Hyadaphis Kirkaldy

This is a genus for over a dozen species, all of palaearctic origin.  Like a lot of introduced species, I tend to pass this genus over rather a lot in my collecting, so the records don’t reflect its true distribution and abundance.  Host plant associations are mostly Caprifoliaceae and Apiaceae.

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Hyadaphis passerinii (del Guercio)

In my area of western North America, this is the most common species of Hyadaphis.  It has penetrated native forests to some extent, where I have found it on native Lonicera vines.  I have material from Washington, Oregon, Idaho, and California.

Hyadaphis passerinii from Lonicera in northern Idaho.

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Hyadaphis tataricae (Aizenberg)

This species has been established and scattered around North America for a couple decades at least.  I have found it only a few times, and collected it only once. It is extremely small and when I’ve seen it, very well-hidden among deformed leaves of its host, Lonicera tatarica.

Hyadaphis tataricae from eastern Idaho on an ornamental Lonicera tatarica.