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Home » Guide » Arthropods (Arthropoda) » Insects (Insecta) » Beetles (Coleoptera) » Water, Rove, Scarab, Longhorn, Leaf and Snout Beetles (Polyphaga) » Long-horned and Leaf Beetles (Chrysomeloidea) » Leaf Beetles (Chrysomelidae) » Chrysomelinae » Chrysomelini » Chrysomelina » Chrysomela » Subgenus Macrolina (Chrysomela Subgenus Macrolina) » Knab's Leaf Beetle (Chrysomela knabi)
Photo#130293
Chrysomela - unident - Chrysomela knabi
Copyright © 2007 Rich Kelly

Chrysomela - unident - Chrysomela knabi
Prompton St. Pk., Wayne County, Pennsylvania, USA
June 26, 2007
Size: 5mm
C. knabi? Common on willow.
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Contributed by Rich Kelly on 24 July, 2007 - 5:58pm
Last updated 28 September, 2007 - 4:14pm

Moved
Moved from Beetles.
… Eric R. Eaton, 28 September, 2007 - 4:14pm login or register to post comments

probably
from Downie and Arnett, given your location and on willow, C. knabi appears correct.
… Tim R. Moyer, 27 July, 2007 - 9:49pm login or register to post comments

 
Chrysomela
How is this different from C. interrupta here; http://www.cedarcreek.umn.edu/insects/album/024107064ap.html
or is that a synonym of knabi??
… Rob Westerduijn, 8 August, 2007 - 4:12pm login or register to post comments

 
both listed
Rob, you would know better than I. Downie and Arnett list both C. interrupta and C. knabi. They have similar elytra markings, but split in the key with C. interrupta stated as on Alnus (Alder), which is unusual here in the east except for one native and one introduced species, and the beetle's distribution includes southeastern PA, but is more of a southern species. And C. knabi stated as on Salix (willow), with a widespread (beetle) distribution. So that's how I got C. knabi - strictly based on D&A's key and the stated plant this one was found on. But corrections welcome :)
… Tim R. Moyer, 8 August, 2007 - 8:54pm login or register to post comments

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