Tag Archives: Madera Canyon

Arizona Oak Galls, Part 5

Here is yet another gall from Arizona white oak. It is another “oak apple,” superficially similar to these, which I now know to be Atrusca aggregata (thanks to Jim Zimmerman, who has studied southwestern cynipid galls for many years and … Continue reading

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Arizona Oak Galls, Part 4

Here is yet another type of gall found on the underside of oak leaves in Madera Canyon. Seven weeks after I collected these, two parasitoids emerged. The one above is another male Torymus (Torymidae), which may or may not be the same … Continue reading

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Arizona Oak Galls, Part 3

Okay, having looked at photos of all the possible species, I’m pretty well satisfied that Arizona white oak (Quercus arizonica) was the host of all of the galls I collected in Madera Canyon that actually produced adult cynipid wasps. Armed … Continue reading

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Arizona Oak Galls, Part 2

Gall #2 is a fancy cup-shaped one found on the undersides of leaves, sometimes in clusters. A month after I collected them, the galls (kept in a tightly sealed vial) had become covered with mold, but a single wasp chewed … Continue reading

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Arizona Oak Galls, Part 1

On my trip around the western US in the fall of 2012, I mostly limited my collecting to leafminers.  However, I made an exception when I got to Madera Canyon, Arizona, because I had found all kinds of interesting oak … Continue reading

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Monthly Mystery #14: Holes and Tunnels in Agave Leaves

On page 302 of Tracks & Sign of Insects, there is a photo of a fleshy yucca leaf riddled with holes, next to a close-up of the eggs Noah found in one of the holes.  As explained in the text, after … Continue reading

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Arizona Bugs, part 2

If I had to pick a favorite spot out of all the places we explored on our two-and-a-half-month road trip last fall, it would be Madera Canyon in southern Arizona.  The scenery there isn’t particularly eye-catching; in fact, I didn’t … Continue reading

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