difficult or impossible in this genus, and several species are noted f File:Corydalus_cornutus_5000010.jpg licensed with Cc-by-3.0-us 2009-11-02T12:00:58Z MPF...
DescriptionProtosialis americana PCCA20050708-9036A.jpg Alderfly, Protosialis americana species. Location: Durham, North Carolina, United States. Note:...
