hibited in the specimen represented flying in the Plate. Like 

 Velia and Gem's, to which our insect is closely allied, it is at 

 present impossible to say whether the apterous specimens 

 are pupae or distinct species (from a difference in the colour 

 of their legs, I am inclined to favour the latter opmion); but 

 as far as regards the female figured, it appears extremely pro- 

 bable that winged specimens of the other sex would be found 

 if sought for at the proper time of the year, as it generally oc- 

 curs amongst insects, that the males have the advantage of 

 wings where the females are apterous. 



A male is represented walking at the base of the plant Scro- 

 phularia aquatica (Water Figwort) : that flying is a female. 



