So I probably ought to single out ones that I like or something
Lepidivine
Latin reference + biological clarity + clear expression of power. I really wanted to get a "Lepid-" name, and this one has delivered. My only gripe with it is the four syllables (generally I am of the opinion that two is optimal, and three excessive)
Retriarch
I like how it combines both Bug and Psychic in "arch" to an extent - indeed, the "-arch" as a suffix is one of my favourites. Not so sure about the application of "Retri-" but it's still pretty solid.
Divinisect / Divinimoth
Lumping these together because they're basically the same corruption. I like the incorporation of the divine (and contrary to other opinions, I do think that the "divini-" prefix is far superior to "divin-"), though I'm not terribly keen on the common suffix. As with the above, I'm also not terribly sure about the four syllables, but the middle I is necessary to avoid consonant clashing.
Motatron
Yay, obscure Jewish mysticism references. I like the way you have used the name, though I still think that "Mothatron" would be better in order to make the moth reference clearer. The only problem with Metatron as a name is that most people's immediate reaction is to think of the robotic rather than the divine, but hey, that's the charm of a complex name.
Sephimoth
Well, if I'm going to include a Sephi- name, this is probably the one. And I think I just might, you know.
Magnanimoth
While I, ahem, love this name, it is too long by one letter, and as such unsalvageable. It's a shame. Possibly you could try the -mous -> -moth conversion on some different words, to get things like Enormoth, Ginormoth, or Infamoth (those are just some off the top of my head)
Although, Venomoth has kind of already done that with the word venomous, so there's the issue of precedence. But it's a lovely idea should you wish to continue with it.
Samaoth
I like the incorporation of Samael here, as I do most obscure biblical references. Samael is a pretty hard word to portmanteau with, well, anything, but you seem to have managed it, albeit in a roundabout way, which is the main thing I don't like about the name. Not sure if you could hypothetically do a similar thing with Sariel or Azrael, as they seem like easier names to stick other things on.
Deusect
Only -sect name I'm really willing to consider, since Genesect is everywhere and kind of dampens the party (nobody uses Parasect or Venomoth so the issue is not so great with them). Mainly because it incorporates Deus, which is nice, simple Latin, though I'd ask for a suffix change.
Motherian
I like the name, though I question the etymology, as the word therian is primarily associated with mammalian connotations, rather than any great spiritual level. I would advise a change to "Mothereal" as per Moth + Ethereal, which I think fits a tad better. Of course, it's up to you.
Note that here are some elementary criteria I'm using to pick these names:
- References both the Bug and the Psychic-type in some capacity
- Basic entomological accuracy of names (eg. no flying arthropods have a carapace, etc)
- Doesn't have a common name ending (generally this will be -moth or -sect, though I have made plenty of exceptions)
- Last but not least, extremely pretentious or obscure or asinine roots.
Finally, some names I came up with that may give you some ideas, or at least, give you an idea of what I am looking for:
Behemoth (Huge, powerful entity, biblical word, also contains moth)
Cytodel (Cyto + Citadel)
Asmothdeus (Asmodeus + Moth)
Papillord (Papilio (Latin for moth) + Lord)
Mothereign (Moth + Sovereign)
Cuirassect (Cuirass + Insect)
Leraphiel (Lepidoptera + Seraphiel)
... you can probably continue the list for yourself. Feel free to take any of these, as you please.
Continuez tout droit.
EDIT: Also, here's an interesting note: the Ancient Greek word for "Moth" or "Butterfly" is "ψυχή" (or rather, "Psyché"). Have fun with that.