Mecynorrhina torquata or mecynorrhina ugandensis: which one is which?

Initially it was very confusing for me how to call these beetles correctly: mecynorrhina torquata or mecynorrhina ugandensis. It was a bit easier with a similar green beetle with no white stripes in the centre on the top called mecynorrhina torquata immacullicollis, which was one of my first beetles. Later I found out that according to (one of the) latest classification the mecynorrhina torquata has at least 4 subspecies: immacullicollis, poggei, torquata and ugandensis. So the full names of these subspecies will be mecynorrhina torquata immacullicollis, mecynorrhina torquata poggei, mecynorrhina torquata torquata and mecynorrhina torquata ugandensis. I knew that ugandensis and torquata can easily interbreed and produce  fertile offspring so there was not much of a surprise there:).  The existence of m.t. torquata and m.t. poggei was new information to me, although I saw the brown m.t. advertised as m.t. immacullicollis, which would fit into the description of m.t.t subspecies. Here I came across a wonderful map of the distribution of all 4 subspecies plus another popular related beetle from the same genus, mecynorrhina oberthueri ssp.    Unfortunately, I cannot find the original resource, so if anyone knows it's German source, please let me know. 

It is quite obvious that Mecynorrhina torquata ugandensis (often called Mecynorrhina ugandensis) and Mecynorrhina torquata immacullicollis (often called Mecynorrhina torquata) are the most popular species kept by hobbyists and breeders.  Mecynorrhina torquata ugandensis has a massive variety of colourations and therefore is the most sought after by collectors, particularly large male specimens. Someone even said that there are no two Mecynorrhina ugandensis of the identical colour and pattern in the wild:)

Sexing flower beetle (cetoniidae) larvae

Sexing flower beetle (cetoniidae) larvae, such as mecynorrhina ugandensis, protaetia or goliathus is not very difficult, however, requires some practice. It is much easier when larvae are reaching their third (L3 stage). In smaller larvae, such as at their L2 larval stage, finding the "right spot" is quite difficult because of their size and because of their mobility:  small larvae are normally very active:) With some practice anyone can do it. Determining the sex of the larvae by the size of its head capsule is not reliable, simply because the smaller larvae of the same age will have the smaller head capsule, irrespectively whether it's male or female.  It is best to see it in larvae which are clean of dirt and debris. On the bottom (ventral) side approximately in the middle of the last abdomenal segment in males of cetoniidae there is a small black slit/spot which is a part of  such-called "Harold's organ" (please see the photo of the L3 male larvae of the Mecynorrhina ugandensis, on the left). The spot may often look like as a hair root spot, apart there would not be any hair growing from it. The bigger larva is the bigger the size of the spot will be. That's why it is more easier to determine the sex of bigger larvae, which also normally less mobile than smaller larvae. Females (photo on right) do not have such black spot.