30. Common. 

 L. glacialis Hagen. Echo Lake; Beaver Dam; Witch Hole; 



New Mill Meadow, June 18-July 24. 

 L. hudsonica (Selys). Canada Brook, June 17; New Mill 



Meadow, June 18 ; Witch Hole, July 2 ; New Mill Pond, July 



2. 

 L. intacta (Hagen). Common from the first of June to 



August 1. 

 L. PRoxiMA Calvert. Witch Hole Pond; Bar Harbor; New 



Mill Pond ; Indian Point, June 11-July 24. 



Pantala Hagen 



P. flavescens (Fab.). A widely distributed species in small 

 numbers all summer. 



Order PLECOPTERA 



This family is of course collected along brooks. The same 

 brook should be visited at least every ten days during the 

 season so that the hatches of the different genera may be 

 collected. 



