Tag Archives: insect

Banded tussock moth

Banded tussock moth (Halysidota tessellaris) caterpillar with stemmata peeking out from behind the anterior tufts. The second photograph shows the barbed setae, which will eventually be detached and rewoven into the cocoon.

Colin Purrington Photography: Insects &emdash; Banded tussock moth (Halysidota tessellaris) caterpillar

Colin Purrington Photography: Insects &emdash; Barbed setae of the banded tussock moth (Halysidota tessellaris) caterpillar

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Checkered-fringe prominent

Found two of these caterpillars on blackberry last week. I really should have brought them back home to see if they would eat morning glory leaves. Apparently they hate morning glory despite being named Schizura ipomoea (and thus traditionally called a morning glory prominent). Also sometimes referred to as the false unicorn prominent. You can distinguish the checkered-fringe from the unicorn prominent (Schizura unicornis) on the basis of head striping (among other differences). But don’t handle them during the identification process: they spray mixture of formic and acetic acid from that dorsal horn on abdominal segment one, and that will hurt and make your skin blister.

According to one study, these caterpillars coat the tissues of freshly-girdled tree stems with fluid. The authors guess that the fluid contains something that blocks the de novo production of chemical defenses in the leaves. This “chew and spit” behavior seems to be common in the family (Notodontidae). More details and papers on the behavior at David Dussourd’s website.

Colin Purrington Photography: Insects &emdash; Checkered-fringe prominent (Schizura ipomoeae)

Colin Purrington Photography: Insects &emdash; Checkered-fringe prominent (Schizura ipomoeae)

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Green lacewing larvae covered with debris

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.)

Colin Purrington Photography: Insects &emdash; Green lacewing larva (Chrysopidae) with debris

Colin Purrington Photography: Insects &emdash; Green lacewing larva (Chrysopidae) with debris

Colin Purrington Photography: Insects &emdash; Green lacewing larva (Chrysopidae) covered with lichen

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Ectoparasitic wasp larvae

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.

Colin Purrington Photography: Insects &emdash; Larvae of ectoparasitic wasps on caterpillar

Colin Purrington Photography: Insects &emdash; Larvae of ectoparasitic wasps on caterpillar

Colin Purrington Photography: Insects &emdash; Larvae of ectoparasitic wasps on caterpillar

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