Vol. xxi | I;XTOMOLOGICAL XK\\S 355 



marshy low grounds in fields and pastures this form is re- 

 placed almost entirely by pure colonies of the intermittent trill- 

 ing form. Only where the wet and dry conditions overlap is 

 there a noticeable intermingling of the two forms. At Oxford, 

 Mass., Nemobius fasciatiis var. vittatus is the most abundant 

 insect of late autumn, and continues to trill in the fields until 

 overcome by the keen, freezing nights of November. 



I find the tiny Nemobius palustris Blatchley fairly common 

 at Oxford, Mass., though far less so than the preceding. Ne- 

 inobius palustris is much more local in its distribution, prefer- 

 ring to conceal itself beneath the grass and leaves in cool, damp 

 spots by roadsides, and amidst the moss and leaves covering- 

 damp banks near brooks in thinly wooded situations. I have 

 never heard this cricket in open fields frequented by Nemobius 

 fasciatiis var. vittatus, nor in any locality which is not clamp or 

 wet, and provided with an abundance of leaves or dead grass 

 beneath which it can remain concealed. Its usual habitat is 

 beneath the matted grasses and leaves in cool, damp situations, 

 whether by roadsides, in fields or in woods. I not infrequently 

 find this cricket beneath flat, deep-sunken stones in damp soils. 

 Wherever found, its close association with damp or wet soils 

 is at once evident. At Oxford, Mass., this cricket dwells al- 

 most entirely beneath the matted grass in damp soils by road- 

 sides. In this region I have never observed it in true swamps 

 or boggy sphagnum marshes which seem to be its favorite 

 habitat in many other portions of its range, as stated by Blatch- 

 ley in Indiana. This cricket is not readily collected until first 

 located by its stridulations. 



At this season of the year the true arboreal katydids may 

 hardly be expected, since the woods are mostly leafless. How- 

 ever, on one or two occasions I heard the sharp, rasping tzeep 

 of some species in an apple tree, which had not entirely lost its 

 green leaves. 



With the coming of autumn, the number of musical Orthop- 

 tera rapidly decreases, and in particular situations, many forms 

 soon entirely disappear. These changes are largely brought 

 about by more or less profound changes in the accustomed en- 



