Occasional Papers of the Museum of Zoology 39 



probably came from the marshy lakes near Stevensville. The 

 Berrien County specimens vary greatly in size, ranging from 

 45 to 63 mm. in length, and from 17 to 24 mm. in maximum 

 width. 



Lcthocerus sp. Apparently much less abundant than Bena- 

 cus. One individual was found in a small pasture pool near 

 the Warren Woods, July 3, and I took two specimens in the 

 beach drift on the Sawyer Dunes in mid July. I prefer not 

 to name this (or these?) species at present. 



Belostoma Unmineum Say. Numerous individuals were 

 found on the beach, and a few were taken from the Bald Tom 

 Pond and from various pools about the Warren Woods. 



Gelastocoridae 

 Gelastocoris n. sp. Abundant on the sandy margins of the 

 New Bufifalo marsh, on the banks of the Galien River in the 

 Warren Woods, and about the Bald Tom Pond. Specimens 

 were taken from June 20 to September 3; one individual was 

 found in beach drift, July 19. 



CORIXID.\E 



Palmacorixa giUettci Abb. Abundant in the Galien River 

 in June and in September, occurring in the shallow water, 

 where they rested on the muddy bottom and darted quickly 

 away if disturbed. 



Cori.va vcrticalis (Fieb.). Found with the preceding, in 

 early September, and likewise very common. The superficial 

 resemblance between these two fonns is very striking. 



Several other species of Corixidae were collected in Berrien 

 County, which had best be left unnamed at present. 



