THE INSECTS. 345 



autumn months, is the sub-imago of Cloeon hyalanilum or 



BAETIS FLUMINUM. 

 i, Sub-Imago. 3, Female Sub-Imago. 



BAETIS FLUMINUM. 

 2. Imago. 



Ochraceum (Stephens) ; Centroptilum luteola (Eaton) ; the 

 imago being a pale-coloured Spinner with a dark throat. 



\ I 



BAETIS LATERALIS. 

 i, Male. 2, P'emale Sub-Imago. 



The Quill Gnats (grey and red), which are not gnats at 



