Half hours with insects . natra. has been remarked by others, closely resembles a dead loaf,as it lies at the bottom of the pond in wait for its small a proportion of insects arc aquatic that thequestion arises whether those that do live in our ponds andstreams may not be the descendants of terrestrial ocean is the parent of all life ultimately, but only a 5 134 HALF HOUES WITH INSECTS. [Packard. very few insects live in salt water, and it is easy to see thata maritime life is not a normal one to them. So in a lessdegree with the fresh water forms. The aquatic insects arerepr
Half hours with insects . natra. has been remarked by others, closely resembles a dead loaf,as it lies at the bottom of the pond in wait for its small a proportion of insects arc aquatic that thequestion arises whether those that do live in our ponds andstreams may not be the descendants of terrestrial ocean is the parent of all life ultimately, but only a 5 134 HALF HOUES WITH INSECTS. [Packard. very few insects live in salt water, and it is easy to see thata maritime life is not a normal one to them. So in a lessdegree with the fresh water forms. The aquatic insects arerepresentatives of scattered families, and though all are invarious ways modified by their aquatic surroundings, 3-et somuch do they differ in their modes of development andstructure among themselves, that it is easy to see that theybelong mainly to terrestrial types which have adopted anaquatic life after the t3pe to Avhich they had belonged hadbecome fixedly terrestrial. For example, many beetles ¥lG. 94. Fia. 95. Fig.
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectinsects, bookyear1881
