Saddle Caterpillars

I have never heard of saddle caterpillars before.   These tiny little caterpillars are a stinging variety that, unfortunately, Cari discovered on our front porch.   All she did was brush up against this leaf with the critters hiding on the underside. 

As she brushed up against it, she received instant pain.  She said for a minute her whole arm got tingly.  Her upper arm, where she got hit, stayed sore for the rest of the day.