Occasional Papers of the Miiscuiii of Zoology 35 



Gerris buenoi Kirk. Apparently the least common Gerris 

 in this region. Several specimens were taken from a pool in 

 the Warren Woods, June zt,, and a few were found at New 

 Buffalo, June 30 and September 3. 



Gerris argenticollis Parsh. The most abundant Gerris in the 

 Warren Woods, with the possible exception of G. remigis. 

 The present species occurred abundantly on all the woodland 

 pools as well as on the quiet stretches of the Galien River in 

 the woods. 



Gerris ritfosc'itelJotiis Latr. Very common in several places 

 in this region. Specimens were taken at New Buffalo, in the 

 Warren Woods, and in the dune region; and this species 

 occurred rather frequently in the beach drift. 



Metrobates hesperius Uhler. Common in the Warren 

 Woods, where it occured on the Galien River, June 20 to 

 August 31. 



Rhcumatobates rilcyi Bergr. Common on the Galien River 

 and also on the woodland pools in the Warren Woods. The 

 specimens taken here were of the darker variety typical of 

 more northern latitudes. 



Veliadae 



Microvelia americana Uhler. Very common on the damp 

 sand beside the Galien River, at the margins of the small 

 brooks in the Warren Woods, and beside the creeks in the 

 dune region. 



Microvelia borealis Bueno. Rather uncommon among the 

 bulrushes in the New Buffalo marsh in June, but exceedingly 

 numerous there early in September. This species was not 

 taken elsewhere in Berrien County. 



Microvelia fontinalis Bueno. One specimen was taken at 

 New Buffalo, June 30. 



