Here are three types of Chrysopidae (green lacewings) I found a few days ago. One had covered itself with insect parts (and spider web), another with (perhaps) fluff from some wooly homopteran (woolly alder aphids?), and a third with bits of lichen. There’s currently no way (as far as I know) to identify these larvae based on their debris preferences. And it seems likely that there are many undescribed species tooling around right in front of us (e.g.). Like many aspects of natural history, there’s a huge need for citizen scientists to forward information on lacewing larvae to experts — that need is apparently described in this article by Catherine Tauber et al. (Side note: don’t publish “calls for citizen science submissions” in paywalled journals that citizens cannot read.)
There are two species of moth that commonly mine grape leaves (Vitis spp.) where I live (Pennsylvania), and I think I’ve figured out how to distinguish them. I’m sharing here just in case somebody might be in need of tips.
The one I most commonly see is the grape leaf miner, Phyllocnistis vitifoliella. It has a very prominent, dark frass line in the center of its mine path, and the epidermis is visibly pushed up by the larva. Further images of the mine (and of the adult) can be found on the relevant BugGuide.net page.
Less commonly found, at least in my immediate area, is the American grape leaf miner, Phyllocnistis vitegenella. Unlike the previous species, there’s no visible frass line (the frass is dark and diffusely deposited, I gather), and the path looks more like the glossy residue left by a slug. A further difference is that late-instar P. vitegenella induce leaf margins to curl slightly prior to pupation. You can see that curling on the upper right part of the leaf in the photograph. BugGuide.net has more mine photographs. Photographs of the adults are here (auf Deutsch).
There are reports of a third species in Pennsylvania (and Kentucky), Antispila viticordifoliella, but I haven’t encountered it. So here’s a link to it’s Wikipedia page, with image from that page. Apparently the frass is collected in irregular lines or big clumps. There’s also A. oinophylla, but apparently it hasn’t been found in Pennsylvania (yet?).
If I’ve made any errors in the above, let me know.
I LOVE this clearwing moth. The raspberry crown borer (Pennisetia marginata) is a Batesian mimic of (I think) Vespula maculifrons and V. pensylvanica, our native yellow jackets. If you’re mildly impressed by the resemblance, you should see them in flight or walking around a leaf. They have completely nailed the cocky, jerky yellow jacket attitude. I can’t seem to find a video to link to, but this is a related species. If you live near a big patch of raspberry or blackberry, go look for them right now … they are out mating and laying eggs.
Found this Phymata nymph in nearby Newtown Square (PA) a few weeks ago but have been unable to identify it further than genus. Anyone know of a good online key to eastern species that might work for juveniles?
Here are photographs of a clump of ectoparasitic larvae I found attached to a small caterpillar. I think they are wasps in the genus Euplectrus (Eulophidae). Females apparently inject hosts with a venom that prevents the caterpillar from molting, thus preventing the caterpillar from shedding the larvae along with the discarded skin. Caterpillar was approximately 12 mm in length. Media, PA.