Here is some history of Mantisplace.com 

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 Here we have experiments with the blue bottle fly pupae

The Pennsylvania State University (psu.edu)

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2.1 Test Specimens A blue bottle fly was used for testing in this thesis. The blue bottle fly (Calliphora vomitoria) is a medium to medium-large size fly and has a typical body that is 125 mm long [42]. The blue bottle flies used for this research were purchased from Mantisplace.com. The blue bottle fly is a relatively large fly, which made the tethering process employed in this research much easier. A blue bottle fly is shown below in Figure 3. The flies were purchased as Larvae and kept in a screened enclosure while maturing. Once mature, individual flies were removed from the screened enclosure for tethering and flight mill testing.

For more info on the blue bottle fly click the PA link above for full information.