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Photo#153256
Whiteflies

Whiteflies
Redwood City, San Mateo County, California, USA
October 21, 2007
Size: 1 mm
Found this group of white "hairs" and numerous minute eggs and 1-mm, white moth-like (?) bugs on the underside of a leaf from an ornamental shrub. Cropped image. Any ideas of insect order, at least? Thanks!

Images of this individual: tag all
Whiteflies Whitefly Whitefly Whitefly

I suggest...
Woolly whitefly (Aleurothrixus floccosus). I've only found mention of two whitefly species that make substantial fluff like this, and the other species (giant whitefly) has strongly patterned wings. Maybe someone who actually knows about whiteflies can confirm...

 
I would place it in Giant Whi
I would place it in Giant Whitefly (Aleurodicus dugesii). The long strands are typical of this species, while Wooly Whitefly has shorter, tufty wool that just covers the nymphs. I also seem to make out some vague patterning on the wings of the adults.

 
Size?
What's the normal size for giant whiteflies? I would have thought 1 mm would be too small... I see what you're saying about the wool though.

 
Adult Giant Whitefly can be 3
Adult Giant Whitefly can be 3-4 mm (ca. 3/16 in.) in length. I placed more importance in the long strands than the size as sited. Wooly Whitefly just doesn't make this kind of material.

 
Lots of these whiteflies -
in my urban area - I'll see if I can find some more this upcoming year...

Have a look at these
I stumbled across a couple of images you might be interested in.

 
Thanks so much John!
These pictures are an excellent match for what I'm seeing! You and Dr. Hamilton have both come to the same conclusion - thanks for your help! I'm hesitant to assume that we've found the precise species without some further confirmation, but I will put these pics into the Whitefly family if there are no objections...

Not an ID
But you might take a look in aphids, likely woolly aphids.
http://bugguide.net/node/view/147/bgpage

 
Thanks!
I've now added some backlit, poor quality photos of the small bugs on the leaf, taken with a digital camera pointed down the ocular of a compound microscope (at 40X total mag). These seem to show winged aphids with cornicles. Maybe not wooly aphids, as there doesn't seem to be hair on these insects? Maybe a gall induced by aphids? Help!

 
Changed -
titles of images to avoid confusion.

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