Both these genera are common <lb xmlns="http://www.tei-c.org/ns/1.0" />to <add xmlns="http://www.tei-c.org/ns/1.0" place="superlinear">the middle of</add> <placeName xmlns="http://www.tei-c.org/ns/1.0" ref="https://edition-humboldt.de/H0005696 https://www.geonames.org/6255148">Europe</placeName> & <placeName xmlns="http://www.tei-c.org/ns/1.0" ref="https://edition-humboldt.de/H0001698 https://www.geonames.org/7729890">North america</placeName>. They <subst xmlns="http://www.tei-c.org/ns/1.0"> <del rendition="#s">are</del> <add place="intralinear">usually occur</add> </subst> in <lb xmlns="http://www.tei-c.org/ns/1.0" />Subalpine districts, <choice xmlns="http://www.tei-c.org/ns/1.0"> <abbr>i. e.</abbr> <expan>id est</expan> </choice> about <measure xmlns="http://www.tei-c.org/ns/1.0" quantity="100" unit="toise">100</measure>, or <measure xmlns="http://www.tei-c.org/ns/1.0" quantity="150" unit="toise">150 <choice> <abbr>hexap.</abbr> <expan>hexapodes</expan> </choice></measure> above the <lb xmlns="http://www.tei-c.org/ns/1.0" />sea.