| OCR Text |
Show CHAPTER I INTRODUCTION Of 48 the The poorly known states the studied geographic presents of C. in has of have those significance. insect the However, research because of of groups public of the increased concern of of into the forests knowledge adverse and effects rangelands the of has This as emphasis mayflies of used increased biology Idaho much attention or on increased aquatic fauna. also dissertation of medical aquatic stream pollution and insecticides identification and knowledge been the economic with fresh water has a been Edmunds has F. mayflies greater recreational values 'of gaining has i.nvestigating The Ephemeroptera have not received as north studied the Ephemeroptera of study a G. of California. those Day results the western Unitd eleven states investigation. pioneering study the In areas. this the in remain rather to continue to and W. America, fauna has mayfly three Ut.ah" while R. K. Allen Oegon, the 9nly conducted the of where fauna of previous Ephemeroptera known from North are mayflies, however, in most of species reported per state varied from of number 126. to 2,000 species states those In Mexico. studied than more 600 species about world, of the of the the the urgency Investigations in spraying demand for Ephemeroptera. |
