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Old 07-07-2011, 01:49 PM   #11
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Notice the first two abdominal segments called spiracles are bare of leg or proleg in caterpillar.


http://www.enchantedlearning.com/sub...erpillar.shtml
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Old 07-07-2011, 03:26 PM   #12
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I'm confused. In the post of yours above you stated "Sawfly larvae may be distinguised by their having fleshy 'prolegs' on the venter of abdominal segments one and two; caterpillars always lack prolegs on these abdominal segments."

But here in this post you're saying ""Prolegs" are fleshy unsegmented structures that occur on some abdominal segments of the larvae of nearly all true caterpillars,..."
Wait! Now I'm getting confused.

Originally, I thought that the 3 pairs of "legs" on the thorax (assuming caterpillars have a thorax...or on what will become the thorax I guess) were called "prolegs". Now, I'm thinking that they may have a different name...and that there are those 6 legs *plus* the prolegs that run along the back end of the larva. Is that correct...or even close?
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Old 07-07-2011, 03:31 PM   #13
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Thanks, Gloria. Your picture and another link I found through my own search, seems to have cleared things up a bit. Last year, I think I was under the misconception that caterpillars had only prolegs, but sawfly and other insects had these true legs plus the prolegs. Looks like I'm wrong...perhaps it was the number of prolegs or something that helped suunto deduce that it was the larva of something other than a butterfly--I'd have to search for my original post...that is where my misconception began.

Hope this is helpful: Caterpillar Diagram - Parts of a Caterpillar Diagram
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Old 07-07-2011, 05:47 PM   #14
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Found a picture that has a similar caterpiller and sawfly larvae next to one another for comparison.

http://www.entomology.umn.edu/cues/Web/196Sawflies.pdf
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Old 07-07-2011, 06:02 PM   #15
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Found a picture that has a similar caterpiller and sawfly larvae next to one another for comparison.

http://www.entomology.umn.edu/cues/Web/196Sawflies.pdf

Very clear, Gloria. Thank you.
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Old 07-07-2011, 10:36 PM   #16
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Quote:
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Notice the first two abdominal segments called spiracles are bare of leg or proleg in caterpillar.




Caterpillar Anatomy- EnchantedLearning.com



Got it! Now I understand. Thanks, Gloria
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Old 07-08-2011, 07:48 AM   #17
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Quote:
Originally Posted by Gloria View Post
Notice the first two abdominal segments called spiracles are bare of leg or proleg in caterpillar.
http://www.enchantedlearning.com/subjects/butterfly/anatomy/Caterpillar.shtml
Just a bit of clarification: The first two abdominal segments of caterpillars are not called spiracles; the diagram simply has a line pointing to the spiracles (external openings to the tracheal - breathing - system) on those segments. Spiracles are found on most abdominal and thoracic segments, but their number may be greatly reduced in some insects.
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Old 07-08-2011, 10:15 AM   #18
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Thank you suunto!
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Old 08-02-2011, 11:20 PM   #19
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Both of these clusters were found on a black walnut tree in our yard. Are they different species or the same species at different stages? What are they, any ideas?
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Larval identity???-dsc00248.jpg   Larval identity???-dsc00268-crop.jpg   Larval identity???-dsc00256.jpg  
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Old 08-03-2011, 10:53 AM   #20
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Both of these clusters were found on a black walnut tree in our yard. Are they different species or the same species at different stages? What are they, any ideas?
These appear to be [of all things - ;-) ] walnut caterpillars; Datana integerrima (Lepidoptera: Notodontidae) - see Walnut Caterpillar
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bug id, bugs, caterpillar, caterpillar id, clarus, epargyreus, epargyreus clarus, identity, insect id, insects, larval, silver-spotted skipper, skipper

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