Winsome invaders, lose some invaders, continued

Despite the superabundance of Japanese beetles (Popillia japonica) in the yard, I have hardly ever seen anything attempt to eat the beetles.  (One attempt, made by an eastern phoebe chick, was fatal for both the beetle and the chick.)  However, while hunting for the beetles, I have occasionally come across ones that were already dead.  In each case, the dead beetle was loosely wrapped in spider silk; in a couple of cases, the spider was still there.

A Japanese beetle captured by a female candy stripe spider (Enoplognatha ovata, ovata color morph).

The spiders making meals out of the Japanese beetles were a type of cobweb spider.  Although they belong to the same family as black widows, they have a much friendlier name: "candy stripe spiders" (Enoplognatha ovata).  Interestingly, this predator of Japanese beetles is itself an introduced species, yet it comes from Europe not Asia.