ENTOMOSTRACA AND LIFE ZONES. 



93 



TABLE I. 



SHOWS ZONAL DISTRIBUTION AND GENERAL RANGE OF EACH SPECIES RECORDED 



FROM COLORADO. 



f 



Zones occupied in Colorado, as indicated by local collections, are designated 

 in the upper line : LA, UA, T, etc. The probable distribution among the life 

 zones throughout the continent of North America is indicated in the lower 

 line: la, ua, t, etc. The Tropical Zone is omitted because of difficulty of deter- 

 mining with certainty which species enter it. A brief statement of general 

 range is given in the last column. Records in parenthesis are for species not 

 in my collections. 



