26 BIOLOGICAL SURVEY OF 



Tetragoneuria Hagen 



T. CYNOSURA siMULANs Muttk. Eclio Lake, July 12. 



LiBELLULA Linuaeus 



L. EXUSTA Say. Witch Hole Pond ; Long Pond, June 13-26. 

 L. QUADRiMACULATA Lluu. Common, June 8-July 11. 

 L. SEMIFASCIATA Buim. Bar Harbor, June 15. 



Plathemis Hagen 



P. LYDiA Drury. Bar Harbor, June 11-July 20. 



Nannothemis Brauer 



N. BELLA Uliler. Witch Hole Pond, June 13. 



Sympetrum Newman 



S. RUBicuNDULUM Say. Common; Echo Lake; Bar Harbor; 



Tremont, Aug. 9-23. 

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

 S. cosTiFERUM Hag. Bar Harbor, Aug. 18. 

 S. viciNUM Hag. Bar Harbor, Aug. 10. 



Leucorrhinia Brittinger 



L. INTACTA Hag. Common, June 8-July 21. 



L. GLACiALis Hag. Echo Lake ; Beaver Dam Pond, July 12-24. 



L. FRiGiDA Hag. Echo Lake; Witch Hole Pond, June 13- 

 July 30. 



L. PROXiMA Calv. Witch Hole Pond; Bar Harbor, June 11- 

 July 24. 



Celithemis Hagen 



C. ELiSA Hag. Witch Hole Pond, Aug. 18. 

 Order MEGALOPTERA 



SlALIDAE 

 SiALis Latreille 



S. iNFUMATA Newn. Duck Brook; Echo Lake; Long Pond, 

 June 13-20. 



Chauliodes Latreille 



C. FASCiATus Walk. Sieur de Monts Spring, Bar Harbor, 



June 21. 

 C. SERRicoRNis Say. Bar Harbor; Jordan Pond; Echo Lake, 



June 8-17. 



