I had my mom buy me a litter sifter and Winkler funnel from a Japanese distributor in Japan. They finally arrived today. I’m excited to try it out.

A nice pile of decaying grass clippings, on the way to my walk to downtown Lawrence, distracted me on the way to dinner yesterday. Maybe I’ll try the new goods on them fine clippings.

I got the latest issue of The Newsletter of the Staphylinidological Society of Japan. On this issue Yuji Katayama summarized the taxonomic status of Japanese tachyporines.

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Cedius spinosus LeConte

Cedius spinosus LeConte

Another species of Cedius from Kansas. Cedius spinosus cooccur with C. zeigleri in nests of Aphaenogaster that are constructed in dry wood. C. zeigleri is quite large and is about 4 mm while C. spinosus is about 3 mm. The smaller spinosus is more common compared with the larger zeigleri. Maybe the two species, assuming they have very similar life histories, can perhaps coexist because of their differential boday sizes, allowing to them to specialize on specific prey size ranges. Such species community compositional studies have found that bod size can be an indicator of species compatibility. Plus, maybe big collembolans are rarer in ant nests, explaining why zeigleri would be less common.

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