Zoological Explorations. 291 



Order ORTHOPTERA. 

 Family acridiid.e. 



Melanoplus bivittatus Say. A single specimen of this 

 common insect was brought from Grand Rapids, N. W. T. 

 The determination is due to Mr. Lawrence Bruner, of Lin- 

 coln, Nebraska. 



Class ARACHNIDA. 



Order ARANE^E. 



Family epeirid.e. 



Epeira patagiata Clerck. One example, male. 



Epeira strix Hentz. Several specimens, mostly females. 



Epeira trivittata Keys. One example, female. 



Tetragxatha laboriosa Hentz. Three young speci- 

 mens are doubtfully referred here. 



Family attid.e. 



Phil^us militaris Hentz. Several specimens, male, 

 female and young. 



Order ACARINA. 



Family trombidiid^e. 



A single specimen is referred here by Mr. Nathan Banks 

 who has kindly furnished names of all the Arachnids. 



Class CRUSTACEA. 



Family astacid.e. 



Cambarus sp. Several specimens of a Cray-Fish were 

 obtained at Grand Rapids. 



Family limniadiad^e. 



Estheria sp. Three pairs of the bivalve shells were 

 obtained at Grand Rapids. 



