Fly with a yellow egg sack question

[10November]

I was on Fishing Creek near Orangeville, PA on April 15th in the morning. A good hatch occurred of mayflies. They were a darker brown color with darker shaded brown wings and in the size range of 12 to 14s. All of the flies had a bright yellow egg sack hanging off their rear under the tail. (I assume it was an egg sack). I did not have a camera with me so I have no photos. Does anyone know which type of mayfly would have a bright yellow egg sack? They were not caddis since they did not have laid back wings when on the water. I am going to tie some up with the colors I saw and a bright yellow ball under the tail and want to know what to name them. Maybe a dark Hendrickson?

Any assistance is appreciated.

 

[lestrout]

Yo 10No - sounds like female Hendricksons - E subvaria (old, traditional nomenclature)

 

[afishinado]

Hendrickson spinner w/ egg sack >

 

[10November]

Hendrickson spinner w/ egg sack >

Thanks. That is the may fly that I saw.

 

[krayfish2]

They even have a fly to match it

 

[10November]

They even have a fly to match it

Thanks. Now I have a name for the fly.

 

[krayfish2]

😁

 

[Jay_H]

Saw a good amount of Sulphurs rising tonight around 5:30 and then these pictured ones around 7:30 on a south central PA stream. Fish were sporadically rising, but nothing consistent.

 

[troutbert]

View attachment 1641230597
Saw a good amount of Sulphurs rising tonight around 5:30 and then these pictured ones around 7:30 on a south central PA stream. Fish were sporadically rising, but nothing consistent.

Probably sulphur spinners. http://www.troutnut.com/specimen/545