THE MOUNT DESERT REGION" 61 



Belostomatidae. The Giant Water-Bugs 

 Lethocerus Mayr 



L. AMERiCANus (Leidv). This species is in all of the swampy 

 ponds on the Island to a limited extent. They may be taken 

 in a minnow trap. Nymphs and adults appear at the same 

 times. 



Gerridae. The Water-striders 



Gerris Fabricius 



G. ARGENTicoLLis Parsh. 'Mt. Desert,' July 28 (McAtee). 



G. BUENoi Kirk. Salisbury Cove ; Bar Harbor, Aug. 10, 11. 



G. MARGiNATUs Say, Ice pond, Manset; S. W. Harbor, June 

 18-July 13. Common. 



G. REMiGis Say. Duck Brook ; Bar Harbor ; Manset, June 11- 

 Aug. 18. Common. 



G. (limnoporus) rufoscutellatus Latr. Bar Harbor, Salis- 

 bury Cove, June 14-July 18. 



Trepobates Uhler 



T. piCTus H.-Sch. Ice pond, Manset, June 18. It is a pond 

 dweller and is generally taken wingless. 



Veliidae 



Rhagovelia Mayr 



R. obesa Uhler. Duck Brook ; Outlet of Ripple Pond, Aug. 18. 

 Lives on the swift water of brooks. 



Reduviidae 



RBnJUVius Fabricius 



R. PERSONATus (Limi.). The Kissing Bug or Masked Bed-bug 

 Hunter which as a n\Tiiph covers itself with lint and dust in 

 houses and thus disguised destroys its unsavory fellow. One 

 specimen taken at Corfield, July 6, '31. 



