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Post by politula on Jun 29, 2017 19:35:32 GMT -8
I've been told that preserving Chrysina in alcohol will give them purple botches, true? I'll be using 70% iso.
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Post by bandrow on Jun 30, 2017 5:52:12 GMT -8
Hi Politula,
YES, it will! I made this error on my first trip to Arizona years ago and learned my lesson. On that trip, I put Chrysina into isopropyl alcohol and about half developed blotches varying from tiny speckles to big stains. From then on, I killed them in ethyl acetate or cyanide and then papered them in glassine lep envelopes with a piece of paper towel for padding - all came home beautiful that way.
Cheers!
Bandrow
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Post by politula on Jun 30, 2017 14:30:25 GMT -8
Thanks! Good thing I asked!
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Post by bandrow on Jun 30, 2017 18:55:11 GMT -8
Hi Politula,
I'd use the same "papering" method for some of the other rutelines as well - especially Cotalpa and Parabrysopalis - these discolor easily too...
Good collecting!
Bandrow
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Post by lucanidae25 on Jun 30, 2017 20:03:16 GMT -8
Consider you guys are so lucky, it's only Chrysina will discolor. In Australia nearly half of Coleoptera will discolor in some way or other.
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Post by tv on Jul 12, 2017 12:30:04 GMT -8
Does anyone know what the mechanism of discoloration is? Is it something that can be reversed?
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Post by lucanidae25 on Jul 19, 2017 0:19:31 GMT -8
I believe it couses by oil and bacteria on translucent colors. It's extremely hard to reverse. The only thing I've found had some kind of seccess is by using bleach.
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