Occasional Papers of the Miiseiiiii of Zoology 7 



about ten feet below the stirface of the pond, and the whole 

 bog was tuiderlaid by a bed of peat some fifteen feet thick. 

 The water was quite brown from hjng-continued leaching of 

 organic matter. In several places there were small beds of 

 water lilies, and in most of the pond there was a sparse growth 

 of a species of Potamogeton, together with some Naias. Algae 

 were rather plentiful. 



Immature forms of Diptera and Odonata were common, as 

 Avere also Hemiptera and Dytiscidae. The aquatic insects at 

 this station were parasitized by red mites to a much greater 

 degree than at any other station in the region. 



Station X was the upper portion of Carp Creek, a small 

 rapid stream fed by subterranean water coming to the surface 

 in a number of springs abotit three-quarters of a mile south of 

 Douglas Lake. The stream was heavily shaded, but what light 

 was available penetrated to the bottom through tiie clear watei 

 of the creek. The bottom was sand, with only a very smalj 

 amount of debris; and, except for occasional beds of Chara, 

 the vegetation was confined almost entirely to the margins of 

 the stream. As might be expected, there was a marked ab- 

 sence of predaceotis animal forms, some surface-feeding 

 Hemiptera being the exceptions. The immature forms of may- 

 flies, caddis-flies, and black flies {Simiiliiiin z'enitstiiin) were 

 abundant. 



Station XI was Lancaster Lake, a small body of water about 

 a mile north of Douglas Lake, previously mentioned as the 

 source of Ilessey Creek. Collecting was done here in the 

 marshy areas along the north and west shores. x\mong the 

 rushes, reeds, and cat-tails there were occasional exposed marly 

 flats and small pools of turbid standing water which received 

 an abundance of light. Tadpoles, fish, amphipods, various in- 

 _sect larvae. Hemiptera. and water beetles were observed here. 



