40 BIOLOGICAL SURVEY OF 



Chermes Liimaeus 



C. ABiETis Linn. Spruce gall aphid. Bar Harbor. Forms ! 



the 'pineapple gall' on spruce. ; 



C. STROBiLOBius Kaltcubach. The woolly larch gall. Salis- 

 bury Cove. 



CocciDAE. Scale insects j 



Lepidosaphes Shinier ] 



L. uLMi Linn. {Mytilas pis pomorum auct.). Oyster-shell 

 bark scale. Common, ash, mountain ash, and willow. 



Leucanium Burmeister 



L. QUERCiFEX Fitch. Oak scale. Bar Harbor and Salisbury l 



Cove on red oak. \ 



Order HEMIPTERA i 



CoRixiDAE. Water-boatman 



Arctocorisa Walleiigren 



A. coNocEPHALA Huiigf . S. W. Hai'bor, July 15. ; 



A. DECOROTELLA Huugf . S. W. Harbor, July 14-18. | 



A. iNTERRUPTA Say. Bar Harbor; Salisbury Cove, June 14- 



Aug. 10. 

 A. MAEROPALA Huiigf . S. W. Harbor, June 18. I 



A. NiTiDA var. minor Abbt. Salisbury Cove, July 18-Aug. 10. I 



A. SERIATA Abbt. Salisbury Cove, Aug. 11. 

 A. VULGARIS Hungf . Salisbury Cove, Aug. 10. | 



Belostomatidae. Giant water-bugs 

 Lethocerus Mayr 



L. AMERiCANus Leidy. Bar Harbor, July 29; small pond on j 



hill east of Salisbury Cove, Aug. 11, nymphs only. j 



Nepidae. Water-scorpions 



Eanatra Fabricius 



R. FuscA Pal.-Beauv. {americana Mont.). Bar Harbor, July 



29; small pond on hill east of Salisbury Cove, Aug. 11 | 



(nymphs). \ 



NOTONECTIDAE | 



NoTONECTA Linnaeus. Back-swimmers 



N. UNDULATA Say. Lily Pond, Bar Harbor, July 29; Salis- 

 bury Cove, Aug. 10. 



