346 THE RIVER-SIDE NATURALIST. 



all, are probably the sub-imago and imago state of Cloeon 

 dimidiatum. 



The August Dun, the sub-imago of Baetis autumnalis ; 

 the imago a claret Spinner. 



The Iron Blue is the sub-imago of the male of Baetis 

 niger of Linnaeus and other authors ; the imago being the 

 Jenny Spinner, the female imago having an orange body, 

 with light-hyaline wings. 



The little Yellow May Dun of Ronalds may be Baetis 

 longicauda (Stephens). 



